Abstract: The geological age of Tertiary red beds in Jiuquan basin is discussed in this paper,based on the composite analysis of the data of Tertiary spore-pollen,ostracodes,mammal fossils,magnetic stratigraphic profile,and seismic reflection sequence.It is concluded that the rock member of grey-greenish mudstone with gypsum at the top of Zhonggou formation used to be assigned as lower Cretaceous is now recognized as Eogene in age;The newly-estahiished Liugouzhuang formation,Huoshaogou formation and Baiyanghe formation are of Oligocene;The Shulehe group is of Neogene,in which the Gongxingshan and Getanggou formation are Miocene and Niugetao formation is Pliocene.

摘要： 本文通过酒泉盆地第三纪孢粉、介形类、哺乳类化石资料和磁性地层剖面及地震反射层序等特征的综合分析,对酒泉盆地第三纪红色岩层的地质时代进行了讨论,认为原划分为下白垩统中沟组顶部夹薄石膏层的灰绿色泥岩段地层时代属始新世,新建立地层单元柳沟庄组;火烧沟组、白杨河组时代均属渐新世;疏勒河群时代为晚第三纪,其内的弓形山组、胳塘沟组为中新世,牛胳套组为上新世.

关键词: 酒泉盆地, 第三纪, 古生物学, 化石, 磁性层, 地层剖面, 地层划分, 地层年代单位