GPS DATA INVERSION OF KINEMATIC MODEL OF MAIN FAULTS IN YUNNAN

作     者：Shen Chongyang, Wu Yun, Wang Qi, You Xinzhao and Qiao Xuejun (Institute of seismology, CEA, Wuhan 430071, China) 

作者机构：Institute of seismology CEA Wuhan 430071 China 

出 版 物：《大地测量与地球动力学》 (Journal of Geodesy and Geodynamics)

年 卷 期：2003年第23卷第B12期

页      面：62-68页

核心收录：

学科分类：08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 

基　　金：SupportedbyNationalNaturalScienceFund (4 0 0 740 2 4) National‘TenthFiveyearProjectofS .andT .’(2 0 01BA60 1B0 2 ).National‘973’Project(G1998040703)andSeimogicalScienceJointFund(10 10 0 5 ) 

主　　题：云南 GPS数据 断层运动 动态模型 非线形逐步逼近反向方法 最大切变应力 观测数据 

摘      要：On the basis of GPS observations in Yunnan from 1999 to 2001, we adopt the robust Bayesian least square estimation and multi fault dislocation model to analyze the quantitative kinematics models of the main faults in Yunnan. The geodetic inversion suggests that: (1) The horizontal movement of crust in Yunnan is affected distinctly by fault activity whose characters are consistent with geological results; (2) The activity of the north segment of the Red River fault zone is maximum, in the middle segment is moderate, and in the south segment is minimum; (3)Among others, the Xiaojiang fault zone has the strongest activity, the secondary are the Lancang fault zone and the north segment of Nujiang fault zone, the Qujiang fault zone shows the characteristic of hinge fault; (4)Each fault could produce an earthquake of M s=6 more or less per year; (5) The larger value of maximum shear strain are mostly located along the main active fault zones and their intersections; earthquakes did not occur at the place of maximum shear strain, and mostly take place at the higher gradient zones, especially at its corner.