The Coupling Relationship between the Uplift of Longmen Shan and the Subsidence of Foreland Basin,Sichuan,China  

作　　者：LI Yong YAN Liang SHAO Chongjian WANG Zhengjiang YAN Zhaokun YU Qian ZHOU Rongjun LI Haibin 

机构地区：[1]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China [2]Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation,Ministry of Landand Resources,College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China [3]Chengdu Center,China Geological Survey,Chengdu 610081,China [4]Institute of Earthquake Engineering,Seismological Bureau of Sichuan Province,Chengdu 610041,China [5]Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China

出　　处：《Acta Geologica Sinica(English Edition)》2017年第2期379-395,共17页地质学报（英文版）

基　　金：funded by China National Natural Science Foundation(No:41372114,41502116,41340005,40841010,40972083,41172162,and 41402159);geological survey from China Geological Survey(No:121201010000150004–08 and 12120115004501–01);the project of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(No:SK–0801)

摘　　要：Depending on the analysis of the coeval sedimentary geometry and subsidence mechanism in the Longmen Shan foreland basin, three models about the coupling relationship between Longmen Shan uplift and foreland basin subsidence since the Indosinian have been proposed：（1） crustal shortening and its related wide wedge-shaped foreland basin,（2） crustal isostatic rebound and its related tabular foreland basin, and（3） lower crustal flow and its related narrow wedge-shaped foreland basin. Based on the narrow wedge-shaped foreland basin developed since 4 Ma, it is believed that the narrow crustal shortening and tectonic load driven by lower crustal flow is a primary driver for the present Longmen Shan uplift and the Wenchuan（Ms 8.0） earthquake.Depending on the analysis of the coeval sedimentary geometry and subsidence mechanism in the Longmen Shan foreland basin, three models about the coupling relationship between Longmen Shan uplift and foreland basin subsidence since the Indosinian have been proposed：（1） crustal shortening and its related wide wedge-shaped foreland basin,（2） crustal isostatic rebound and its related tabular foreland basin, and（3） lower crustal flow and its related narrow wedge-shaped foreland basin. Based on the narrow wedge-shaped foreland basin developed since 4 Ma, it is believed that the narrow crustal shortening and tectonic load driven by lower crustal flow is a primary driver for the present Longmen Shan uplift and the Wenchuan（Ms 8.0） earthquake.

关 键 词：coupling relationship foreland basin subsidence Longmen Shan uplift eastern margin of Tibetan Plateau SICHUAN China Proto-Tethys 

分 类 号：P315.2[天文地球—地震学]