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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued From the Equity Offering Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares issued from the equity offering value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued from the Equity Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range ten.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Ten [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.13</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AgreementWithArmsLengthThirdPartyAdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for agreement with an arms-length third-party advisor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AgreementWithArmsLengthThirdPartyAdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Agreement With Arms Length Third Party Advisor [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AgreementWithArmsLengthThirdPartyAdvisorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement with an arms-length third-party advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range nine.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.07</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EventsAfterReportingPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Events After Reporting Period [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EventsAfterReportingPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Events after reporting period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EventsAfterReportingPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Events After Reporting Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ArkansasLithiumLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Arkansas Lithium LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ArkansasLithiumLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Arkansas Lithium LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The decrease in acquisition costs on exploration and evaluation assets resulting from the deconsolidation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets Acquisitions Costs Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Decrease in acquisition costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountOfMilestonePaymentsToReceive_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of milestone payments to receive.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountOfMilestonePaymentsToReceive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount Of Milestone Payments To Receive</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountOfMilestonePaymentsToReceive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of milestone payments to receive</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsNoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsNoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-based payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets (liabilities)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NetAssetsLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of property, plant and equipment [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Classes of property, plant and equipment [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of lease liabilities, classified as financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease liability - long-term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities - long-term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Lease liabilities - non-current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial assets [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_KeyManagementPersonnelCompensationSeparationBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Separation benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_KeyManagementPersonnelCompensationSeparationBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key Management Personnel Compensation, Separation Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_KeyManagementPersonnelCompensationSeparationBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Key management personnel compensation, separation benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Option life, share options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected life of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for impairment loss recognised in profit or loss, goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnusedTaxLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unused tax losses [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UnusedTaxLossesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-capital loss carry forwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units (RSUs)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">RSU</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxLossesResearchAndDevelopmentTaxCreditAndOtherTemporaryDifferencesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for tax losses, research and development tax credit and other temporary differences.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxLossesResearchAndDevelopmentTaxCreditAndOtherTemporaryDifferencesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Losses, Research And Development Tax Credit and Other Temporary Differences [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxLossesResearchAndDevelopmentTaxCreditAndOtherTemporaryDifferencesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax losses, research and development tax credits and other temporary differences</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OfficeTrailerRentalCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for office trailer rental costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OfficeTrailerRentalCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office trailer rental</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public offering [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current payables to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share issued for private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share issued for private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssueOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued under ATM and consideration for services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredInProductionOrOtherSimilarUnitsIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Useful life measured in production or other similar units, intangible assets other than goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredInProductionOrOtherSimilarUnitsIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Useful life measured as period of time, intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of exchange rate changes on cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of exchange rates on cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital contributions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThirteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Thirteen Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThirteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range thirteen.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThirteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.35</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office and administration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForDecreaseIncreaseInOtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments For Decrease (Increase) In Other Current Assets And Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForDecreaseIncreaseInOtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments for decrease (increase) in other current assets and receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForDecreaseIncreaseInOtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current assets and receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeInnovationsCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Telescope Innovations Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeInnovationsCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Telescope Innovations Corp</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeInnovationsCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Telescope</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">DSU</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Share Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeferredShareUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for deferred share units (DSU). DSUs may be redeemed upon retirement or termination from the Company. The plan is a fixed plan pursuant to which the aggregate number of common shares to be issued shall not exceed 10% on the Company's issued and outstanding common shares when combined with the aggregate number of Option, RSU, PSU and DSU.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplorationAndEvaluationAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and evaluation assets [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplorationAndEvaluationAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted average grant date fair value, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of other equity instruments outstanding in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted average grant date fair value, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDemonstrationPlantExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Demonstration Plant Explanatory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDemonstrationPlantExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of demonstration plant explanatory.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDemonstrationPlantExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demonstration Plant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossFromOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Profit (loss) from operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossFromOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossFromOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gains (losses) on financial assets at fair value through profit or loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value gain on financial asset - FID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Fair value gain on financial asset - FID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SWALithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SWA Lithium Financing LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SWALithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SWA Lithium Financing LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SWALithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SWA Lithium Financing LLC Member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CumulativeGainLossPreviouslyRecognisedInOtherComprehensiveIncomeArisingFromReclassificationOfFinancialAssetsOutOfFairValueThroughOtherComprehensiveIncomeIntoFairValueThroughProfitOrLossMeasurementCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative gain (loss) previously recognised in other comprehensive income arising from reclassification of financial assets out of fair value through other comprehensive income into fair value through profit or loss measurement category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CumulativeGainLossPreviouslyRecognisedInOtherComprehensiveIncomeArisingFromReclassificationOfFinancialAssetsOutOfFairValueThroughOtherComprehensiveIncomeIntoFairValueThroughProfitOrLossMeasurementCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Currency translation differences reclassified to net income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForChangesInAccountingStandardsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's accounting policy for changes in accounting standards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForChangesInAccountingStandardsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for changes in accounting standards [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForChangesInAccountingStandardsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in accounting standards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax expense (income) at applicable tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax recovery at the statutory rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ASSETS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of leases [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right of Use Asset and Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PilotPlantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for pilot plant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PilotPlantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pilot Plant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PilotPlantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pilot plant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInDecommissioningProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (decrease) in Decommissioning Provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInDecommissioningProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (decrease) in decommissioning provision.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInDecommissioningProvision_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in decommissioning provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortisation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted stock units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Vesting Of Restricted Stock Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value vesting of restricted stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carrying amount [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying amount [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exploration and evaluation assets impairment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Useful life measured as period of time, property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Useful life measured as period of time, property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for determining components of cash and cash equivalents [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of Number and Weighted Average Remaining Contractual Life of Outstanding Share Options [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Equity incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Incentive Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CurrencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Currency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedForEvaluationExplorationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued for Evaluation Exploration Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedForEvaluationExplorationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued for exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInSmackoverLithiumTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Interests In Smackover Lithium Table Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInSmackoverLithiumTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure Of Interests In Smackover Lithium Table Text Block.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInSmackoverLithiumTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of information about Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseOfLithiumCarbonateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected to Purchase of Lithium Carbonate Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseOfLithiumCarbonateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Expected to purchase of lithium carbonate term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseOfLithiumCarbonateTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected to purchase of lithium carbonate term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible assets other than goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock options exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Information by type of related party transaction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsRelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of attribution of expenses by nature to their function [abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of transactions between related parties [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Attribution of expenses by nature to their function [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of non-adjusting events after reporting period [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Profit (loss) before tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net (loss) income before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDetailedInformationAboutPlantOperationsCostsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Detailed Information About Plant Operation Costs Explanatory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDetailedInformationAboutPlantOperationsCostsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of detailed information about plant operation costs explanatory.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfDetailedInformationAboutPlantOperationsCostsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Demonstration Plant Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proportion of ownership interest in subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proportion of ownership interest in subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ownership (Percentage)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current borrowings and current portion of non-current borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current borrowings and current portion of non-current borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range six.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">3.77</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of offsetting of financial assets [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForFairValueGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for fair value losses (gains)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForFairValueGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value gain on Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL LIABILITIES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current investments other than investments accounted for using equity method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsOptionPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The Option payments of acquisition costs on exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsOptionPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets, Acquisitions Costs, Option Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsOptionPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SuppliesCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for supplies cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SuppliesCostMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Applicable tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ApplicableTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of new shares issued during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued under ATM and consideration for services (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfRegulatoryCapitalEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from issue of regulatory capital, equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssueOfRegulatoryCapitalEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from equity offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of stock options outstanding and exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Options Outstanding and Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsStatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ifrs Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsStatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsStatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Intangible asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsStatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ifrs Statement Line Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of share of net assets of joint ventures accounted for using the equity method.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Of Net Assets Of Joint Ventures Accounted For Using Equity Method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Company's share of Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialInstrumentsAndFinancialRiskManagementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments and Financial Risk Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additions other than through business combinations, property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and Evaluation Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Property, Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The description of the entity's accounting policy for equity instruments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for equity instruments [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments forfeited in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of RSUs, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of stock units, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of related parties [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PersonnelCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for personnel costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PersonnelCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Personnel</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfOtherEquityInstrumentsConversionOfDSUsToCommonSharesSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value, Conversion of DSUs to common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfOtherEquityInstrumentsConversionOfDSUsToCommonSharesSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of other equity instruments conversion of DSUs to common shares sharebased payment arrangement 2019</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfOtherEquityInstrumentsConversionOfDSUsToCommonSharesSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average exercise price of other equity instruments conversion of DSUs to common shares sharebased payment arrangement 2019.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Patents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentRestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current restricted cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentRestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnDisposalsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Net gains (losses) on disposals of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnDisposalsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value gain on Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnDisposalsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value gain reflected in net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnDisposalsOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of change in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdvisoryFeesToBeSettledInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of advisory fees to be settled in shares by the company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdvisoryFeesToBeSettledInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advisory Fees To Be Settled In Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdvisoryFeesToBeSettledInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advisory fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in joint ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentsInJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment in Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReclassifiedFromReserveToShareCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassified from reserve to share capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReclassifiedFromReserveToShareCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassified from reserve to share capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Portion of gains (losses) recognised when control of subsidiary is lost, attributable to recognising investment retained in former subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on deconsolidation of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) decrease (increase) in restricted cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfPatentsNoticesOfAllowancesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of patents for which notices of allowances are received from authoritative office.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfPatentsNoticesOfAllowancesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Patents, Notices of Allowances Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfPatentsNoticesOfAllowancesReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number patents for which Notices of Allowance from the USPTO</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ScheduleOfInvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of investment in equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ScheduleOfInvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ScheduleOfInvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Company's Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of income tax [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsModifiedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options modified (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsModifiedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Share Options Modified In Share Based Payment Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsModifiedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of share options modified in share based payment arrangements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsVestedInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Share Options Vested in Share-based Payment Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsVestedInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of share options vested in share-based payment arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsVestedInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and Evaluation Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash flows from (used in) investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of material accounting policy information [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Material Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase through new leases, liabilities arising from financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToSwaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for financial asset - FID in relation to SWA.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToSwaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Asset - FID In Relation To SWA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToSwaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SWA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_USD_lbl" xlink:role="http://www.xbrl.org/2003/role/label">United States of America, Dollars</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_USD_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">USD</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MajorOrdinaryShareTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Major ordinary share transactions [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MajorOrdinaryShareTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Major Ordinary Share Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwelveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Twelve Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwelveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range twelve.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwelveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.42</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deficit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GovernmentGrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for government grant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GovernmentGrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Government Grants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GovernmentGrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government Grants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Texas Lithium Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Texas Lithium Corp. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Texas Lithium Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Financial Statement Error Correction [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfRisksDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of risks [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ChangeInCurrentLiabilitiesRelatingToExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change In Current Liabilities Relating To Exploration And Evaluation Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ChangeInCurrentLiabilitiesRelatingToExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in current liabilities relating to exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ChangeInCurrentLiabilitiesRelatingToExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in exploration and evaluation expenditures included in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClosingForeignExchangeRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Closing foreign exchange rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClosingForeignExchangeRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClosingForeignExchangeRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Closing rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ranges of exercise prices for outstanding share options [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of company's most significant subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseByNatureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for research and development expense [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current liabilities [Default Label]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MasterServicesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Master Services Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MasterServicesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MSA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Useful life measured as period of time, intangible assets other than goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization period of intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of other equity instruments granted in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-adjusting events after reporting period [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfJointVenturesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of joint ventures [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfJointVenturesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Method Investment in Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwardsIndefinite_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Capital Loss Carryforwards Indefinite</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwardsIndefinite_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non capital loss carryforwards indefinite.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwardsIndefinite_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non capital loss carryforwards indefinite</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfSharesToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares to be issued by the company for settlement of advisory fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfSharesToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Shares To Be Issued For Settlement Of Advisory Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfSharesToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement of advisory fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommonSharesIssuedExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Shares Issued Exercise of Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommonSharesIssuedExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common shares issued exercise of options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Currency translation differences of foreign operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Currency translation differences of foreign operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfJointVenturesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment in Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range seven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Seven [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">3.85</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying amount of acquisition costs on exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, period end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for impairment of non-financial assets [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of non-financial assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsOutstandingRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsOutstandingRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Share Options Outstanding [Roll Forward]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsOutstandingRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IntellectualPropertyRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands intellectual property rights.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IntellectualPropertyRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IP Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AqualungCarbonCaptureAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Aqualung Carbon Capture AS.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AqualungCarbonCaptureAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aqualung Carbon Capture AS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of stock per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale Of Stock Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of fair value measurement of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value Measurement by Levels of Financial Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExercisePriceOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Exercise Price, Options Outstanding (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExercisePriceOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated other comprehensive income (loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock issued during period shares vesting of deferred stock unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares vesting of deferred stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of DSUs, (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsPlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Information by plan name for share-based payment arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsPlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for share-based payment transactions [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital reserve</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The decrease in exploration and evaluation assets resulting from the deconsolidation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsDeconsolidation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Decrease in exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amounts payable, related party transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable, related parties transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options exercised in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options exercised (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CashReceivedFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow from cash received from related party for working capital needs associated with deconsolidated subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CashReceivedFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Received From Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CashReceivedFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash received from related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of the entity's stock, including, but not limited to, initial public offering (IPO) and private placement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of risk management strategy related to hedge accounting [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseMaximumOfLithiumCarbonatePerYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected to Purchase Maximum of Lithium Carbonate Per Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseMaximumOfLithiumCarbonatePerYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Expected to purchase maximum of lithium carbonate per year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExpectedToPurchaseMaximumOfLithiumCarbonatePerYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected to purchase maximum of lithium carbonate per year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Exercise Price, Options exercisable (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price, Options Exercisable (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of DSU granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments granted in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of stock units, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProportionOfOwnershipInterestInJointVenture_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proportion of ownership interest in joint venture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of intangible assets other than goodwill [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsReceivedFromEquinor_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds received from Equinor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsReceivedFromEquinor_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Received From Equinor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsReceivedFromEquinor_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds received from Equinor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of property, plant and equipment [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additions other than through business combinations, intangible assets other than goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Texas Lithium Financing LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Texas lithium financing LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TexasLithiumFinancingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Texas Lithium Financing LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditedAnnualFinancialStatements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Audited Annual Financial Statements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of carrying value of the property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in share issuance costs included in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for increase (decrease) in trade accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReclamationDepositNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of reclamation deposit noncurrent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReclamationDepositNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclamation Deposit Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReclamationDepositNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclamation deposit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockAveragePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of stock per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockAveragePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Average Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockAveragePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock average price per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range eight.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Eight [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2.97</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">California Properties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">California properties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">California Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDecommissioningRestorationAndRehabilitationProvisionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for decommissioning, restoration and rehabilitation provisions [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForDecommissioningRestorationAndRehabilitationProvisionsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decommissioning provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInNumberOfSharesOutstandingThroughStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase (decrease) in the number of shares outstanding through stock options exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInNumberOfSharesOutstandingThroughStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock options exercised (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInNumberOfSharesOutstandingThroughStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercised (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureCapitalManagementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfShareOptionsModifiedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options modified (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfShareOptionsModifiedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Exercise Price Of Share Options Modified In Sharebased Payment Arrangement 2019</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageExercisePriceOfShareOptionsModifiedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average exercise price of share options modified in sharebased payment arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for undistributed profits of investments accounted for using equity method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Investment loss from Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAndLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAndLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsToRightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additions to right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdditionsToRightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfRisksAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of risks [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NoncashInvestingFinancingAndFinancingSupplementalDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Investing Financing and Financing Supplemental Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NoncashInvestingFinancingAndFinancingSupplementalDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NoncashInvestingFinancingAndFinancingSupplementalDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Cash Flow Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for financial liabilities [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for share-based payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForSharebasedPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsForShareIssueCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for share issue costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsForShareIssueCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PaymentsForShareIssueCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Share issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on deconsolidation of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transition report.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromExerciseOfOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from exercise of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary difference, unused tax losses and unused tax credits [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureNatureOfOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureNatureOfOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_JointVenturesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Joint ventures [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquinorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equinor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquinorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equinor [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquinorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equinor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of risk management strategy related to hedge accounting [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments and Financial Risk Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfReasonablyPossibleChangeInRiskAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of a reasonably possible change in in risk assumption.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfReasonablyPossibleChangeInRiskAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Reasonably Possible Change In Risk Assumption</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfReasonablyPossibleChangeInRiskAssumption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reasonably possible change In US Dollar relative to Canadian Dollar</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for earnings per share [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earnings per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentRegistrationStatement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Registration Statement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PreviousAtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Previous ATM Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PreviousAtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Previous At The Market Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PreviousAtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Previous at the market offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PlantOperatingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plant Operating Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PlantOperatingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Plant operating expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PlantOperatingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plant operating expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease liability - short-term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities - short-term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Lease liabilities - current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for leases [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_BusinessContactMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Contact [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EquityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MineralPropertyInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for mineral property interest carried forward for use against future taxable profit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MineralPropertyInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mineral property interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MineralPropertyInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mineral property interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalReserveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reserves [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CapitalReserveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about intangible assets [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disclosure of detailed information about intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of fair value measurement of equity [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of share-based payment arrangements [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetChangesInNoncashWorkingCapitalItemsToOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net changes in non-cash working capital items:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentPayables_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfFairValuesOfProceedsReceivedAndNetAssetsContributedAtCarryingValueJointVenturesAndGainOnDeconsolidationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The tabular disclosure of fair values of the proceeds received and net assets contributed at carrying value to joint ventures, and gain on deconsolidation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfFairValuesOfProceedsReceivedAndNetAssetsContributedAtCarryingValueJointVenturesAndGainOnDeconsolidationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of Fair Values Of The Proceeds Received And Net Assets Contributed At Carrying Value Joint Ventures, And Gain On Deconsolidation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfFairValuesOfProceedsReceivedAndNetAssetsContributedAtCarryingValueJointVenturesAndGainOnDeconsolidationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of fair values of the proceeds received and net assets contributed at carrying value to the Smackover Lithium, and gain on deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfReconciliationOfSummarisedFinancialInformationOfJointVentureAccountedForUsingEquityMethodToCarryingAmountOfInterestInJointVentureExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of reconciliation of summarised financial information of joint venture accounted for using equity method to carrying amount of interest in joint venture [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfReconciliationOfSummarisedFinancialInformationOfJointVentureAccountedForUsingEquityMethodToCarryingAmountOfInterestInJointVentureExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disclosure of summarized financial information for interest in the Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ContingenciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ContingenciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingencies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ContingenciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued From the Equity Offering Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares issued from the equity offering shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedFromTheEquityOfferingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued from the Equity Offering (in shaes)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareIssueRelatedCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share issue related cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareIssueRelatedCost_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Share issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OwnershipInterestDisposedInitialCashPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of initial cash payment received from the sale of percentage of interest in subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OwnershipInterestDisposedInitialCashPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ownership Interest Disposed, Initial Cash Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OwnershipInterestDisposedInitialCashPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial cash payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AtMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for At the market offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AtMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AtMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AtMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">ATM Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestExpenseOnLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest expense on lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InterestExpenseOnLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest on lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationExpendituresIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of exploration and evaluation expenditures included in accounts payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationExpendituresIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Expenditures Included In Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationExpendituresIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation expenditures included in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsSaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash received on stock transaction after deduction of issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsSaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Sale of Stock, Consideration Received on Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsSaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SllElDoradoSouthLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for SLL El Dorado South LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SllElDoradoSouthLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SLL El Dorado South LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SllElDoradoSouthLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SLL El Dorado South LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gains (losses) on exchange differences on translation of foreign operations, net of tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Currency translation differences of foreign operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Effect of foreign exchange translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_BasisOfPresentationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of events after reporting period [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Exercisable, Options Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number Exercisable, Options Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedPaymentArrangementOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedPaymentArrangementOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ifrs Share-Based Payment Arrangement, Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedPaymentArrangementOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share based payment arrangement, Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedPaymentArrangementOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetSmelterReturnRoyalty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of net smelter return royalty.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetSmelterReturnRoyalty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net smelter return royalty (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetSmelterReturnRoyalty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net smelter return royalty (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of fair value of consideration received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Consideration Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfConsiderationReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Consideration Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAccountsPayableAndAccruedLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments for increase (decrease) in trade accounts payable and accrued liability to reconcile profit (loss) to net cash flow from (used in) operating activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAccountsPayableAndAccruedLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for Increase (Decrease) in Accounts Payable and Accrued liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAccountsPayableAndAccruedLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for East Texas properties (ETX).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">East Texas properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Texas Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of shares, options outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of period (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOutstandingShareOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of Shares, Options Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInJointVenturesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Th tabular disclosure of information pertaining to interests in join venture.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInJointVenturesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Interests In Joint Ventures [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfInterestsInJointVenturesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of information about Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for East Texas properties (ETX).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">East Texas Property [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_EastTexasPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Texas Lithium Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_JointVenturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total for all joint ventures [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_JointVenturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumUsHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Standard Lithium US Holdings LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumUsHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Lithium US Holdings LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumUsHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Standard Lithium US Holdings LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current assets [Default Label]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Non-current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Current Assets And Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other current assets and receivables.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherCurrentAssetsAndReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current assets and receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_ContactPersonnelName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contact Personnel Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for decrease (increase) in trade accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in proceeds from issuance of shares included in accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CapitalAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for capital assets carried forward for use against future taxable profit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CapitalAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CapitalAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReagentsCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for reagents costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ReagentsCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reagents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Statements of Changes in Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInComprehensiveIncomeDueReasonablyPossibleChangeInDesignatedRiskComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of change in comprehensive income (loss) due to reasonably possible increase (decrease) in risk component.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInComprehensiveIncomeDueReasonablyPossibleChangeInDesignatedRiskComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Comprehensive Income Due Reasonably Possible Change in Designated Risk Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInComprehensiveIncomeDueReasonablyPossibleChangeInDesignatedRiskComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IncreaseDecreaseInComprehensiveIncomeDueReasonablyPossibleChangeInDesignatedRiskComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Change in comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net loss for the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current provision for decommissioning, restoration and rehabilitation costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decommissioning provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets arising from exploration for and evaluation of mineral resources</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, period end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, beginning period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LetterOfCreditPayableToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letter Of Credit Payable To Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LetterOfCreditPayableToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Letter of credit payable to related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LetterOfCreditPayableToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of credit payable to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevolvingCreditFacilityObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevolvingCreditFacilityObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revolving credit facility obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevolvingCreditFacilityObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revolving credit facility obligation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashOnHand_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash on hand</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashOnHand_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash on hand</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherCurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherCurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Prepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Prepayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advances and deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFifteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Fifteen [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFifteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range Fifteen.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFifteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.78</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Categories of related parties [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of non-adjusting events after reporting period [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AcquisitionCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AcquisitionCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition Costs [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AcquisitionCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment loss recognised in profit or loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeElevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range eleven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeElevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Eleven [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeElevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.36</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right of use asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right of use asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial assets, at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FinancialAssetsAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax expense (income)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred income tax (benefit) expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred income tax benefit (expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Fourteen [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range fourteen.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1.27</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumPercentageOfAwardsToOutstandingStocks_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The maximum percentage of awards to outstanding stocks in share-based compensation arrangement that can granted.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumPercentageOfAwardsToOutstandingStocks_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation, Maximum Percentage Of Awards To Outstanding Stocks</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumPercentageOfAwardsToOutstandingStocks_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum awards as percentage to outstanding stocks</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortisation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetOperatingLossUtilizationLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Operating Loss Utilization Limitation Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetOperatingLossUtilizationLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net operating loss utilization limitation percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NetOperatingLossUtilizationLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss utilization limitation percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of significant components of the deferred tax assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnrestrictedCashOnHand_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrestricted cash on hand</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnrestrictedCashOnHand_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unrestricted cash on hand.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnrestrictedCashOnHand_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrestricted cash on hand</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of financial assets [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_JointVentureCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Joint venture capital contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_JointVentureCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Joint venture capital contributions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_JointVentureCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Joint Venture capital contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountsPayableRelatedToCashCollateralizedLetterOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amounts Payable Related to Cash Collateralized Letter of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountsPayableRelatedToCashCollateralizedLetterOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amounts payable related to cash collateralized letter of credit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AmountsPayableRelatedToCashCollateralizedLetterOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amounts payable related to cash collateralized letter of credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ranges of exercise prices for outstanding share options [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="currency_AllCurrenciesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">All Currencies [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock issued during period value vesting of deferred stock unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value vesting of deferred stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodValueVestingOfDeferredStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of DSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCashInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Cash Investing Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCashInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non cash investing activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCashInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash investing and financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock price on date of grant (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Grant price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BenefitsPaidOrPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Separation benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BenefitsPaidOrPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Benefits paid or payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BenefitsPaidOrPayable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Benefits paid or payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MajorPurchaseOfLithiumCarbonateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Major Purchase of Lithium Carbonate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MajorPurchaseOfLithiumCarbonateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Major purchase of lithium carbonate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_MajorPurchaseOfLithiumCarbonateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Major Purchase of Lithium Carbonate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transfers out of Level 3 of fair value hierarchy, assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers out of Level 3 of fair value hierarchy, assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options, Outstanding, Weighted Average Exercise Price [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OptionsOutstandingWeightedAverageExercisePriceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of number and weighted average remaining contractual life of outstanding share options [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfCapitalManagement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure Of Capital Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfCapitalManagement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Capital Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfCapitalManagement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfZeroPointNineNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Price of Zero Point Nine Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfZeroPointNineNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exercise Price of $ 0.99.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfZeroPointNineNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price of $0.99</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwrittenPublicOfferingExercisablePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwritten public offering exercisable period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwrittenPublicOfferingExercisablePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwritten public offering exercisable period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwrittenPublicOfferingExercisablePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwritten public offering exercisable period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of number and weighted average exercise prices of other equity instruments [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of RSU and DSU Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrencyRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Currency risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsPlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Plan name for share-based payment arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsPlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AccuredCompensationPayableToManagementAndDirectorsRealtedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation payable to management and directors related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AccuredCompensationPayableToManagementAndDirectorsRealtedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accured Compensation Payable to Management and Directors Realted Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AccuredCompensationPayableToManagementAndDirectorsRealtedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued compensation payable to management and directors related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommitmentReceivedToInvestOnDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The commitment received to invest on development costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommitmentReceivedToInvestOnDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitment Received To Invest On Development Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommitmentReceivedToInvestOnDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment received to invest on development costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfRelatedPartyExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carrying amount, accumulated depreciation, amortization and impairment and gross carrying amount [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying amount, accumulated depreciation, amortization and impairment and gross carrying amount [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ManagementAndDirectorsFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management And Directors Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ManagementAndDirectorsFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Management and directors fee expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ManagementAndDirectorsFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management and directors' fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsGrantedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of share options granted in a share-based payment arrangements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsGrantedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Share Options Granted In Share Based Payment Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsGrantedInShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options granted (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIssuedCapitalExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of issued capital [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIssuedCapitalExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Explanation of effect of share-based payments on entity's profit or loss [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Share-based Compensation Recorded for Each Type of Award</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfRoyaltyOfGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Royalty of Gross Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfRoyaltyOfGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of royalty of gross revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfRoyaltyOfGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of royalty of gross revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherShareIssuancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Share Issuances [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherShareIssuancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other share issuances.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_OtherShareIssuancesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Share Issuances</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification adjustments on exchange differences on translation of foreign operations, net of tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationNetOfTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Currency translation differences reclassified to net income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Capital Abstract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of financial assets [abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeconsolidationOfSubsidiariesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for deconsolidation of subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeconsolidationOfSubsidiariesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation of Subsidiaries [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeconsolidationOfSubsidiariesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation of Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for financial asset - FID.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Asset - FID [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial asset - FID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommercialPlantEvaluationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Commercial plant evaluation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommercialPlantEvaluationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Plant Evaluation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CommercialPlantEvaluationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Plant Evaluation (Lanxess 1A)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CounterpartiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparties [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of fair value measurement of equity [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts payable and accrued liabilities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortisation - intangible asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForAmortisationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxLiabilityAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred tax liability (asset)</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DeferredTaxLiabilityAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AggregateDeferredTaxAssetsNotRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of total deferred tax assets not recognized at reporting date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AggregateDeferredTaxAssetsNotRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Deferred Tax Assets Not Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AggregateDeferredTaxAssetsNotRecognized_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unrecognized deferred tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfNatureOfOperationsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of the nature of operations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfNatureOfOperationsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Nature Of Operations Explanatory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfNatureOfOperationsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nature of Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsFromSaleOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsFromSaleOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from sale of shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsFromSaleOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuing shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_Lanxess1AProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lanxess 1A Project [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_Lanxess1AProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lanxess 1A project.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_Lanxess1AProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lanxess 1A Project</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expense arising from exploration for and evaluation of mineral resources</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockMaximumCapitalReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate amount of shares reserved for future issuance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockMaximumCapitalReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock, Maximum Capital Reserved for Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockMaximumCapitalReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockMaximumCapitalReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign exchange gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Foreign exchange loss (gain)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiry period (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for financial instruments [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Financial instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Statements of Comprehensive Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Statements of Financial Position</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Sixteen [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Range Sixteen.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeSixteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2.92</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for Standard Lithium subsidiaries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Lithium Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StandardLithiumSubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Standard Lithium subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CurrentAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">4.94</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of DSUs To Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of DSUs to common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of DSUs to common shares (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of stock units, Conversion of DSUs to common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of stock units, Conversion of DSUs to common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of share options granted in share-based payment arrangement (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options granted (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccountingProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccountingProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net (loss) income before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfEquityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of equity [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfExplorationAndEvaluationAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and Evaluation Expenditures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfExplorationAndEvaluationAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and Evaluation Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BasicEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basic loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_BasicEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic (loss) earnings per share (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfAssetsAndLiabilitiesExposedToCurrencyRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of assets and liabilities exposed to currency risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfAssetsAndLiabilitiesExposedToCurrencyRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assets and Liabilities Exposed to Currency Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DemonstrationPlantOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of demonstration plant operations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DemonstrationPlantOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Demonstration Plant Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DemonstrationPlantOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demonstration Plant operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AverageForeignExchangeRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Average rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AverageForeignExchangeRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Average foreign exchange rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">6.52</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Attribution of expenses by nature to their function [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsEvaluationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The addition too evaluation costs on exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsEvaluationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets, Evaluation Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsEvaluationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lanxess 1A evaluation costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for property, plant and equipment [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment ("PP&amp;E")</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The maximum shares to be issued in a share-based compensation arrangement, as percentage outstanding shares when combined with the aggregate number of options, restricted stock units (RSU), performance share units (PSU) and deferred share units (DSU).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-based Compensation, Maximum Shares To Be Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate number of common shares to be issued, as a percent of outstanding common shares at any time when combined with the aggregate number of Option, RSU, PSU and DSU</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LanxessPropertyProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lanxess Property Project [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LanxessPropertyProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lanxess property project.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LanxessPropertyProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lanxess Property Project</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of effect of changes in foreign exchange rates [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Exchange Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments accounted for using equity method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning, Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending, Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total investments accounted for using equity method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_InvestmentAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying amount of investment in Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average number of ordinary shares used in calculating basic earnings per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of common shares outstanding - Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current receivables due from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MiningPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mining property [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MiningPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demonstration Plant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Telescope [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Telescope.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TelescopeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Telescope</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (decrease) in cash and cash equivalents after effect of exchange rate changes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net change in cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for impairment of financial assets [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Level 3 of fair value hierarchy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of temporary difference, unused tax losses and unused tax credits [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current liabilities [abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of other equity instruments forfeited in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwritersOptionToPurchaseUpToAdditionalSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriters option to purchase up to additional shares [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwritersOptionToPurchaseUpToAdditionalSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriters option to purchase up to additional shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_UnderwritersOptionToPurchaseUpToAdditionalSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriters Option to Purchase Up to Additional Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GrossCarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross carrying amount [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GrossCarryingAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of RSUs, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments exercised or vested in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of stock units, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WarrantsExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Per share exercise price of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WarrantsExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WarrantsExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssuingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from issuing shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ProceedsFromIssuingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CANADA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAtTheMarketProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current ATM Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAtTheMarketProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current At The Market Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAtTheMarketProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Current At The Market Program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Options exercised (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options exercised (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">4.78</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DemonstrationPlantAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DemonstrationPlantAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Demonstration Plant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PurchaseOfIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash outflow for the purchase of intangible assets other than goodwill.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PurchaseOfIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of intangible assets other than goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PurchaseOfIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Patent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SouthWestArkansasProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for the South West Arkansas Project.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SouthWestArkansasProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">South West Arkansas Project</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SouthWestArkansasProjectMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SWA Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Item that may be reclassified subsequently to income or loss:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfSharebasedCompensationRecordedForEachTypeOfAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Sharebased Compensation Recorded For Each Type Of Award Table</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfSharebasedCompensationRecordedForEachTypeOfAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of sharebased compensation recorded for each type of award.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CounterpartiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparties [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LIABILITIES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of intangible assets [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for income tax [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Smackover Lithium Capital Contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Smackover Lithium capital contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Smackover Lithium capital contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumCapitalContributions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Smackover Lithium capital contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of changes in equity [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Statements of Changes in Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, plant and equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfSignificantAccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfSignificantAccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Material Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LeaseLiabilitiesEffectOfMovementInForeignExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of lease liabilities effect of movement in foreign exchange rates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LeaseLiabilitiesEffectOfMovementInForeignExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liabilities Effect Of Movement In Foreign Exchange Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_LeaseLiabilitiesEffectOfMovementInForeignExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of movement in foreign exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Vesting Of Restricted Stock Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares vesting of restricted stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted stock units (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of the components of income tax expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IFRS Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of reconciliation income tax allowance and the amount resulting from the application of the combined Canadian income tax rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_BasisOfPreparationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis Of Preparation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_BasisOfPreparationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Basis Of Preparation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WorkingCapitalSurplus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Working capital surplus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WorkingCapitalSurplus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAdvancesAndDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments for increase (decrease) in advances and deposit to reconcile profit (loss) to net cash flow from (used in) operating activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAdvancesAndDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments For Increase Decrease in Advances and Deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsForIncreaseDecreaseInAdvancesAndDeposits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advances and deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FixturesAndFittingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fixtures and fittings [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_FixturesAndFittingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture and fixtures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageFairValueOfOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The weighted average fair value of options granted.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageFairValueOfOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Fair Value Of Options Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageFairValueOfOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average fair value of options granted (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_WeightedAverageFairValueOfOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average fair value of options granted (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherAdjustmentsToReconcileProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherAdjustmentsToReconcileProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other adjustments to reconcile profit (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Presentation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of share options expired in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options expired (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationRightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DepreciationRightofuseAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortisation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Elected Not To Use the Extended Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for investments in joint ventures [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForInvestmentsInJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments in joint ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherExpenseByFunction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherExpenseByFunction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other expense, by function</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_OtherExpenseByFunction_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Other expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of non-capital loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Capital Loss Carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NonCapitalLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net deferred income tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeconsolidationOfSubsidiariesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeconsolidationOfSubsidiariesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation of Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevisedFairValueOfInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revised Fair Value Of Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevisedFairValueOfInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revised fair value of investment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RevisedFairValueOfInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated depreciation and amortisation [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SummaryOfFinancialInstrumentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The tabular disclosure of summary of financial instruments under IFRS 9.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SummaryOfFinancialInstrumentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Financial Instruments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SummaryOfFinancialInstrumentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of financial instruments under IFRS 9</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation, short-term employee benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management and director fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AddressTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Address Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SHAREHOLDERS' EQUITY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsFromAt-The-MarketEquityProgram_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from at-the-market equity program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ProceedsFromAt-The-MarketEquityProgram_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from at-the-market equity program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of intangible assets other than goodwill [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration and Evaluation Costs [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationCostsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and Evaluation:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about intangible assets [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of investments other than investments accounted for using equity method [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL ASSETS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAccountsPayablesToJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of current accounts payables due to joint ventures.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAccountsPayablesToJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Accounts Payables To Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAccountsPayablesToJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable - unconsolidated affiliates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CurrentAccountsPayablesToJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts payable - Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for unrealised foreign exchange losses (gains)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized foreign exchange loss (gain)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressesAddressTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Addresses, Address Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of other equity instruments outstanding in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of awards granted as of reporting date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of stock units, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of stock units, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RepairsAndMaintenanceCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repairs and maintenance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RepairsAndMaintenanceCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for repairs and maintenance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TangibleExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tangible Exploration And Evaluation Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TangibleExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TangibleExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsWillVestInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Share Options will Vest in Share-Based Payment Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsWillVestInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of share options will vest in share-based payment arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfShareOptionsWillVestInShareBasedPaymentArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options will vest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of transactions between related parties [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Related Party Receivables and Payables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transfers into Level 3 of fair value hierarchy, assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers into Level 3 of fair value hierarchy, assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfOwnershipInterestDisposedInEachEntity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of ownership interest disposed in each entity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfOwnershipInterestDisposedInEachEntity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Ownership Interest Disposed in Each Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PercentageOfOwnershipInterestDisposedInEachEntity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of ownership interest disposed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade and other current receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total trade and other current receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ComponentsOfEquityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of equity [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Types of share-based payment arrangements [axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAdditionalInformationAboutLeasingActivitiesForLesseeExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of additional information about leasing activities for lessee [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAdditionalInformationAboutLeasingActivitiesForLesseeExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of changes in lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets Acquisitions Costs Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exploration and evaluation assets acquisitions costs impairment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsImpairment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Smackover Lithium [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Smackover Lithium.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfCommonSharesIssuedForExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of common shares issued for exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfCommonSharesIssuedForExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value of common shares issued for exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FairValueOfCommonSharesIssuedForExplorationAndEvaluationAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued for exploration and evaluation assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of financial instruments [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments and Financial Risk Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Decrease through loss of control of subsidiary, property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfJointVenturesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of joint ventures [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfJointVenturesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Method Investment in Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of share options outstanding in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of period (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period (in USD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for investment in joint venture.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment in Joint Venture [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in joint ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxIncomeAndLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax income and loss). [Refer: Accounting profit]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxIncomeAndLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect of expense not deductible in determining taxable profit (tax income and loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxIncomeAndLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-deductible items and other differences</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustedWeightedAverageShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average number of ordinary shares used in calculating diluted earnings per share</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RightOfUseAssetsEffectOfMovementInForeignExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of movement in foreign exchange rates</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DilutedEarningsLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted (loss) earnings per share (in USD per share)</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConsiderationForServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consideration for services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConsiderationForServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consideration For Services [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConsiderationForServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Consideration for services.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_StatementOfChangesInEquityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of changes in equity [table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Financial asset - FID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AnnualInformationForm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Annual Information Form</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of financial assets [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFinancialAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The acquisition costs of Wheelhouse Water Resources on exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exploration And Evaluation Assets Acquisitions Costs Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition of Wheelhouse Water Resources, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Acquisition costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_Equity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL SHAREHOLDERS' EQUITY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxisResearchAndDevelopmentTaxCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for research and development tax credit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxisResearchAndDevelopmentTaxCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Difference Unused Tax Losses And Unused Tax Credits Axis Research And Development Tax Credit Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxisResearchAndDevelopmentTaxCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development tax credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfKeyManagementPersonnelCompensationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of compensation to key management</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Classes of property, plant and equipment [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SwaLithiumHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SWA Lithium Holdings LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SwaLithiumHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SWA Lithium Holdings LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SwaLithiumHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SWA Lithium Holdings LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average exercise price of other equity instruments exercised or vested in share-based payment arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CarbonCaptureExpenditureIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of carbon capture expenditures included in accounts payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CarbonCaptureExpenditureIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carbon Capture Expenditure Included In Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CarbonCaptureExpenditureIncludedInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aqualung Carbon Capture expenditure included in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConstructionInProgressAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in progress, Aqualung [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConstructionInProgressAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction in progress, Aqualung [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConstructionInProgressAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TestworkCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for testwork costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TestworkCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Testwork</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TestworkCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Test work</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expense from share-based payment transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained earnings (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RetainedEarnings_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The deemed price per share to be issued for settlement of advisory fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deemed Price Per Share To Be Issued For Settlement Of Advisory Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deemed price advisory share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deemed price per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of attribution of expenses by nature to their function [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demonstration plant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of Stock option transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Option Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_DisclosureOfExplorationAndEvaluationAssetTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of exploration and evaluation asset</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about property, plant and equipment [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disclosure of detailed information about property, plant and equipment [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TrafiguraTradingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trafigura trading LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TrafiguraTradingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trafigura Trading LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of property, plant and equipment, classified as investing activities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Warrants Outstanding Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, at beginning of period (in CAD per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareIssueCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for share issue costs that have been incurred and are carried forward for use against future taxable profit</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ShareIssueCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NoncurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-current liabilities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_GainLossOnCessationOfConsolidationOfSubsidiariesDueToChangeOfInvestmentEntityStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on deconsolidation of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Key management personnel compensation, share-based payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfForeignExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect of foreign exchange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfForeignExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tax effect of foreign exchange.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectOfForeignExchange_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign exchange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2.66</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-adjusting events after reporting period [domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfEightPointSixSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exercise price of $ 8.67.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfEightPointSixSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Price of $8.67 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExercisePriceOfEightPointSixSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price of $8.67</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ContingenciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">N/A</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ContingenciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected stock price volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected stock price volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Country</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCostsForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The foreign exchange effect of acquisition costs on exploration and evaluation assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCostsForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of movement in foreign exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCostsForeignExchangeEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of foreign exchange translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsToShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of adjustments to share of net assets of joint ventures accounted for using the equity method.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsToShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Share of Net Assets Of Joint Ventures Accounted For Using Equity Method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_AdjustmentsToShareOfNetAssetsOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to the Company's share of net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold improvements [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold improvements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PartialSaleOfSubsidiariesMaximumInvestmentByPurchaser_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The maximum amount of investment the buyer of partial sale of subsidiaries is committed to invest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PartialSaleOfSubsidiariesMaximumInvestmentByPurchaser_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Partial Sale of Subsidiaries, Maximum Investment By Purchaser</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_PartialSaleOfSubsidiariesMaximumInvestmentByPurchaser_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum amount purchaser of partial sale of subsidiaries committed to invest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FundingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Funding commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FundingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Funding commitments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FundingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Funding commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectFromChangeInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in unrecognized tax benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectFromChangeInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect from change in unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_TaxEffectFromChangeInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of detailed information about intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of carrying value of the intangible assets acquired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityPrimarySicNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Primary SIC Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of fair value measurement of equity [abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDeferredTaxExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments for deferred tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_AdjustmentsForDeferredTaxExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax (benefit) expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RevenueFromGovernmentGrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income from government grants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_RevenueFromGovernmentGrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government grants finalized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedForEvaluationExplorationAssetsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued for Evaluation Exploration Assets Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_SharesIssuedForEvaluationExplorationAssetsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued for exploration and evaluation assets (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_MajorComponentsOfTaxExpenseIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of subsidiaries [line items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Capital Management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of transactions between related parties [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_JointVenturesWhereEntityIsVenturerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_JointVenturesWhereEntityIsVenturerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Joint ventures where entity is venturer [member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxEffectOfForeignTaxRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax effect of foreign tax rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_TaxEffectOfForeignTaxRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Differences in tax rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of quantitative information about right-of-use assets [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of changes in right of use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_PresentationOfLeasesForLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rights of use asset and lease liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for California Property.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaPropertyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">California property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToEtxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for financial asset - FID in relation to ETX.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToEtxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Asset - FID In Relation To ETX [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_FinancialAssetFidInRelationToEtxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ETX</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_IssuedCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GrantedToCorporationControlledByOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Granted to Corporation Controlled by Officer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GrantedToCorporationControlledByOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Granted to corporation controlled by officer member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_GrantedToCorporationControlledByOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Granted to Corporation Controlled By Officer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaLithiumLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">California Lithium Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaLithiumLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">California Lithium Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_CaliforniaLithiumLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for California Lithium Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted average contractual life warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted Average Remaining Contractual Life, Options Outstanding (Year)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in Aqualung</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment In Aqualung [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInAqualungMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment in aqualung.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of accounting policy for intangible assets other than goodwill [text block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure of attribution of expenses by nature to their function [table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">This member stands for range five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Range Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_RangeFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">7.45</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Opinion [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of warrants outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Warrants Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of period (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_NumberOfWarrantsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of DSUs To Common Shares Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion of DSUs to common shares value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_ConversionOfDSUsToCommonSharesValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of DSUs to common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInSmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment In Smackover Lithium [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInSmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment in smackover lithium.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001537137_InvestmentInSmackoverLithiumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in Smackover Lithium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share of profit (loss) of joint ventures accounted for using equity method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ifrs-full_ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss from investment in joint ventures</link:label>
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  <xsd:element id="ck0001537137_ExpectedToPurchaseMaximumOfLithiumCarbonatePerYear" name="ExpectedToPurchaseMaximumOfLithiumCarbonatePerYear" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_UnderwrittenPublicOfferingExercisablePeriod" name="UnderwrittenPublicOfferingExercisablePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_OtherShareIssuancesMember" name="OtherShareIssuancesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IfrsRelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" name="IfrsRelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_ShareIssueCostsMember" name="ShareIssueCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfPatentsNoticesOfAllowancesReceived" name="NumberOfPatentsNoticesOfAllowancesReceived" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ArkansasLithiumLlcMember" name="ArkansasLithiumLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfWarrantsIssuedDuringPeriod" name="NumberOfWarrantsIssuedDuringPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_MasterServicesAgreementMember" name="MasterServicesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_DisclosureOfKeyManagementPersonnelCompensationTextBlock" name="DisclosureOfKeyManagementPersonnelCompensationTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DeferredShareUnitsMember" name="DeferredShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ProceedsFromAt-The-MarketEquityProgram" name="ProceedsFromAt-The-MarketEquityProgram" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DemonstrationPlantAbstract" name="DemonstrationPlantAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SharesIssuedForEvaluationExplorationAssetsShares" name="SharesIssuedForEvaluationExplorationAssetsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ProceedsFromSaleOfShares" name="ProceedsFromSaleOfShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_WarrantsExercisePrice" name="WarrantsExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" name="IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DescriptionOfAccountingPolicyForChangesInAccountingStandardsTextBlock" name="DescriptionOfAccountingPolicyForChangesInAccountingStandardsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_AmountOfMilestonePaymentsToReceive" name="AmountOfMilestonePaymentsToReceive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_SWALithiumFinancingLLCMember" name="SWALithiumFinancingLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_EventsAfterReportingPeriodMember" name="EventsAfterReportingPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TaxEffectFromChangeInUnrecognizedTaxBenefits" name="TaxEffectFromChangeInUnrecognizedTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_RangeSixMember" name="RangeSixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_OptionsMember" name="OptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SmackoverLithiumCapitalContributions" name="SmackoverLithiumCapitalContributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_AtMarketOfferingMember" name="AtMarketOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_RangeElevenMember" name="RangeElevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SwaLithiumHoldingsLlcMember" name="SwaLithiumHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IfrsPlanNameAxis" name="IfrsPlanNameAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfWarrantsOutstanding" name="NumberOfWarrantsOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DisclosureOfInterestsInJointVenturesTableTextBlock" name="DisclosureOfInterestsInJointVenturesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_RangeTwoMember" name="RangeTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationAssetsDeconsolidation" name="ExplorationAndEvaluationAssetsDeconsolidation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_InvestmentInAqualungMember" name="InvestmentInAqualungMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxIncomeAndLoss" name="TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxIncomeAndLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationAssetsAbstract" name="ExplorationAndEvaluationAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_JointVentureCapitalContributions" name="JointVentureCapitalContributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_NetOperatingLossUtilizationLimitationPercentage" name="NetOperatingLossUtilizationLimitationPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionCostsForeignExchangeEffect" name="ExplorationAndEvaluationAssetsAcquisitionCostsForeignExchangeEffect" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DisclosureOfAssetsAndLiabilitiesExposedToCurrencyRisk" name="DisclosureOfAssetsAndLiabilitiesExposedToCurrencyRisk" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_EastTexasPropertiesMember" name="EastTexasPropertiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TestworkCostsMember" name="TestworkCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SuppliesCostMember" name="SuppliesCostMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_OtherCurrentAssetsAndReceivables" name="OtherCurrentAssetsAndReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DisclosureOfInterestsInSmackoverLithiumTableTextBlock" name="DisclosureOfInterestsInSmackoverLithiumTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_CaliforniaPropertiesMember" name="CaliforniaPropertiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TexasLithiumFinancingLLCMember" name="TexasLithiumFinancingLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_UnrestrictedCashOnHand" name="UnrestrictedCashOnHand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_PreviousAtTheMarketOfferingMember" name="PreviousAtTheMarketOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_InvestmentInJointVentureMember" name="InvestmentInJointVentureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_AdjustmentsForIncreaseDecreaseInAccountsPayableAndAccruedLiability" name="AdjustmentsForIncreaseDecreaseInAccountsPayableAndAccruedLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_FinancialAssetFidMember" name="FinancialAssetFidMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_AmountsPayableRelatedToCashCollateralizedLetterOfCredit" name="AmountsPayableRelatedToCashCollateralizedLetterOfCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_PurchaseOfIntangibleAssetsOtherThanGoodwill" name="PurchaseOfIntangibleAssetsOtherThanGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_OtherMember" name="OtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfWarrantsOutstandingWeightedAverageExercisePrice" name="NumberOfWarrantsOutstandingWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_CarbonCaptureExpenditureIncludedInAccountsPayable" name="CarbonCaptureExpenditureIncludedInAccountsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_KeyManagementPersonnelCompensationSeparationBenefits" name="KeyManagementPersonnelCompensationSeparationBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_IfrsRelatedPartyTransactionDomain" name="IfrsRelatedPartyTransactionDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_InvestmentAbstract" name="InvestmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_AdvisoryFeesToBeSettledInShares" name="AdvisoryFeesToBeSettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_FundingCommitments" name="FundingCommitments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_ReclassifiedFromReserveToShareCapital" name="ReclassifiedFromReserveToShareCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_AgreementWithArmsLengthThirdPartyAdvisorMember" name="AgreementWithArmsLengthThirdPartyAdvisorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxisResearchAndDevelopmentTaxCreditMember" name="TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxisResearchAndDevelopmentTaxCreditMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_CaliforniaPropertyMember" name="CaliforniaPropertyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_RightOfUseAssetsEffectOfMovementInForeignExchange" name="RightOfUseAssetsEffectOfMovementInForeignExchange" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_OwnershipInterestDisposedInitialCashPaymentReceived" name="OwnershipInterestDisposedInitialCashPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_ReclamationDepositNoncurrent" name="ReclamationDepositNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_IncreaseDecreaseInNumberOfSharesOutstandingThroughStockOptionsExercised" name="IncreaseDecreaseInNumberOfSharesOutstandingThroughStockOptionsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_NonCapitalLossCarryforwardsIndefinite" name="NonCapitalLossCarryforwardsIndefinite" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_EquinorMember" name="EquinorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_StockMaximumCapitalReservedForFutureIssuance" name="StockMaximumCapitalReservedForFutureIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_BasisOfPresentationAbstract" name="BasisOfPresentationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_LetterOfCreditPayableToRelatedParties" name="LetterOfCreditPayableToRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_StandardLithiumSubsidiariesMember" name="StandardLithiumSubsidiariesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_DisclosureOfDemonstrationPlantExplanatory" name="DisclosureOfDemonstrationPlantExplanatory" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_PlantOperatingExpense" name="PlantOperatingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_NumberOfShareOptionsModifiedInShareBasedPaymentArrangements" name="NumberOfShareOptionsModifiedInShareBasedPaymentArrangements" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_TaxLossesResearchAndDevelopmentTaxCreditAndOtherTemporaryDifferencesMember" name="TaxLossesResearchAndDevelopmentTaxCreditAndOtherTemporaryDifferencesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_BasisOfPreparationAbstract" name="BasisOfPreparationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TransitionReport" name="TransitionReport" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees" name="DeemedPricePerShareToBeIssuedForSettlementOfAdvisoryFees" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_NoncashInvestingFinancingAndFinancingSupplementalDisclosureTextBlock" name="NoncashInvestingFinancingAndFinancingSupplementalDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_GrantedToCorporationControlledByOfficerMember" name="GrantedToCorporationControlledByOfficerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_PersonnelCostsMember" name="PersonnelCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_FinancialInstrumentsAndFinancialRiskManagementAbstract" name="FinancialInstrumentsAndFinancialRiskManagementAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_PartialSaleOfSubsidiariesMaximumInvestmentByPurchaser" name="PartialSaleOfSubsidiariesMaximumInvestmentByPurchaser" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_TelescopeMember" name="TelescopeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_PercentageOfReasonablyPossibleChangeInRiskAssumption" name="PercentageOfReasonablyPossibleChangeInRiskAssumption" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_RangeSevenMember" name="RangeSevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_RangeTenMember" name="RangeTenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_DisclosureCapitalManagementAbstract" name="DisclosureCapitalManagementAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ConversionOfDSUsToCommonShares" name="ConversionOfDSUsToCommonShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_WeightedAverageFairValueOfOptionsGranted" name="WeightedAverageFairValueOfOptionsGranted" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_PercentageOfOwnershipInterestRetainedInEachEntity" name="PercentageOfOwnershipInterestRetainedInEachEntity" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_CommercialPlantEvaluationMember" name="CommercialPlantEvaluationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" name="IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_GrossAndNetProceedsFromSaleOfShares" name="GrossAndNetProceedsFromSaleOfShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_TexasLithiumCorpMember" name="TexasLithiumCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SouthWestArkansasProjectMember" name="SouthWestArkansasProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_CapitalContributions" name="CapitalContributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_DeconsolidationOfSubsidiariesAbstract" name="DeconsolidationOfSubsidiariesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_EquityOfferingMember" name="EquityOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsOptionPayments" name="ExplorationAndEvaluationAssetsAcquisitionsCostsOptionPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_NetSmelterReturnRoyalty" name="NetSmelterReturnRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DemonstrationPlantOperations" name="DemonstrationPlantOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_ConsiderationForServicesMember" name="ConsiderationForServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_FinancialAssetFidInRelationToEtxMember" name="FinancialAssetFidInRelationToEtxMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IntellectualPropertyRightsMember" name="IntellectualPropertyRightsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ChangeInCurrentLiabilitiesRelatingToExplorationAndEvaluationAssets" name="ChangeInCurrentLiabilitiesRelatingToExplorationAndEvaluationAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_PercentageOfOwnershipInterestDisposedInEachEntity" name="PercentageOfOwnershipInterestDisposedInEachEntity" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_WorkingCapitalSurplus" name="WorkingCapitalSurplus" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_RangeFourteenMember" name="RangeFourteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IfrsStatementLineItems" name="IfrsStatementLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ConversionOfDSUsToCommonSharesValue" name="ConversionOfDSUsToCommonSharesValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_AdjustmentsForIncreaseDecreaseInAdvancesAndDeposits" name="AdjustmentsForIncreaseDecreaseInAdvancesAndDeposits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_IncreaseDecreaseInDecommissioningProvision" name="IncreaseDecreaseInDecommissioningProvision" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_RevisedFairValueOfInvestment" name="RevisedFairValueOfInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_NonCashInvestingActivitiesAbstract" name="NonCashInvestingActivitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_ProceedsReceivedFromEquinor" name="ProceedsReceivedFromEquinor" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_IfrsNoncashInvestingAndFinancingItemsAbstract" name="IfrsNoncashInvestingAndFinancingItemsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_IfrsRelatedPartyTransactionAxis" name="IfrsRelatedPartyTransactionAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnit" name="StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnit" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DisclosureOfCapitalManagement" name="DisclosureOfCapitalManagement" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ShareBasedCompensationMaximumSharesToBeIssued" name="ShareBasedCompensationMaximumSharesToBeIssued" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ExpectedToPurchaseOfLithiumCarbonateTerm" name="ExpectedToPurchaseOfLithiumCarbonateTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ReagentsCostsMember" name="ReagentsCostsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_StockIssuedDuringPeriodSharesVestingOfDeferredStockUnit" name="StockIssuedDuringPeriodSharesVestingOfDeferredStockUnit" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_DisclosureOfDetailedInformationAboutPlantOperationsCostsExplanatory" name="DisclosureOfDetailedInformationAboutPlantOperationsCostsExplanatory" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_StockIssuedDuringPeriodValueVestingOfDeferredStockUnit" name="StockIssuedDuringPeriodValueVestingOfDeferredStockUnit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DisclosureOfSharebasedCompensationRecordedForEachTypeOfAwardTable" name="DisclosureOfSharebasedCompensationRecordedForEachTypeOfAwardTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_SaleOfStockAveragePricePerShare" name="SaleOfStockAveragePricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_NonCapitalLossCarryforwardsExpiring" name="NonCapitalLossCarryforwardsExpiring" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_CommitmentReceivedToInvestOnDevelopmentCosts" name="CommitmentReceivedToInvestOnDevelopmentCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_ScheduleOfInvestmentTableTextBlock" name="ScheduleOfInvestmentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_InvestmentInSmackoverLithiumMember" name="InvestmentInSmackoverLithiumMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_UnderwritersOptionToPurchaseUpToAdditionalSharesMember" name="UnderwritersOptionToPurchaseUpToAdditionalSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_DisclosureOfExplorationAndEvaluationAssetTextBlock" name="DisclosureOfExplorationAndEvaluationAssetTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_SaleOfStockAxis" name="SaleOfStockAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_FinancialAssetFidInRelationToSwaMember" name="FinancialAssetFidInRelationToSwaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfShareOptionsVestedInShareBasedPaymentArrangement" name="NumberOfShareOptionsVestedInShareBasedPaymentArrangement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_IfrsPlanNameDomain" name="IfrsPlanNameDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_RangeSixteenMember" name="RangeSixteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_RangeNineMember" name="RangeNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_NumberOfSharesToBeIssuedForSettlementOfAdvisoryFees" name="NumberOfSharesToBeIssuedForSettlementOfAdvisoryFees" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationAssetsAcquisitionsCostsImpairment" name="ExplorationAndEvaluationAssetsAcquisitionsCostsImpairment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DisclosureOfSignificantAccountingPoliciesAbstract" name="DisclosureOfSignificantAccountingPoliciesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_StandardLithiumUsHoldingsLlcMember" name="StandardLithiumUsHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" name="DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_RangeFourMember" name="RangeFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001537137_TaxEffectOfForeignExchange" name="TaxEffectOfForeignExchange" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001537137_DisclosureOfNatureOfOperationsExplanatory" name="DisclosureOfNatureOfOperationsExplanatory" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_NonCapitalLossCarryforwards" name="NonCapitalLossCarryforwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_SharesIssuedForEvaluationExplorationAssets" name="SharesIssuedForEvaluationExplorationAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_ExplorationAndEvaluationExpendituresIncludedInAccountsPayable" name="ExplorationAndEvaluationExpendituresIncludedInAccountsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001537137_ShareBasedCompensationMaximumPercentageOfAwardsToOutstandingStocks" name="ShareBasedCompensationMaximumPercentageOfAwardsToOutstandingStocks" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001537137_RangeThirteenMember" name="RangeThirteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
