Multiple Uplift and Exhumation of the Southeastern Tibetan Plateau:Evidence from Low-Temperature ThermochronologyOACSTPCD
Multiple Uplift and Exhumation of the Southeastern Tibetan Plateau:Evidence from Low-Temperature Thermochronology
Since the Cenozoic,the Tibetan Plateau has experienced large-scale uplift and outgrowth due to the India-Asia collision.However,the mechanism and timing of these tectonic processes still remain debated.Here,using apatite fission track dating and inverse thermal modeling,we explore the mechanism of different phases of rapid cooling for different batholiths and intrusions in the southeastern Tibetan Plateau.In contrast to previous views,we find that the coeval granitic batholith exposed in the same tectonic zone experienced differential fast uplift in different sites,indicating that the present Tibetan Plateau was the result of differential uplift rather than the entire lithosphere uplift related to lithospheric collapse during Cenozoic times.In addition,we also suggest that the 5-2 Ma mantle-related magmatism should be regarded as the critical trigger for the widely coeval cooling event in the southeastern Tibetan Plateau,because it led to the increase in atmospheric CO2 level and a hotter upper crust than before,which are efficient for suddenly fast rock weathering and erosion.Finally,we propose that the current landform of the southeastern Tibetan Plateau was the combined influences of tectonic and climate.
WU Limin;PENG Touping;FAN Weiming;ZHAO Guochun;GAO Jianfeng;DONG Xiaohan;PENG Shili;MIN Kang;Tin Aung MYINT
State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China||Chinese Academy of Sciences Center for Excellence in Deep Earth Science,Guangzhou 510640,China||University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China||Chinese Academy of Sciences Center for Excellence in Deep Earth Science,Guangzhou 510640,ChinaUniversity of Chinese Academy of Sciences,Beijing 100049,China||Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences,Beijing 100101,ChinaDepartment of Earth Sciences,The University of Hong Kong,Hong Kong 999077,ChinaState Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaSouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,Guangdong 519085,ChinaDepartment of Geology,University of Mandalay,Mandalay 05011,Myanmar
apatite fission trackrapid coolingdifferential upliftmagmatismsoutheastern Tibetan Plateau
《地质学报（英文版）》 2024 (003)
569-584 / 16
We thank Fang Xiaoyu,Liu Bingbing,Zhang Jingyi and Zhao Liang for their assistance with related sample collection.We are also especially grateful to Science Editor and one anonymous reviewer for their constructive comments.This work was jointly supported by National Natural Science Foundation of China(Grant Nos.42025301,41730213 and 41890831),the Second Tibetan Plateau Scientific Expedition and Research Program(Grant No.2019QZKK0702),Hong Kong RGC GRF(Grant No.17307918),and HKU Internal Grants for Member of Chinese Academy of Sciences(Grant No.102009906)and for Distinguished Research Achievement Award(Grant No.102010100).
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