青海格尔木市乌丽晚二叠世乌丽群下部的腕足化石群及Waagenites的地理分布  

LATE PERMIAN BRACHIOPODS FROM THE LOWER PART OF THE WULI GROUP, SOUTHWESTERN QINGHAI AND THE GEOGRAPHIC DISTRIBUTION OF WAAGENITES

作　　者：廖卓庭[1] 徐均涛[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2002年第1期130-136,共7页Acta Palaeontologica Sinica

基　　金：国家自然科学基金 (No .4975 0 0 5 )资助课题

摘　　要：记述的腕足动物化石标本采自青海格尔木市乌丽附近的开心岭煤矿 (即乌丽煤矿 )乌丽群的下部 ,经研究认为 ,该化石群的腕足动物属种组合及生物相特征 ,可与华南苏皖南部、川东华蓥山的龙潭组 ,黔西的宣威组下部 ,以及藏东昌都一带的妥坝组等的腕足化石群对比 ,属于华南晚二叠世早期 (吴家坪期 )海陆交互相含煤岩系所产的常见类群。讨论和纠正了英方关于该化石群的部分属种鉴定名称、时代结论 ,以及中国学者过去引证乌丽群化石资料与地层名称方面的错误 ,并就二叠纪地质作用和地质历史的强烈影响 ,探讨了Waagenites与TethyoSummary The Wuli Group in the Hoh Xil Tanggula Stratigraphic Region of the Tibetan plateau is a lithostratigraphic unit consisting of a sequence of clastic rocks, volcanic rocks, and carbonate rocks. It is over 1 000m thick and contains macrophytes, brachiopods and other fossils. The brachiopods from the carbonate rocks in the upper part of the Wuli Group have been reported and indicate an age of late Late Permian (Changxingian). The brachiopod specimens dealt with in this paper were collected from the lower part of the Wuli Group at the Kaixinling Coal Mine (Wuli Coal Mine) by the Sino Britain Comprehensive Geologic Expedition to the Tibetan plateau. The studies show that these brachiopods may be correlated, in generic and specific composition and palaeontological facies, with those from the Longtan Formation in the South of Jiangsu and Anhui, South China and in the Huayingshan of eastern Sichuan and with those from the Tuoba Formation around Changdu of eastern Xizang, as well as with those from th lower part of the Xuanwei Formation in western Guizhou, belonging to the forms common in South China, i.e. the early Late Permian (Wujiapingian) paralic facies of the coal measures. Based on this, the list of fossils identified by British Dr. Brunton C.H.C.was revised and some generic and specific names were corrected. Some mistakes in the citations of the data on the brachiopods from the Wuli Group and some stratigraphical names in the books “Geological evolution of the Tibetan Plateau” and Illustrated books of “Paleontological Atlas of the northwestern region (on the part of Qinghai)” were corrected too. Recently, Chen et al . (2000) established a new genus Tethyochonetes of the Rugosochonetidea. This genus was separated from the Waagenites . Based on the differences in the morphological characters and geological and geographical distributions, they transferred all the species originally referred to Waagenites from the Late Permian (Lopingian) strata of China to Tethyochonetes . The au

关 键 词：腕足动物 Waagenites 二叠纪 乌丽群 青藏高原 乌丽群 化石群 地理分布 

分 类 号：Q915[天文地球—古生物学与地层学]