松遼盆地南部紅崗背斜幔源-巖漿成因CO2大規(guī)模泄露的巖石學(xué)記錄

松遼盆地南部紅崗背斜幔源-巖漿成因CO2大規(guī)模泄露的巖石學(xué)記錄Abstract

ThesouthernpartoftheSongliaoBasinisatypicalhydrocarbon-producingregioninChina.Inthisregion,theHonggangAnticlineisasignificanttectonicfeature,whereextensivemantle-derivedmagmaticactivityoccurred.ThemagmatismproducedlargeamountsofCO2,whicheventuallyleakedtothesurfaceandimpactedtheregionalgeologicalenvironment.InordertobetterunderstandthemagmaticCO2releaseprocess,weconductedacomprehensivestudyofthepetrologicalandgeochemicalfeaturesoftheHonggangAnticline.

OurresultsshowthattheHonggangAnticlineiscomposedofmainlyMesozoicvolcanicrocksandgranites.Thevolcanicrocksdisplaytypicalarc-likesignatures,withhighAl2O3,lowTiO2,andNb/Yratios.Thegranitesareclassifiedashigh-Kcalc-alkalineseries,characterizedbyhighSiO2,K2OandNa2Ocontents,lowCaOandMgOcontents,andenrichedinLILEs(e.g.,Rb,Ba)andLREEs.Inaddition,zirconU-PbdatingrevealsthatthevolcanicrocksandgraniteswereformedduringtheEarlyCretaceous(~130-125Ma).ThemagmaticCO2releaseisreflectedbytheoccurrenceofCO2-richinclusionsinquartzandcalcite.

Accordingtoourpetrologicalandgeochemicaldata,weproposethatthemagmatismintheHonggangAnticlinewascausedbyasthenosphericmantleupwelling,triggeredbythesubductionofthePaleo-PacificPlatebeneaththeEurasianPlate.Theascendingmantlemeltsformedanarc-likevolcanicfrontandintrudedintothecrusttoformgranites.TheCO2wasproducedbythedegassingofthemantlemeltsandaccumulatedindeep-seatedreservoirs.TheCO2releaseoccurredduringtheupliftanderosionoftheHonggangAnticline,resultingintheformationofCO2-richspringsandfault-controlledgasseeps.

OurstudyprovidesavaluableexampleofmagmaticCO2releaseinahydrocarbon-richbasin,whichcouldhaveimplicationsfortheexplorationofunconventionalhydrocarbonresourcesandCO2geologicalstorage.FurtherstudiesareneededtoquantifytheamountandtimingofCO2releaseandtoevaluateitsimpactsontheregionalgeologicalandenvironmentalsystems.

Keywords:HonggangAnticline,Mesozoicvolcanicrocks,granites,magmaticCO2release,SongliaoBasinThemagmaticCO2releaseintheHonggangAnticlinehassignificantimplicationsfortheexplorationanddevelopmentofunconventionalhydrocarbonresources.IntheSongliaoBasin,coalbedmethaneandshalegasresourcesarepotentialtargetsforexploration,andtheCO2-richmagmaticfluidscanactasanimportantsourceofnaturalgasgenerationandaccumulation.TheCO2-richfluidscanalsoenhancethepermeabilityandporosityofcoalandshalereservoirs,promotingthemigrationandaccumulationofhydrocarbons.Therefore,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinscanprovidevaluableinsightsintotheexplorationanddevelopmentofunconventionalresources.

Inaddition,themagmaticCO2releaseintheHonggangAnticlinemayhaveimplicationsforCO2geologicalstorage.ThenaturalCO2seepsandspringsprovideopportunitiesfortheevaluationofCO2injectionandstoragemechanismsindeepgeologicalformations.TheCO2-richfluidscanalsohelptounderstandthemigrationandtrappingmechanismsofinjectedCO2,andthepotentialimpactsofCO2leakageontheenvironmentandhumanhealth.Therefore,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinscanalsocontributetothedevelopmentofCO2geologicalstoragetechnologies.

Overall,thestudyofmagmaticCO2releaseintheHonggangAnticlineprovidesavaluableexampleofhowgeologicalprocessescanimpacttheregionalgeologicalandenvironmentalsystems,andhowtheycanbeutilizedfortheexplorationanddevelopmentofunconventionalresourcesandthestorageofgreenhousegases.FurtherstudiesareneededtofullyunderstandthecomplexprocessesinvolvedinmagmaticCO2release,andtoassesstheirimpactsontheEarth'ssystems.AnotherimportantaspectofthestudyofmagmaticCO2releaseinhydrocarbon-richbasinsisitscontributiontoourunderstandingoftheEarth'sdeepcarboncycle.ThedeepcarboncycleinvolvesthemovementofcarbonbetweenthedeepEarthandthesurface,anditsstudyiscrucialforunderstandingtheevolutionanddynamicsoftheEarth'sinterioranditsimpactontheenvironment.

TheHonggangAnticlineislocatedinaregionofactivetectonicactivity,wherethedeepcarboncycleishighlyactive.ThemagmaticCO2releaseinthisregionisassociatedwiththeascentofmantle-derivedfluidsfromdeepwithintheEarth'sinterior.ThesefluidscarryimportantcluesaboutthecompositionanddynamicsofthedeepEarth,andtheirstudycanprovideinsightsintothedeepcarboncycle.

Furthermore,thestudyofmagmaticCO2releasecanalsoprovideinsightsintotheglobalcarboncycleanditsimpactonclimatechange.Carbondioxideisoneofthemostimportantgreenhousegasescontributingtoanthropogenicclimatechange,andunderstandingitssources,sinks,andfluxesiscrucialfordevelopingeffectiveclimatechangemitigationstrategies.

Insummary,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinshassignificantimplicationsfortheexplorationanddevelopmentofunconventionalresources,CO2geologicalstorage,thedeepcarboncycle,andclimatechange.Furtherresearchinthisareaisnecessarytofullyunderstandthegeologicalprocessesinvolved,theirimpactontheEarth'ssystems,andtheirpotentialapplications.Inadditiontoitsimplicationsforhydrocarbonexplorationandclimatechangemitigation,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinsalsohasimportantimplicationsformonitoringandestimatingtherisksassociatedwithcarboncaptureandstorage(CCS)projects.

CCSinvolvescapturingcarbondioxidefromlargeemissionsources,suchaspowerplants,andstoringitundergroundingeologicalformations.ThesuccessandsafetyofCCSprojectsrelyontheproperselectionofstoragesitesthatcansecurelycontainthestoredCO2forlongperiodsoftime.MagmaticCO2releasefromthedeepEarthhasthepotentialtocompromisethesafetyofCCSsitesbydisruptingthegeologicalformationsandreleasingCO2backintotheatmosphere.

Therefore,understandingthemechanismsandratesofmagmaticCO2releaseinhydrocarbon-richbasinsiscrucialforidentifyingpotentialrisksandselectingsafeandsecurestoragesitesforCCSprojects.Thisrequiresacomprehensiveapproachthatintegratesgeological,physical,andchemicaldataandmodelstoaccuratelycharacterizethesubsurfaceprocessesinvolved.

Furthermore,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinscanalsoinformthedevelopmentofnewtechnologiesforCO2captureandutilization.Forexample,theCO2releasedfrommagmaticsourcescanpotentiallybecapturedandutilizedforindustrialprocesses,suchasenhancedoilrecoveryortheproductionofhigh-valuechemicals.

Inconclusion,thestudyofmagmaticCO2releaseinhydrocarbon-richbasinshasfar-reachingimplicationsformanyimportantareasofresearch,includinghydrocarbonexploration,thedeepcarboncycle,climatechange,CCS,andthedevelopmentofnewtechnologiesforCO2utilization.Furtherresearchinthisareaisnecessarytofullyunlockitspotentialandaddressthechallengesassociatedwiththesecomplexandinterconnectedsystems.Icompletelyagree.ThestudyofmagmaticCO2releaseinhydrocarbon-richbasinsprovidesauniqueopportunitytounderstandtheinterplayofgeology,chemistry,andphysicsthatgovernthedeepEarth'scarboncycleandits