Palynological evidence sheds new light on the age of the Liuqu Conglomerates in Tibet and its geological significance

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• 作者：LiJie Wei (1) (2)
  XiaoHan Liu (1)
  FuHua Yan (3)
  XueShun Mai (3)
  GuangWei Li (1)
  XiaoBing Liu (1)
  XueJun Zhou (1)
  
• 关键词：Southern Tibet ; Yalung Zangpo suture zone ; Liuqu Conglomerates ; palynological assemblage ; Oligocene
• 刊名：Science China Earth Sciences
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：54
• 期：6
• 页码：901-911
• 全文大小：1082KB
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• 作者单位：LiJie Wei (1) (2)
  XiaoHan Liu (1)
  FuHua Yan (3)
  XueShun Mai (3)
  GuangWei Li (1)
  XiaoBing Liu (1)
  XueJun Zhou (1)
  
  1. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100085, China
  2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
  3. Institute of Geology, China Earthquake Administration, Beijing, 100029, China
  
• ISSN：1869-1897

文摘

The Liuqu Conglomerates consist of a suit of terrestrial molasse deposits formed in a foreland basin of the Himalaya-Tibet orogenic belt before the collision of India and Eurasia. These deposits record considerable geological information regarding the late tectonic evolution of the Neotethyan ocean. The palynological study of interlayers of mudstone and mud-sandstones indicates an Oligocene age. The palynological assemblage consists mainly of deciduous broad-leaved angiosperms, with some coniferous gymnosperms and evergreen broad-leaved angiosperms. The deposits reflect a broad-leaved deciduous forest or mixed with conifer-broad-leaved forest ecotypes, showing a warm-temperate or temperate zone climatic environment. This work provides significant new information about the tectonic evolution, paleogeography, and paleoenvironment of southern Tibet during the Cenozoic.