羌塘盆地北部乌兰乌拉湖地区晚二叠世古生物新资料  

NEW DATA ON PALAEONTOLOGY OF LATE PERMIAN IN THE ULAN UL HU AREA, NORTHERN QIANGTANG BASIN, NW CHINA

作　　者：赵兵[1] 段丽兰[1] 陈海霞[1] 

机构地区：[1]成都理工大学沉积地质研究院,成都610059

出　　处：《微体古生物学报》2006年第4期392-398,共7页Acta Micropalaeontologica Sinica

摘　　要：首次在北羌塘盆地北部乌兰乌拉湖地区测制了多条晚二叠世地层剖面,并采获丰富的古生物化石。将区内二叠系划分为那益雄组和拉卜查日组两个正式组级地层单位。描述了新发现的一个类新种和四个海绵类新种,建立了两个类生物带,即Codonofusiella-Gallowayinellalaxa组合带及Palaeofusulinasinensis延限带,一个非有孔虫组合带,即Colaniellanana-Robuloidesacutus组合带。其地质年代为晚二叠世长兴期。Several Permian sections were measured in the Ulan U1 Hu area, Northern Qiangtang Basin, NW China. Abundant fossils were collected and identified. Permian sediments in this area are divided into two formal stratigraphic units： the Nayixiong Fm. and the Lapuchari Fm. One new species of Fusulinida and four new species of Porifera are described in this paper. Three biozones of Foraminiferida, the Codonofusiella-Gallowayinella laxa assemblage-Zone, the Palaeofusulina sinensis rang-zone and the Colaniella nana-Robuloides acutus assemblage-Zone, are established according to species composition and stratigraphic distribution. It is proposed that both Nayixiong Fm. and Lapuchari Fm. belong to the Changhsingian stage of Late Permian.

关 键 词：古生物 筵类 海绵类 新种 生物地层 晚二叠世 长兴阶乌兰乌拉湖 羌塘盆地 

分 类 号：Q911[天文地球—古生物学与地层学]