Study on Three-Dimensional Movement of the Longmenshan Fault Zone Based on the Disclination-Dislocation Model
Abstract In order to study the three-dimensional movement of Longmenshan fault, the disclination-dislocation model of describing fault slip and rotation is proposed and used. The three-dimensional sliding and rotation of the main rupture zone is inverted with the particle swarm optimization methodand by using the measured data of GPS co-seismic data from 2008. The sliding results are contrasted with previousresearch results, and finally the reliability of the inversion results is further verified. The theoretical analysis and model calculation consequents illustrate that: firstly, the main feature of the source rupture is reverse thrusting and dextral strike-slip; secondly, the sliding and rotation of Longmenshan fault has obvious segmentation characteristics; thirdly, the seismic moment MO is 7.069×1020 Nm and the MW is 7.899 of Wenchuan earthquake. The inversed results by using the disclination-dislocation model are consistent with previous studies, therefore, the model is applicable for studying the fault activity.
Key words :
disclination-dislocation model
co-seismic
GPS
inversion
rotation
Cite this article:
YANG Zhen,ZHANG Yongzhi,ZHANG Wenjun et al. Study on Three-Dimensional Movement of the Longmenshan Fault Zone Based on the Disclination-Dislocation Model
[J]. jgg, 2017, 37(3): 224-229.
YANG Zhen,ZHANG Yongzhi,ZHANG Wenjun et al. Study on Three-Dimensional Movement of the Longmenshan Fault Zone Based on the Disclination-Dislocation Model
[J]. jgg, 2017, 37(3): 224-229.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2017/V37/I3/224
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