2008•Acta Geological SinicaRequires access

Characteristics of North of Tibetap Plateau Uplift at Paleocene-Miocene——The Evidence from Ke Kexili Basin

Luo Zhong-jie

Abstract

There have long been controversies with the precise time of the Qinghai-Tibetan Plateau uplifting,and the dating data are 45Ma,32Ma and 14Ma,respectively.This paper takes the Ke Kexili Basin——he largest red basin in the hinterland of the Qinghai-Tibet Plateau as an example to study the time of the the Qinghai-Tibetan Plateau lifting,its features and effects in terms of sediments,biology and volcanic rocks since the Paleocene-Miocene.Our study indicates that there was a decreasing event in temperature occurring at the plateau in the Paleocene-Miocene.The composition is characterized by calcilutite and adakitic rock;the organism by phytolith composing mainly of gymnosperm.The Qinghai-Tibet Plateau was being lifted since the Middle Miocene.

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Key concepts: Plateau (mathematics), Geology, Volcanic plateau, Phytolith, Structural basin, Paleontology, Gymnosperm, Late Miocene