A Compilation of New and Existing Thermochronology Data Concerning the Lhasa Terrane Combined with a Geological Synthesis of the Area  

作　　者：ZHAO Zhongbao LI Chao MA Xuxuan LI Haibing 

机构地区：[1]Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China [2]Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China

出　　处：《Acta Geologica Sinica(English Edition)》2022年第5期1534-1544,共11页地质学报（英文版）

基　　金：co-funded by the National Key Research and Development Project 'Key scientific issues of transformative technology' (Grant No. 2019YFA0708601);the second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant (Grant No. 2019QZKK0802);the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (Grant No. GML2019ZD0201);National Natural Science Foundation of China (Grant Nos. 41502198, 40921001, 41672223);Research Grant of Chinese Academy of Geological Sciences (Grant No. J2024);Geological Survey of China (Grant Nos. DD20190057, DD20190060)。

摘　　要：The history and geodynamic mechanisms of Cenozoic exhumation and denudation of the Lhasa terrane(LT),southern Tibetan Plateau, remain poorly constrained. Most previous studies investigating the exhumation of the LT have relied on extrapolating interpretations based on a few well-studied but small areas, which inevitably introduce bias. Here,our compilation of new and published thermochronologic ages are plotted against latitude, longitude, and elevation, to illustrate the distribution of cooling ages across broad regions of the LT. Primary results reveal that(1) the north LT experienced significant exhumation during 80–40 Ma;(2) compared with north LT, exhumation and erosion in the south LT continued after ~40 Ma;and(3) N–S striking rifting, E–W striking river incision, and thrusts led to continued local denudation of the south LT between 20–5 Ma.

关 键 词：THERMOCHRONOLOGY exhumation and denudation GANGDESE Lhasa terrane Tibetan Plateau 

分 类 号：P597.3[天文地球—地球化学]