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.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
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)
