Abstract:First, based on the three-disclination model, this paper simulates the surface deformation of the single fault, which has a dip angle of 60° under the different angle and direction of rotation,in order to analyze the influence of fault rotation on the size of the surface deformation field and the characteristics of spatial distribution. Second, based on the disclination-dislocation model, the surface deformation caused by fault sliding and rotation of the Xianshuihe fault zone is simulated by numerical methods and is compared with the GPS data of 2009-2015, which eliminates the overall displacement. Result show: 1) the angle of rotation is proportional to the surface deformation caused by the disclination of fault, but the displacement field direction remains the same; when the direction of rotation changes, so does the surface displacement field, but the size remains the same, with greater impact on the displacement field near the fault; 2) based on the disclination-dislocation model, the simulated results and GPS measurements of the Xianshuihe fault zone show good consistency;3) there are some characteristics of rotation in Xianshuihe fault zone, with obvious differences with every block, and a certain transformation tectonic style.
YANG Jiuyuan,ZHU Yiqing,XU Yunma et al. Surface Deformation of the Xianshuihe Fault Zone Simulated by Disclination-Dislocation Model[J]. jgg, 2017, 37(7): 692-396.