<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  10.3.0.9 -->
<!--Based on XBRL 2.1-->
<!--Created on: 8/14/2023 9:00:45 PM-->
<!--Modified on: 8/14/2023 9:00:45 PM-->
<xsd:schema targetNamespace="http://tmc.com/20230630" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:srt-types="http://fasb.org/srt-types/2023" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:currency="http://xbrl.sec.gov/currency/2023" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:sic="http://xbrl.sec.gov/sic/2023" xmlns:stpr="http://xbrl.sec.gov/stpr/2023" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2023" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-roles="http://fasb.org/us-roles/2023" xmlns:naics="http://xbrl.sec.gov/naics/2023" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:srt="http://fasb.org/srt/2023" xmlns:exch="http://xbrl.sec.gov/exch/2023" xmlns:attributeFormDefault="unqualified" xmlns:srt-roles="http://fasb.org/srt-roles/2023" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:tmc="http://tmc.com/20230630">
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://tmc.com/role/StatementCondensedConsolidatedBalanceSheets" id="StatementCondensedConsolidatedBalanceSheets">
        <link:definition>00100 - Statement - Condensed Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/StatementCondensedConsolidatedStatementsOfLossAndComprehensiveLoss" id="StatementCondensedConsolidatedStatementsOfLossAndComprehensiveLoss">
        <link:definition>00200 - Statement - Condensed Consolidated Statements of Loss and Comprehensive Loss</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" id="StatementCondensedConsolidatedStatementsOfCashFlows">
        <link:definition>00400 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureExplorationAndEvaluationExpensesDetails" id="DisclosureExplorationAndEvaluationExpensesDetails">
        <link:definition>40701 - Disclosure - Exploration and Evaluation Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>00090 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/StatementCondensedConsolidatedBalanceSheetsParentheticals" id="StatementCondensedConsolidatedBalanceSheetsParentheticals">
        <link:definition>00105 - Statement - Condensed Consolidated Balance Sheets (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/StatementCondensedConsolidatedStatementsOfChangesInEquity" id="StatementCondensedConsolidatedStatementsOfChangesInEquity">
        <link:definition>00300 - Statement - Condensed Consolidated Statements of Changes in Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureShareBasedCompensation" id="DisclosureShareBasedCompensation">
        <link:definition>10901 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureBasisOfPresentationPolicies" id="DisclosureBasisOfPresentationPolicies">
        <link:definition>20202 - Disclosure - Basis of Presentation (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureExplorationAndEvaluationExpensesTables" id="DisclosureExplorationAndEvaluationExpensesTables">
        <link:definition>30703 - Disclosure - Exploration and Evaluation Expenses (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureShareBasedCompensationTables" id="DisclosureShareBasedCompensationTables">
        <link:definition>30903 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureNatureOfOperationsDetails" id="DisclosureNatureOfOperationsDetails">
        <link:definition>40101 - Disclosure - Nature of Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureStrategicPartnershipsStrategicAllianceWithAllseasDetails" id="DisclosureStrategicPartnershipsStrategicAllianceWithAllseasDetails">
        <link:definition>40601 - Disclosure - Strategic Partnerships - Strategic Alliance with Allseas (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureWarrantsDetails" id="DisclosureWarrantsDetails">
        <link:definition>40801 - Disclosure - Warrants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureWarrantsFairValueOfWarrantLiabilitiesDetails" id="DisclosureWarrantsFairValueOfWarrantLiabilitiesDetails">
        <link:definition>40802 - Disclosure - Warrants - Fair value of warrant liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureWarrantsFairValueMeasurementsAssumptionsDetails" id="DisclosureWarrantsFairValueMeasurementsAssumptionsDetails">
        <link:definition>40803 - Disclosure - Warrants - Fair value measurements assumptions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureShareBasedCompensationDetails" id="DisclosureShareBasedCompensationDetails">
        <link:definition>40901 - Disclosure - Share-Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureShareBasedCompensationRestrictedStockUnitsDetails" id="DisclosureShareBasedCompensationRestrictedStockUnitsDetails">
        <link:definition>40902 - Disclosure - Share-Based Compensation - Restricted Stock Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureShareBasedCompensationEmployeeSharePurchasePlanDetails" id="DisclosureShareBasedCompensationEmployeeSharePurchasePlanDetails">
        <link:definition>40903 - Disclosure - Share-Based Compensation - Employee Share Purchase Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureLossPerShareAntiDilutiveCommonEquivalentSharesDetails" id="DisclosureLossPerShareAntiDilutiveCommonEquivalentSharesDetails">
        <link:definition>41001 - Disclosure - Loss per Share - Anti-dilutive common equivalent shares (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureCreditFacilityWithAllseasAffiliateDetails" id="DisclosureCreditFacilityWithAllseasAffiliateDetails">
        <link:definition>41101 - Disclosure - Credit Facility with Allseas Affiliate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureRelatedPartyTransactionsDetails" id="DisclosureRelatedPartyTransactionsDetails">
        <link:definition>41201 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureCommitmentsAndContingentLiabilitiesDetails" id="DisclosureCommitmentsAndContingentLiabilitiesDetails">
        <link:definition>41301 - Disclosure - Commitments and Contingent Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureSubsequentEventsDetails" id="DisclosureSubsequentEventsDetails">
        <link:definition>41501 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureNatureOfOperations" id="DisclosureNatureOfOperations">
        <link:definition>10101 - Disclosure - Nature of Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureBasisOfPresentation" id="DisclosureBasisOfPresentation">
        <link:definition>10201 - Disclosure - Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureUseOfEstimates" id="DisclosureUseOfEstimates">
        <link:definition>10301 - Disclosure - Use of Estimates</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureFairValueOfFinancialInstruments" id="DisclosureFairValueOfFinancialInstruments">
        <link:definition>10401 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureSignificantAccountingPoliciesAdoptedDuringPeriod" id="DisclosureSignificantAccountingPoliciesAdoptedDuringPeriod">
        <link:definition>10501 - Disclosure - Significant Accounting Policies Adopted During the Period</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureStrategicPartnerships" id="DisclosureStrategicPartnerships">
        <link:definition>10601 - Disclosure - Strategic Partnerships</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureExplorationAndEvaluationExpenses" id="DisclosureExplorationAndEvaluationExpenses">
        <link:definition>10701 - Disclosure - Exploration and Evaluation Expenses</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureWarrants" id="DisclosureWarrants">
        <link:definition>10801 - Disclosure - Warrants</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureLossPerShare" id="DisclosureLossPerShare">
        <link:definition>11001 - Disclosure - Loss per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureCreditFacilityWithAllseasAffiliate" id="DisclosureCreditFacilityWithAllseasAffiliate">
        <link:definition>11101 - Disclosure - Credit Facility with Allseas Affiliate</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureRelatedPartyTransactions" id="DisclosureRelatedPartyTransactions">
        <link:definition>11201 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureCommitmentsAndContingentLiabilities" id="DisclosureCommitmentsAndContingentLiabilities">
        <link:definition>11301 - Disclosure - Commitments and Contingent Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureSegmentedInformation" id="DisclosureSegmentedInformation">
        <link:definition>11401 - Disclosure - Segmented Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureSubsequentEvents" id="DisclosureSubsequentEvents">
        <link:definition>11501 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureStrategicPartnershipsTables" id="DisclosureStrategicPartnershipsTables">
        <link:definition>30603 - Disclosure - Strategic Partnerships (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureWarrantsTables" id="DisclosureWarrantsTables">
        <link:definition>30803 - Disclosure - Warrants (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureLossPerShareTables" id="DisclosureLossPerShareTables">
        <link:definition>31003 - Disclosure - Loss per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureFairValueOfFinancialInstrumentsDetails" id="DisclosureFairValueOfFinancialInstrumentsDetails">
        <link:definition>40401 - Disclosure - Fair Value of Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureStrategicPartnershipsInvestmentInLowCarbonRoyaltiesDetails" id="DisclosureStrategicPartnershipsInvestmentInLowCarbonRoyaltiesDetails">
        <link:definition>40602 - Disclosure - Strategic Partnerships - Investment in Low Carbon Royalties (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://tmc.com/role/DisclosureStrategicPartnershipsDetails" id="DisclosureStrategicPartnershipsDetails">
        <link:definition>40603 - Disclosure - Strategic Partnerships (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="tmc-20230630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="tmc-20230630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="tmc-20230630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="tmc-20230630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:roleType roleURI="http://tmc.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:element name="WarrantLiabilityAbstract" id="tmc_WarrantLiabilityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherItemsAbstract" id="tmc_OtherItemsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ItemsNotAffectingCashAbstract" id="tmc_ItemsNotAffectingCashAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReceivablesAndPrepaymentsCurrent" id="tmc_ReceivablesAndPrepaymentsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ExplorationLicensesNoncurrent" id="tmc_ExplorationLicensesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="WarrantLiability" id="tmc_WarrantLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ScheduleOfReconciliationExplorationLicensesTableTextBlock" id="tmc_ScheduleOfReconciliationExplorationLicensesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionsDetailsTable" id="tmc_RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyTransactionsDetailsLineItems" id="tmc_RelatedPartyTransactionsDetailsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubsequentEventsDetailsTable" id="tmc_SubsequentEventsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubsequentEventsDetailsLineItems" id="tmc_SubsequentEventsDetailsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockOptionsDetailsTable" id="tmc_StockOptionsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockOptionsDetailsLineItems" id="tmc_StockOptionsDetailsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongtermIncentivePlanMember" id="tmc_LongtermIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OceanRenaissanceLLCMember" id="tmc_OceanRenaissanceLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrivatePlacementWarrantsMember" id="tmc_PrivatePlacementWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PublicWarrantsMember" id="tmc_PublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SSCSPteLtdMember" id="tmc_SSCSPteLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SharebasedPaymentArrangementTrancheFourMember" id="tmc_SharebasedPaymentArrangementTrancheFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortTermIncentivePlanMember" id="tmc_ShortTermIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TongaOffshoreMiningLimitedMember" id="tmc_TongaOffshoreMiningLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SoacMember" id="tmc_SoacMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationWarrantsToAcquireSharesOfCommonStock" id="tmc_BusinessCombinationWarrantsToAcquireSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SpecialSharesValue" id="tmc_SpecialSharesValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="WarrantExercisePriceAdjustmentTrigger" id="tmc_WarrantExercisePriceAdjustmentTrigger" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WarrantRedemptionMeasurementConsecutiveTradingDaysOverSpecifiedAmount" id="tmc_WarrantRedemptionMeasurementConsecutiveTradingDaysOverSpecifiedAmount" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WarrantRedemptionMeasurementPeriod" id="tmc_WarrantRedemptionMeasurementPeriod" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringAndNonrecurringBasisLiabilityValue" id="tmc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringAndNonrecurringBasisLiabilityValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringAndNonrecurringBasisLiabilityGainLoss" id="tmc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringAndNonrecurringBasisLiabilityGainLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RedemptionOfWarrantsWhenPricePerShareOfClassCommonStockEqualsOrExceeds18.00Member" id="tmc_RedemptionOfWarrantsWhenPricePerShareOfClassCommonStockEqualsOrExceeds18.00Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInReceivablesAndPrepaidExpense" id="tmc_IncreaseDecreaseInReceivablesAndPrepaidExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncentiveEquityPlan2021Member" id="tmc_IncentiveEquityPlan2021Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SpecialSharesAndOptionsToPurchaseSpecialSharesMember" id="tmc_SpecialSharesAndOptionsToPurchaseSpecialSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WarrantsLiabilityTextBlock" id="tmc_WarrantsLiabilityTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExplorationLabor" id="tmc_ExplorationLabor" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CommonSharesOptionsBasedPayments" id="tmc_CommonSharesOptionsBasedPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ExplorationExpensesInPilotMiningTest" id="tmc_ExplorationExpensesInPilotMiningTest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CommonShareIssuedAndOutstandingPercentage" id="tmc_CommonShareIssuedAndOutstandingPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NoriExplorationContractMember" id="tmc_NoriExplorationContractMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NauruOceanResourcesIncMember" id="tmc_NauruOceanResourcesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MarawaResearchAndExplorationLimitedMember" id="tmc_MarawaResearchAndExplorationLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AreaOfExplorationRightGranted" id="tmc_AreaOfExplorationRightGranted" type="dtr-types:areaItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="MarawaAgreementsMember" id="tmc_MarawaAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TongaOffshoreMiningLimitedExplorationContractMember" id="tmc_TongaOffshoreMiningLimitedExplorationContractMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonSharesWithoutParValueMember" id="tmc_CommonSharesWithoutParValueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RedeemableWarrantsEachWholeWarrantExercisableForOneCommonShareEachAtExercisePriceOf11.50PerShareMember" id="tmc_RedeemableWarrantsEachWholeWarrantExercisableForOneCommonShareEachAtExercisePriceOf11.50PerShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BasisOfPresentationAbstract" id="tmc_BasisOfPresentationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExpirationPeriodAxis" id="tmc_ExpirationPeriodAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExpirationPeriodDomain" id="tmc_ExpirationPeriodDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfBreakDownOfExplorationExpensesTable" id="tmc_ScheduleOfBreakDownOfExplorationExpensesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfBreakDownOfExplorationExpensesLineItems" id="tmc_ScheduleOfBreakDownOfExplorationExpensesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AllseasWarrantsMember" id="tmc_AllseasWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExplorationAndEvaluationActivitiesMember" id="tmc_ExplorationAndEvaluationActivitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExpensesToBeSettledWithShareBasedPayments" id="tmc_ExpensesToBeSettledWithShareBasedPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ExplorationAndEvaluationMember" id="tmc_ExplorationAndEvaluationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AdditionalShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" id="tmc_AdditionalShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="FairValueAssetsLevel1ToLevel2TransfersAmount1" id="tmc_FairValueAssetsLevel1ToLevel2TransfersAmount1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="FairValueAssetsLevel2ToLevel1TransfersAmount1" id="tmc_FairValueAssetsLevel2ToLevel1TransfersAmount1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="FairValueLiabilitiesLevel1ToLevel2TransfersAmount1" id="tmc_FairValueLiabilitiesLevel1ToLevel2TransfersAmount1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="FairValueLiabilitiesLevel2ToLevel1TransfersAmount1" id="tmc_FairValueLiabilitiesLevel2ToLevel1TransfersAmount1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="NonEmployeeDirectorsMember" id="tmc_NonEmployeeDirectorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeeSharePurchasePlanMember" id="tmc_EmployeeSharePurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetLossForPeriod" id="tmc_NetLossForPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AdjustmentsForAmortization" id="tmc_AdjustmentsForAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FairValueAdjustmentsOfWarrant" id="tmc_FairValueAdjustmentsOfWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EnvironmentalStudies" id="tmc_EnvironmentalStudies" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="MiningTechnologicalAndProcessDevelopment" id="tmc_MiningTechnologicalAndProcessDevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="SponsorshipTrainingAndStakeholderEngagement" id="tmc_SponsorshipTrainingAndStakeholderEngagement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="OtherExplorationAndEvaluationExpenses" id="tmc_OtherExplorationAndEvaluationExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ExplorationAndEvaluationExpensesTextBlock" id="tmc_ExplorationAndEvaluationExpensesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExplorationAndEvaluationExpensesAbstract" id="tmc_ExplorationAndEvaluationExpensesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UseOfEstimatesAbstract" id="tmc_UseOfEstimatesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UseOfEstimatesDisclosureTextBlock" id="tmc_UseOfEstimatesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StrategicPartnershipDisclosureAbstract" id="tmc_StrategicPartnershipDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StrategicPartnershipDisclosureTextBlock" id="tmc_StrategicPartnershipDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StrategicAllianceWithAllseasPilotMiningTestProjectMember" id="tmc_StrategicAllianceWithAllseasPilotMiningTestProjectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MilestonePayment" id="tmc_MilestonePayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfContributionToGrossRoyalty" id="tmc_PercentageOfContributionToGrossRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfRepurchaseOfGrossRoyalty" id="tmc_PercentageOfRepurchaseOfGrossRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfReductionInNoriRoyalty" id="tmc_PercentageOfReductionInNoriRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfOwnedCarbonRoyalty" id="tmc_PercentageOfOwnedCarbonRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfCommonStockSharesReceived" id="tmc_PercentageOfCommonStockSharesReceived" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncreaseInPercentageOfGrossRoyaltyInFirstLicenseBlock" id="tmc_IncreaseInPercentageOfGrossRoyaltyInFirstLicenseBlock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncreaseInPercentageOfGrossRoyaltyInSecondLicenseBlock" id="tmc_IncreaseInPercentageOfGrossRoyaltyInSecondLicenseBlock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DecreaseInPercentageOfOwnershipInGrossRoyalty" id="tmc_DecreaseInPercentageOfOwnershipInGrossRoyalty" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FeesAndInterestOnCreditFacility" id="tmc_FeesAndInterestOnCreditFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LineOfCreditFacilityKindInterestRateDuringPeriod" id="tmc_LineOfCreditFacilityKindInterestRateDuringPeriod" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PrefeasibilityStudies" id="tmc_PrefeasibilityStudies" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UnsecuredCreditFacilityMember" id="tmc_UnsecuredCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConsultantMember" id="tmc_ConsultantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FairValueOfNoriRoyalty" id="tmc_FairValueOfNoriRoyalty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CashReceived" id="tmc_CashReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CostOfInvestmentOnTransactionDate" id="tmc_CostOfInvestmentOnTransactionDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AdditionalPaidInCapitalExpensesSettledShareBasedPayments" id="tmc_AdditionalPaidInCapitalExpensesSettledShareBasedPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedDuringPeriodSharesExerciseOfWarrants" id="tmc_StockIssuedDuringPeriodSharesExerciseOfWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightExerciseFeeReceived" id="tmc_ClassOfWarrantOrRightExerciseFeeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ExclusiveVesselUseAgreementMember" id="tmc_ExclusiveVesselUseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeepgreenEngineeringPte.LtdMember" id="tmc_DeepgreenEngineeringPte.LtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ChiefOceanScientistMember" id="tmc_ChiefOceanScientistMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AffiliateOfRelatedPartyMember" id="tmc_AffiliateOfRelatedPartyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MaximumEstimatedExpenditureForFiveYearPeriod" id="tmc_MaximumEstimatedExpenditureForFiveYearPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DirectOfferingMember" id="tmc_DirectOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AllseasMember" id="tmc_AllseasMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UnderutilizationFeePayableInEventOfFailureToDrawDownFromCreditFacility" id="tmc_UnderutilizationFeePayableInEventOfFailureToDrawDownFromCreditFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AsPrepaymentForServicesMember" id="tmc_AsPrepaymentForServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AsPaymentFor2022LtipAwardsMember" id="tmc_AsPaymentFor2022LtipAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AsSignOnGrantMember" id="tmc_AsSignOnGrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueGranted" id="tmc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueGranted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassaWarrantMember" id="tmc_ClassaWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdditionalSaleOfStockNumberOfSharesIssuedInTransaction" id="tmc_AdditionalSaleOfStockNumberOfSharesIssuedInTransaction" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>

