| Dynamic Analysis of Deformational Structures of the Xiannüshan Fault Zone in the Three Gorges of the Yangtze River |
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| 作者姓名： | WU Shuren |
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| 作者单位： | Institute of Geomechanics,CAGS, Beijing 100081,China University of Geosciences, Beijing 100083 |
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| 基金项目： | 中国科学院资助项目;49772145; |
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| 摘 要： | Field investigation and laboratory work reveal that inhomogeneity of the deformation of the Xiannüshan fault is mainly characterized by lateral zonation, longitudinal segmentation and downward stratification. Based on these results, a 3-D deformational structure model of the fault was established and its geometrical and kinematic characteristics in two main deformational stages i.e. the main Yanshanian and Himalayan were discussed. The directions of principal and the differential stresses in these two stages were determined by using conjugate joints, striations of fault planes and microstructures of the fault zone. The direction of (1 is N-S in direction with differential stresses of 150(250 MPa in the Yanshanian, and N70E with a differential stress ranging from 80-120 MPa in the Himalayan.
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| 关 键 词： | three gorges of the Yangtze River Xiannüshan fault fault deformation structure differential stress |
Dynamic Analysis of Deformational Structures of the Xiannüshan Fault Zone in the Three Gorges of the Yangtze River |
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| Authors: | WU Ganguo |
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| Abstract: | Field investigation and laboratory work reveal that
inhomogeneity of the deformation of the Xiannüshan fault is mainly characterized by
lateral zonation, longitudinal segmentation and downward stratification. Based on these
results, a 3-D deformational structure model of the fault was established and its
geometrical and kinematic characteristics in two main deformational stages i.e. the main
Yanshanian and Himalayan were discussed. The directions of principal and the differential
stresses in these two stages were determined by using conjugate joints, striations of
fault planes and microstructures of the fault zone. The direction of (1 is N-S in
direction with differential stresses of 150(250 MPa in the Yanshanian, and N70E with a
differential stress ranging from 80-120 MPa in the Himalayan. |
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| Keywords: | three gorges of the Yangtze River Xiannüshan fault fault deformation structure differential stress |
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