| Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region |
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| 作者姓名： | 王辉 曹建玲 张怀 张国民 石耀霖 申旭辉 |
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| 作者单位： | Institute of Earthquake Science China Earthquake Administration，Laboratory of Computational Geodynamics Graduate University of Chinese Academy of Sciences，Laboratory of Computational Geodynamics Graduate University of Chinese Academy of Sciences，Institute of Earthquake Science China Earthquake Administration，Laboratory of Computational Geodynamics Graduate University of Chinese Academy of Sciences，Institute of Earthquake Science China Earthquake Administration，Beijing 100036 China Laboratory of Computational Geodynamics Graduate University of Chinese Academy of Sciences Beijing 100049 China，Beijing 100049 China，Beijing 100049 China，Beijing 100036 China，Beijing 100049 China，Beijing 100036 China |
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| 基金项目： | Ministry of Science and Technology (2004CB418406, 2005DKA64000)，the Basic Science Research Plan of the Institute of Earthquake Science, China Earthquake Administration (02076902-03). |
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| 摘 要： | On the basis of distribution of active fault and regional rheological structure, a three-dimensional finite element model of Sichuan-Yunnan region, China, is constructed to simulate contemporary crustal motion and stress distri- bution and discuss the dynamic mechanism of crustal motion and deformation in the Sichuan-Yunnan region. Lin- ear Maxwell visco-elastic model is applied, which includes the active fault zones, the elastic upper crust and vis- cous lower crust and upper mantle. Four different models with different boundary conditions and deep structure are calculated. Some conclusions are drawn through comparison. Firstly, the crustal rotation about the eastern syntaxis of the Himalaya in the Sicuan-Yunnan region may be controlled by the special dynamic boundary condition. The drag force of the lower-crust on the upper crust is not negligible. At the same time, the main active fault zones play an important role in the contemporary crustal motion and deformation in Sichuan-Yunnan region.
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| 关 键 词： | 四川-云南区域 地壳运动 低幅度地壳移动 数字模拟 |
| 文章编号： | 1000-9116（2007）06-0617-10 |
| 收稿时间： | 2007-05-09 |
| 修稿时间： | 2007-10-08 |
Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region |
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| Wang Hui , Cao Jian-ling , Zhang Huai , Zhang Guo-min , Shi Yao-lin and Shen Xu-hui.Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region[J].Acta Seismologica Sinica(English Edition),2007,20(6):617-627. |
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| Authors: | Wang Hui Cao Jian-ling Zhang Huai Zhang Guo-min Shi Yao-lin and Shen Xu-hui |
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| Institution: | (1) Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China;(2) Laboratory of Computational Geodynamics, Graduate University of Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | On the basis of distribution of active fault and regional rheological structure, a three-dimensional finite element model of Sichuan-Yunnan region, China, is constructed to simulate contemporary crustal motion and stress distri- bution and discuss the dynamic mechanism of crustal motion and deformation in the Sichuan-Yunnan region. Lin- ear Maxwell visco-elastic model is applied, which includes the active fault zones, the elastic upper crust and vis- cous lower crust and upper mantle. Four different models with different boundary conditions and deep structure are calculated. Some conclusions are drawn through comparison. Firstly, the crustal rotation about the eastern syntaxis of the Himalaya in the Sicuan-Yunnan region may be controlled by the special dynamic boundary condition. The drag force of the lower-crust on the upper crust is not negligible. At the same time, the main active fault zones play an important role in the contemporary crustal motion and deformation in Sichuan-Yunnan region. |
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| Keywords: | Sichuan-Yunnan region crustal motion lower-crustal flow numerical simulation |
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