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地质学报 2015
DistributionCharacteristicsandMetallogenicRegularityofGraphiteDepositsinQinlingOrogen,China, PP. 1244-1263 Keywords: Qinlingorogen,graphitedeposits,graphitegneiss,Metallogenicregularity Abstract: Qinlingorogenisoneofthefivemainrepositorydistributionprovincesoflargescalegraphiteresources.GraphiteoccurrencestrataaremultitudinousincludingNeoArchaeangrouptoNeopaleozoic.Mineraldeposittypesarecompleteconsistingofcrystalflakygraphitedepositandaphaniticgraphitedeposit,oretypesoftheformeraremaingraphitegneiss,graphiteschistandgraphitizedmarble,andoretypesofthelatteraremaingraphitelayermetamorphosisedfromcoalbedandgraphiticcarbargilite.Atpresent,mostgraphitedepositswithlowresearchdegreeonlyimplementpreliminaryinvestigationsofthegraphiteresource,whichhasagoodprospect.Basedonthebasicmaterialofdozensofgraphitedeposits,spotsandplaysdiscoveredintheQinlingorogen,thispaperappliedgeologicmultidisciplinaryanalysismethodtodisclosethegraphitedeposittypesoftheQinlingorogen,mainlythroughoutdoorsgeologicsurveyandspecimenexaminationwithanalysisofsometypicaldeposits:regionalmetamorphismcrystalgraphitedepositsandthermo-contactmetamorphicaphaniticgraphitedeposits,withthecontroloflatitudinallytrendingregionaltectonic,graphitedepositsoftheQinlingorogendistributesublatitudinallytrendingthreelargeorebelts:ItheNeoarchean？ProterozoicbasementcrystalgraphiteenrichmentdepositszonealongthesouthmarginofNorthChinaplate;IItheCarboniferousintermountainbasingroupaphaniticgraphiteenrichmentdepositszoneneartheShangdansutureoftheWestQinling;IIIPaleozoiccrystalgraphiteenrichmentdepositszoneintheQinlingpaleomicroplateofthewestpartoftheEastQinling.Conclusionsarereachedfrommultipleinquiries:Qinlingmulti-cyclecomplexcontinentalcollisionorogenzonehasexperiencedmultipletectonicframeworktransformationandpolyphasetectonicthermaleventfromNeoArcheanErathemadjointingmultiplegraphitetectonicmineralizationcycle.Inthelightofchiefcontrolofmineralizationandoretypes,eachofthethreelargegraphitedepositsbeltsoftheQinlingorogenhasitsowngenesis:IgraphitedepositsenrichedmetallogeneticzoneisthatregionaltectogeneticmovementfromNeoArchaeancausedpolyphasemetapepsis,whichsuperimposedupandreconstructedNeoArcheanErathemtoProterozoicbasement,formingregionalmetamorphicbigflakecrystalgraphitedeposits;IIgraphitedepositsenrichedmetallogeneticzoneisthatpolyphaseregionaltectogeneticmovementassociatedwithmultipleheatingcausedbymultiphaseigneousintrusion,whichresultedinoriginalcoallayersemergingmultiplethermo-contactmetamorphismsandformedthermo-contactmetamorphicaphaniticgraphitedeposits.IIIgraphitedepositsenrichedmetallogeneticzoneisthatPalaeozoiccap？rockexperiencedpolyphasemetapepsis,formingregionalmetamorphicfinelyflakecrystalgraphitedeposits.Comprehensiveresearchofmetallogeneticmechanismingraphitedepositsanditsassociatedprofit
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