The first discovery of Permian conodont fauna from peri-Gondwana cool water facies in Tibet,China  

作　　者：ZHENG YouYe XU RongKe WANG ChengYuan MA GuoTao 

机构地区：[1]Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China [2]Research Institute of Geological Survey of Tibet Autonomous Region, Lhasa 850000, China [3]Research Institute of Geological Survey of Gansu Province, Lanzhou 730050, China [4]Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Chinese Science Bulletin》2007年第9期1231-1237,共7页

基　　金：Supported by the Chinese National Key Project for Basic Research (Grant No. 2002CB412610);the National Natural Science Foundation of China (Grant Nos. 40542008 and 40672012) ;Chinese Geological Survey Project (Grant No. 200213000009)

摘　　要：The Angjie Formation and Xiala Formation,present in the Shiquanhe area of Gar County in the western part of Gangdise,Tibet,belong to the Gangdise stratigraphic subregion. Conodonts have been found in the Angjie Formation,and they permit an age determination of Early to Middle Permian for that formation. The age of the Xiala Formation could be late Middle Permian. Whether the Late Permian marine deposits are present in this area still needs to be determined,but it is possible that the lower part of the Xiala Formation overlaps partly the upper part of the Angjie Formation. More importantly,the study has brought about a finding of typical peri-Gondwana cool water facies conodonts,namely,Vjalovognathus sp. nov. x. This is the first report and brief description of a conodont fauna from peri-Gondowana cool water facies in China. It indicates that the Gangdise stratigraphic subregion can be subdivided;the western part belongs to peri-Gondwana cool water facies,and the eastern part belongs to Tethys.The Angjie Formation and Xiala Formation, present in the Shiquanhe area of Gar County in the western part of Gangdise, Tibet, belong to the Gangdise stratigraphic subregion. Conodonts have been found in the Angjie Formation, and they permit an age determination of Early to Middle Permian for that formation. The age of the Xiala Formation could be late Middle Permian. Whether the Late Permian marine deposits are present in this area still needs to be determined, but it is possible that the lower part of the Xiala Formation overlaps partly the upper part of the Angjie Formation. More importantly, the study has brought about a finding of typical peri-Gondwana cool water facies conodonts, namely, Vjalovognathus sp. nov. x. This is the first report and brief description of a conodont fauna from peri-Gondowana cool water facies in China. It indicates that the Gangdise stratigraphic subregion can be subdivided; the western part belongs to peri-Gondwana cool water facies, and the eastern part belongs to Tethys.

关 键 词：二叠纪 冈瓦纳冷水相 牙形石动物群 西藏 首次发现 

分 类 号：Q915.817[天文地球—古生物学与地层学] P534.46[生物学—古生物学]