准噶尔盆地北缘古新世和始新世地层的划分及其时代  

THE DIVISION OF PALEOCENE AND EOCENE DEPOSITS IN THE NORTHERN JUNGGAR BASIN

作　　者：魏景明[1] 童永生[2] 

机构地区：[1]新疆石油管理局勘探开发研究院 [2]中国科学院古脊椎动物与古人类研究所

出　　处：《石油学报》1992年第2期116-120,共5页Acta Petrolei Sinica

摘　　要：根据近20年来古生物学研究,准噶尔盆地北缘的古新世和始新世地层可划分为依希伯拉组和化石沟组。前者时代依植物群归入占新世,后者据哺乳动物化石其时代应为中、晚始新世。Deposits of Paleocene and Eocene, exposed widely in the north part of Junggar basin, can be subdivided into two formations, the Ugbulak formation and the Huashigou formation. Fossil charophytes, Stephanochara breviovalis, Gobichara deserta and Nemegtichara prima, have been found in the Ugbulak formation. These fossils are common in the late Paleocene in Central Asia. In Sangequan area, the Huashigou formation contains some mammal fossils: Hyopsodus huashigouensis, cf. Mesonyx uqbulakensis, cf. Metahapalodectes sp., Pantolambdodon sp., Metacoryphodon sp., Uintatherium cf. insperatus, Schlosseria magister, and Breviodon minutus. The mammal assemblage shows that age of the fossiliferous beds are equivalent to Arshantan(M. Eocene). In Jimunai-Buerjing area a few teeth of Hyaenodon and anthracotheriid, which are thought to appear in late Eocene, are found from the same formation. Therefore, the deposition of the formation may be extended to a later period.

关 键 词：下第三系 地层剖面 地层划分 

分 类 号：P534.61[天文地球—古生物学与地层学]