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

吉林地质调查院在西藏北部申扎地区进行地质调查时，对石炭纪一二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 tezanus牙形刺组合、Goniatites菊石带、Choristites-Spirigerella腕足组合和Trigonatreta cf．paucicostulata-Elivella baschkirica腕足组合；昂杰组建立了Spiriferella-Costiferina腕足组合；下拉组建立了Ipciphyllure-Waagenophyllum-Wentzelellites珊瑚组合、Dielasma millepunctatum-psudoantiquatonia mutabilis腕足组合和Neoschwagerina筵带。

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

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.