地震学报（英文版）2007，Vol.20Issue(6)：617-627,11.
Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region
Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region
摘要
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 distribution and discuss the dynamic mechanism of crustal motion and deformation in the Sichuan-Yunnan region. Linear Maxwell visco-elastic model is applied, which includes the active fault zones, the elastic upper crust and viscous 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.关键词
Sichuan-Yunnan region/ crustal motion/ lower-crustal flow/ numerical simulationKey words
Sichuan-Yunnan region/ crustal motion/ lower-crustal flow/ numerical simulation分类
天文与地球科学引用本文复制引用
WANG Hui,CAO Jian-ling,ZHANG Huai,ZHANG Guo-min,SHI Yao-lin,SHEN Xu-hui..Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region[J].地震学报（英文版）,2007,20(6):617-627,11.基金项目
Ministry of Science and Technology (2004CB418406, 2005DKA64000) and the Basic Science Research Plan of the Institute of Earthquake Science, China Earthquake Administration (02076902-03). （2004CB418406, 2005DKA64000）
