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秦岭造山带三叠纪岩浆碳酸岩的成岩成矿研究的中期报告.docx

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秦岭造山带三叠纪岩浆碳酸岩的成岩成矿研究的中期报告 Abstract: Mid-termreportonthediagenesisandmineralizationofTriassicmagmaticcarbonaterocksintheQinlingorogenicbelt KeyWords: Qinlingorogenicbelt;Triassic;magmaticcarbonaterocks;diagenesis;mineralization Introduction: TheQinlingorogenicbeltisamajororogenicbeltinChina,withasignificantamountofmagmaticactivityduringtheMesozoicera.TheTriassicmagmaticcarbonaterocksinthisorogenicbeltareofconsiderablegeologicalsignificanceduetotheiruniquegeologicalprocessesandrichgeologicalresources.ThisstudyaimstoexplorethediagenesisandmineralizationofTriassicmagmaticcarbonaterocksintheQinlingorogenicbelt. Methodology: ThestudyareaincludesthesouthernandnorthernsegmentsoftheQinlingorogenicbelt.Inthefield,wefirstconducteddetailedgeologicalmappingtoidentifythedistributionofTriassicmagmaticcarbonaterocksandtheirrelationshipwithotherrocktypes.Wethencollectedalargenumberofsamplesfromthestudyareaandconductedpetrographicanalysis,microstructureanalysis,andgeochemicalanalysistodeterminethecomposition,structure,andcharacteristicsoftherocks. Results: Basedonourfieldobservations,wefoundthattheTriassicmagmaticcarbonaterocksinthesouthernandnorthernsegmentsoftheQinlingorogenicbeltaremainlydistributedintheformofstocks,dikes,andbatholiths.Inthepetrographicanalysis,weobservedthattheserocksaremainlycomposedofcalcite,dolomite,andankerite.Inthemicrostructureanalysis,weidentifiedseveraldiagenetictextures,includingneomorphictextures,recrystallization,pseudomorph,replacement,anddissolution.Inthegeochemicalanalysis,wefoundthattherockshaveastrongpositivecorrelationwithmetalssuchasCu,Pb,andZn,indicatingthepresenceofmineralization. Conclusion: TheTriassicmagmaticcarbonaterocksintheQinlingorogenicbeltunderwentsignificantdiagenesisduringtheMesozoicera,leadingtotheformationofvariousdiagenetictextures.Moreover,therockshaveastrongcorrelationwithmineralization,indicatingtheirpotentialasavaluablesourceofgeologicalresources.Furtherstudiesarerequiredtoinvestigatethespecificmineralizationcharacteristicso