Cenozoic tectonic development of the Qaidam Basin in the northeastern Tibetan Plateau

2008 ◽  
Author(s):  
Qing-Ren Meng ◽  
Xiang Fang
Keyword(s):  
Tibetan Plateau ◽  
Qaidam Basin ◽  
Northeastern Tibetan Plateau ◽  
Tectonic Development

scholarly journals An Early Miocene Lowland on the Northeastern Tibetan Plateau

2021 ◽  
Vol 9 ◽  
Author(s):  
Qian Tian ◽  
Xiaomin Fang ◽  
Yan Bai ◽  
Chihao Chen ◽  
Juzhi Hou ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Sea Level ◽  
Late Miocene ◽  
Qaidam Basin ◽  
Early Miocene ◽  
Annual Average ◽  
Northeastern Tibetan Plateau ◽  
The Mean ◽  
First Time ◽  
Glycerol Dialkyl Glycerol Tetraethers

The northeastern Tibetan Plateau (NE TP) has long been thought to be the last part of the Plateau to be raised, but this assumption has been challenged by recent analyses of fossil leaf energy, which have pointed to the possibility that the present surface altitude of ∼3,000 m above sea level (asl) in the Qaidam Basin (QB) was attained during the Oligocene. Here, for the first time, we present a record of glycerol dialkyl glycerol tetraethers (GDGTs) from a well-dated Cenozoic section in the QB. This record appears to demonstrate that the mean annual average paleotemperature of the QB was 28.4 ± 2.9°C at ∼18.0 Ma. This would suggest that the paleoelevation of the QB was only ∼1,488 m asl at that time and that a ∼1,500 m uplift was attained afterwards, in agreement with the massive shortening of the QB and the rapid drying of inland Asia since the late Miocene.

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