西藏南部吉隆盆地晚中新世-早更新世沃马组介形虫动物群  

Late Miocene-Early Pleistocene Ostracoda Fauna of Oma Formation in Gyirong Basin,Southern Tibet

作　　者：陈奋宁[1] 徐亚东[2,3] 江尚松[2,3] 周修高[3] 

机构地区：[1]西安地质矿产研究所,陕西西安710054 [2]中国地质大学生物地质与环境地质教育部重点实验室,湖北武汉430074 [3]中国地质大学地球科学学院,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2010年第5期821-827,共7页Earth Science-Journal of China University of Geosciences

基　　金：中国地质调查局项目(No.1212010610103);国家自然科学基金项目(Nos.40921062;40830212)

摘　　要：根据在西藏南部吉隆盆地新近纪地层沃马组中获得丰富的介形类化石,鉴定识别出介形虫9属37种,其中8个未定种,根据介形虫动物群在地层剖面上的分布规律,建立了2个介形虫组合带,自下而上为:Ilyocypris pentanoda-Qaidamotherevena组合带和Leucocythere mirabilis-Leucocytherella组合带.通过对研究区介形虫组合带与国内外其他地区相同层位的介形虫组合对比,将沃马组的时代厘定为中新世晚期-早更新世.Diverse and abundant ostracoda fossils were found in the Gyirong basin in the south of the Tibet. Our research is based on 37 species of ostraeoda including 8 undefined ones that belong to 9 generas. On the basis of the characteristics of ostracoda fossil succession, the ostracoda fauna in this area can be divided into 2 ostracoda assembldges in ascending order as follows.. Ilyocypris pentanoda-Qaidarnothere vena assembldge and Leucocythere mirabilis-Leucocytherella assembldge. We compared the ostracoda assembldges of Oma Formation with those worldwide at the same stratum and concluded that the age of Oma Formation is Late Miocene to Early Pleistocene.

关 键 词：吉隆盆地 沃马组 晚中新世-早更新世 介形虫组合带 西藏. 

分 类 号：P534[天文地球—古生物学与地层学] Q915[天文地球—地质学]