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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10000569/2017/033(04)123342 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
1SchoolofEarthandSpaceSciences,PekingUniversity,Beijing100871,China
2InstituteofOilandGas,PekingUniversity,Beijing100871,China
20160522收稿,20160907改回
LiuHG,LiuB,WuSL,ZhangXF,TianZP,ShiKBandLiuJQ2017ThetypesandoriginofthePenglaibaFormation
dolomiteintheYubeiarea,TarimBasinActaPetrologicaSinica,33(4):1233-1242
Abstract ThePenglaibaFormationdolomitesintheYubeiareacanbedividedintothreetypes,whicharelaminatedmicriticfine
euhedraldolomite,medium euhedralsubhedraldolomite,coarseeuhedralanhedraldolomiterespectively Thelamina of
penecontemporaneousmicriticfinedolomitecanbeobservedfromboththecoreandthethinsectionTheREEnormalizedpatternand
18
REEofmicriticfinedolomiteresemblethecharactersofcontemporaneouslimestoneThe Oshowssimilaritywiththedolomite
∑ δ
precipitatedfromthecontemporaneousseawaterThosecharactersindicatethatthedolomitizationfluidofmicriticfinedolomiteis
contemporaneousseawaterThehighsalinityindexshowsaconcentratedfluidcharacterandinsuchanenvironmenttherapid
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crystallizationprocessresultsinlessordereddolomiteThehighcontentsofFe,Siandhigh Sr/ Srintheintercrystalporesof
dolostonedemonstratearelativelowsealevelandthemixofterrigenousmaterialTheseepagerefluxoriginatedmediumdolomiteand
87 86
coarsedolomitea
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