西藏北部申扎地区德日昂玛—下拉山石炭二叠系生物地层划分  

THE CARBONIFEROUS-PERMIAN BIOSTRATIGRAPHIC DIVISION OF DERIANGMATO-XIALASHAN OF THE XAINZA AREA, NORTHERN TIBET

作　　者：郑春子 王永胜 张树岐 

机构地区：[1]吉林地质调查院,吉林长春130061

出　　处：《地层学杂志》2005年第B11期520-528,共9页Journal of Stratigraphy

基　　金：中国地质调查局<多巴区幅>1/25万国土资源大调查项目(20001300009251)。

摘　　要：吉林地质调查院在西藏北部申扎地区进行地质调查时,对石炭纪—二叠纪地层进行了详细研究,自下而上划分为永珠组、拉嘎组、昂杰组、下拉组和木纠错组,并进行了生物地层划分,在永珠组建立了Gnathodus girtyi-Gnathodus texanus牙形剌组合、Goniatites菊石带、Choristites-Spirigerella腕足组合和Trigonatretacf.paucicos-tulata-Elivella baschkirica腕足组合;昂杰组建立了Spiriferella-Costiferina腕足组合;下拉组建立了Ipciphyl-lum-Waagenophyllum-Wentzelellites珊瑚组合、Dielasma millepunctatum-Psudoantiquatonia mutabilis腕足组合和Neoschwagerina带。The Carboniferous--Permian strata may be divided from bottom to top into the Yongzhu, Laga, Angjie and Xiala formations in Deriangmato-Xialashan of the Xainza area, northern Tibet. The Yongzhu Formation can be divided into Gnathodus girtyi-Gnathodus texanus conodont assemblage, Goniatites ammonoid zone, Choristites-Spirigerella and Trigonatreta cf. paucicostulata-Elivella baschkirica brachiopod assemblages. The Angjie Formation includes Spiriferella-Costiferina brachiopod assemblage, and the Xiala Formation may be divided into Ipciphyllum-Waagenophyllum-Wentzelellites coral assemblage, Neoschwagerina fusulinid zone and Dielasma millepunctatum-Psudoantiquatonia mutabilis brachiopod assemblage.

关 键 词：申扎地区 西藏 石炭系 二叠系 生物地层 牙形剌 腕足类 珊瑚 菊石 鲢 

分 类 号：P534.45[天文地球—古生物学与地层学] P534.46[天文地球—地质学]