Late Mesozoic Exhumation of the Huangling Massif:Constraints on the Evolution of the Middle Yangtze River  

作　　者：SU Jianchao LIN Xu LI Chang’an Jolivet MARC WU Lin CHENG Feng DENG Bin WU Zhonghai CHEN Xiaokang HU Chengwei 

机构地区：[1]School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China [2]College of Civil Engineering and Architecture,China Three Gorges University,Yichang,Hubei 443002,China [3]Géosciences Rennes,CNRS-UMR6118,Univ Rennes,Rennes,France [4]State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Bejing 100029,China [5]Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,School of Earth and Space Sciences,Peking University,Beijing 100871,China [6]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation/Chengdu University of Technology,Chengdu 100871,China [7]Institute of Geological Mechanics,Chinese Academy of Geological Science,Beijing 100081,China

出　　处：《Acta Geologica Sinica(English Edition)》2024年第1期250-264,共15页地质学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.41671011,41871019,41877292,41972212);Research Foundation of Chutian Scholars Program of Hubei Province(Grant No.8210403);Shanxi Key Research and Development program:Feng Cheng(Grant No.2021SF2-03).

摘　　要：Plate subduction leads to complex exhumation processes on continents.The Huangling Massif lies at the northern margin of the South China Block.Whether the Huangling Massif was exhumed as a watershed of the middle reaches of the Paleo-Yangtze River during the Mesozoic remains under debate.We examined the exhumation history of the Huangling Massif based on six granite bedrock samples,using apatite fission track(AFT)and apatite and zircon(U-Th)/He(AHe and ZHe)thermochronology.These samples yielded ages of 157–132 Ma(ZHe),119–106 Ma(AFT),and 114–72 Ma(AHe),respectively.Thermal modeling revealed that three phases of rapid cooling occurred during the Late Jurassic–Early Cretaceous,late Early Cretaceous,and Late Cretaceous.These exhumation processes led to the high topographic relief responsible for the emergence of the Huangling Massif.The integrated of our new data with published sedimentological records suggests that the Huangling Massif might have been the watershed of the middle reaches of the Paleo-Yangtze River since the Cretaceous.At that time,the rivers flowed westward into the Sichuan Basin and eastward into the Jianghan Basin.The subduction of the Pacific Plate beneath the Asian continent in the Mesozoic deeply influenced the geomorphic evolution of the South China Block.

关 键 词：APATITE ZIRCON (U-Th)/He fission track Huangling Massif Yangtze River 

分 类 号：P534.5[天文地球—古生物学与地层学] P542[天文地球—地质学]