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塔里木盆地玉北地区蓬莱坝组白云岩类型及成因-岩石学报.PDF

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10000569/2017/033(04)123342 ActaPetrologicaSinica 岩石学报 塔里木盆地玉北地区蓬莱坝组白云岩类型及成因 1,2 2 1,2 2 1,2 1,2 1,2 刘红光  刘波 吴双林  张学丰 田泽普  石开波  刘建强 1,2 2 1,2 2 1,2 1,2 1,2 LIUHongGuang ,LIUBo,WUShuangLin ,ZHANGXueFeng,TIANZePu ,SHIKaiBo andLIUJianQiang 1北京大学地球与空间科学学院,北京 100871 2北京大学石油与天然气研究中心,北京 100871 1SchoolofEarthandSpaceSciences,PekingUniversity,Beijing100871,China 2InstituteofOilandGas,PekingUniversity,Beijing100871,China 20160522收稿,20160907改回 LiuHG,LiuB,WuSL,ZhangXF,TianZP,ShiKBandLiuJQ2017ThetypesandoriginofthePenglaibaFormation dolomiteintheYubeiarea,TarimBasinActaPetrologicaSinica,33(4):1233-1242 Abstract  ThePenglaibaFormationdolomitesintheYubeiareacanbedividedintothreetypes,whicharelaminatedmicriticfine euhedraldolomite,medium euhedralsubhedraldolomite,coarseeuhedralanhedraldolomiterespectively Thelamina of penecontemporaneousmicriticfinedolomitecanbeobservedfromboththecoreandthethinsectionTheREEnormalizedpatternand 18 REEofmicriticfinedolomiteresemblethecharactersofcontemporaneouslimestoneThe Oshowssimilaritywiththedolomite ∑ δ precipitatedfromthecontemporaneousseawaterThosecharactersindicatethatthedolomitizationfluidofmicriticfinedolomiteis contemporaneousseawaterThehighsalinityindexshowsaconcentratedfluidcharacterandinsuchanenvironmenttherapid 87 86 crystallizationprocessresultsinlessordereddolomiteThehighcontentsofFe,Siandhigh Sr/ Srintheintercrystalporesof dolostonedemonstratearelativelowsealevelandthemixofterrigenousmaterialTheseepagerefluxoriginatedmediumdolomiteand 87 86 coarsedolomitea
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