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  • 简介:Forskarntypedeposits,therearetwokindsofskarns,skarnformedbyfiltrating-diffusingmetasomatismandveinskarnformedbyfilling.Theveinskarn,discussedthispaperandconsideredtobemagmaticgenesis,ischaracterizedby:(1)occurringasveinwithdistinctboundarieswithcountryrocks,yetjustthesameeveninmarbleeasytobereplaced;(2)composedofamineralassemblagesimi-lartothatofgranite,containingpegmatiteaswellascoarseskarnmineralpockets,andsometimestran-sitedwithdikerocks;(3)clearcrystallinefeatureofdeposition;(4)sideronintietexture;(5)showingvesicular,bean-likeandflowstructures;(6)verycommonliquidimmiscibility;(7)verticalzoningofgravitationaldifferentiationcausedbyvolatileconcentrationupwards;(8)associatedandtransitedwithiron-copperorebodiesofmagmaticgenesisandtungsten-bearingquartzveinsofsilicatemagmaticgene-sisrichinvolatile;(9)meltinclusions.Twooriginsofskammagma,originatedbyassimilationofsilicatemagmaatitsemplacem

  • 标签: skam skam MAGMA ORE MAGMA .liquid
  • 简介:Forthefirsttime,fluid-meltinclusionsarefoundinfluoriteoftheHuanggangliangskarniron-tindeposit(HSID).Thefluoritewasformedinthemainstageofmineralization,namedthehydro-skarnizationstage.TheinclusionscontainvariouscomponentssuchasFe,MgandCrfromdeepsources.ThemeltsofprimaryinclusionsaremainlyCa-andF-richandthoseofsecondaryinclusionstendtobecomeSi-rich.Duringthisevolutionprocess,themeltsandirondaughtermineralsdecreasedandevenvanished.ThesefactsrevealthattheevolutionoftheprimarymineralizingfluidsandthedifferentiationofthefluidsandmeltsarethemainfactorsleadingtothedepositionofFe,Snandotherelements.ThisdiscoveryconfirmsthemagmaticgenesisoftheHSIDandhasfilledinthegapsintheresearchofmagmatogenicskarndepositsandfurnishednewmethodsforsuchresearch.Furthermore,ithasenlargedthescopeoftheresearchonfluidinclusions.

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