The Coupling Relationship between the Uplift of Longmen Shan and the Subsidence of Foreland Basin, Sichuan, China |
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| Authors: | LI Yong YAN Liang SHAO Chongjian WANG Zhengjiang YAN Zhaokun YU Qian ZHOU Rongjun and LI Haibin |
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| Institution: | 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 Land
and Resources, College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China,1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology,
Chengdu 610059, China,3 Chengdu Center, China Geological Survey, Chengdu 610081, China,1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, 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 and 5 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | 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. |
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| Keywords: | coupling relationship foreland basin subsidence Longmen Shan uplift eastern margin of |
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