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西藏札达晚白垩世-古新世浮游有孔虫及其时代意义

Xiao-qiao WAN,Jin-he LI,Shuang-zeng ZHANG,Lian-heng WU

ACTA MICROPALAEONTOLOGICA SINICA（2005）

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Abstract
札达地处西藏最西部的阿里地区.本文对波林剖面、龙吉剖面和加纳崩剖面进行了研究,发现了丰富的浮游有孔虫动物群,属于Globotruncanita elevata化石带、Globotruncana ventricosa化石带、Globotruncanita stuarti化石带和Globigerina eugubina化石带,时代由晚白垩世至古新世早期.通过与岗巴、江孜和吉隆地区的地层对比,认为特提斯-喜马拉雅海区的海退可能是由东向西发展的.
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