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福建马坑铁钼矿床矽卡岩矿物学特征及分带研究-岩石学报.PDF

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10000569/2014/030(05)133954 ActaPetrologicaSinica 岩石学报 福建马坑铁(钼)矿床矽卡岩矿物学特征及分带研究 1,2 3 张志  张承帅 1,2 3 ZHANGZhi andZHANGChengShuai 1中国地质大学,北京 100083 2中国地质调查局发展研究中心,北京 100037 3中国地质科学院矿产资源研究所,北京 100037 1ChinaUniversityofGeoscience,Beijing100083,China 2DevelopmentandResearchCentre,ChinaGeologicalSurvey,Beijing100037,China 3InstituteofMineralResources,ChineseAcademyofGeologicalSciences,Beijing100037,China 20131010收稿,20140102改回 ZhangZandZhangCS2014SkarnmineralcharacteristicsandzonationoftheMakengFeModepositinFujianProvince ActaPetrologicaSinica,30(5):1339-1354 Abstract  TheMakengFeModepositisalargedeposithostedintheinterlayerfracturezonebetweencarbonatesofHuanglong Formation(Ch)andclasticrocksofLindiFormation(Cl)attheexocontactzoneoftheJuzhouDayanggraniteTheironoreare 2 1 closelycoexistingwithskarnsHowever,theoregenesisherehasstillbeencontroversialInthispaper,westudiedthemineralogical characteristicsofskarnsinMakengFeModepositwithelectronmicroprobeanalysis,whichshowedthatthemineralassemblagesof skarnsinthisdepositmainlyconsistedofpyroxene,garnetandbustamiteTheretrogradealteredmineralswerecomprisedofchlorite, epidote,amphiboleandquartzThemineralcompositionofclinopyroxenearediopside,hedenbergite,andasmallamountof johannsenitePyroxenoidsaremainlycomposedbybustamiteandrhodoniteTheendmemberofgarnetisdominatedbyandradite,with minorgrossulariteTheamphiboleinthisdepositcanbeclassifiedintocalcicamphiboleAllthemineralogicalcharactersofskarns showedthattheyweremainlyformedunderrelativeoxidizingconditionsTheskarnsinMakengFeModepositresultedfromthe metasomatismformedbythermalfluidflowingalongtheinterlayerfracturezonesbetweenlimestoneandclasticrocks,mostironore hostedintheskarns,usuallythemagnetitesformedlaterthantheskarnsandconstitutedametasomatictexture,notonlyreplaced skarnswidely,butalsodirectalternatedlimestone,sandstoneinthewallrock
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