西藏那曲地区中三叠统嘎加组放射虫动物群  

RADIOLARIAN FAUNA OF MIDDLE TRIASSIC GAJIA FORMATION IN THE NAGQU AREA, TIBET

作　　者：王玉净[1] 沙金庚[1] 许波[1] 武学进 尼玛次仁 谢尧武 WANG Yujing;SHA Jingeng;XU Bo;WU Xuejin;NIMACIREN;XIE Yaowu(State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Instiute of Geology and Palaeontology und Center for Excelence in Life and Paleoervironment,Chinese Academy of Sciences,Nanjing 210008,China;University of Science and Technology of China.Hefei 230026,China;Tibet Geological Survey Iustitute.Duilongdeqing 851400,China)

机构地区：[1]现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所和生物演化与环境卓越创新中心,fmyi210008 [2]中国科学技术大学,合肥230026 [3]西藏地质调查院,堆龙德庆851400

出　　处：《微体古生物学报》2021年第1期25-47,共23页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(41730317)项目的资助。

摘　　要：本文描述西藏那曲地区混杂岩带嘎加组放射虫26属50种,其中包括5个未定种和4个新种,归属于10科4目。这个放射虫动物群以产Oertlispongus inaequispinosus为特征,数量也最多,我们称为Oertlispongus inaequispinosus组合带,时代为中三叠世安尼晚期。这个放射虫动物群主要分布在冈瓦纳大陆的北缘(黄汲清和陈炳蔚称南特提斯,1987),从南欧的斯洛文尼亚、奥地利、意大利,经中东的土耳其、阿曼地区,到达中国西藏的藏南东部泽当金鲁地区,拉萨地体那曲地区和羌塘南部的改则地区,藏北的巴颜喀拉盆地(羊湖)和四川西部的道孚地区。同时,在日本的美浓地体和菲律宾也有发现。这个动物群的分布规律与特提斯洋的演化有着密切的联系。Radiolarian fauna of the Gajia Formation from the mélange belt of Nagqu area, Tibet is described, containing representatives of 4 orders, 10 families, 26 genera and 50 species(including 5 unidentified and 4 new species). This fauna characterized by having more Oertlispongus inaequispinosus is termed the Oertlispongus inaequispinosus assemblage zone, ranging the Late Anisian of Middle Triassic and mainly distributed in the northern marginal portions of Gondwanaland(namely Huang et Chen’s southern Tethys, 1987), such as, Slovenia, Austria, Hungary, Italy of southern Europe, the southern part of Turkey, Oman area of the Middle East, the Jinlu area of Zetong, South Tibet, the Gerze area of southern Qingtang, Nagqu area of Lhasa Terrane, the Bayan Har Basin of North Tibet and the Daofu area of the western Sichuan, the Mino area of Japan and the Philippines from west to East respectively. The distributed regularity of this fauna is closely correlative with the evolution of the Tethys Ocean.

关 键 词：放射虫 Oertlispongus inaequispinosus动物群 安尼晚期 那曲 特提斯洋 

分 类 号：Q915[天文地球—古生物学与地层学]