Crustal Deformation of the North China District from GPS Measurements
Based on Gaussian Distance Weighting Grids Method
1 Institute of Earthquake Science,CEA, 63 Fuxing Road, Beijing 100036, China
2 College of Surveying and Gao\|Informatics,Tongji University, 1239 Siping Road, Shanghai 200092, China
3 First Crust Monitoring and Application Center, CEA, 7 Naihuo Road, Tianjin 300180, China
Abstract：Based on Gaussian distance weighting theory, the paper developed a MATLAB program to compute variables as strain rate in the average distributed grid points in the North China district by using the GPS horizontal velocity derived from GPS observation data from 1997 to 2009. The computing results proved that it is reasonable to choose 150 km as the Gaussian smooth radius. The capital area displayed left\|lateral shear along the Zhang\|Bo fault zone, while the Tangshan-Qinhuangdao district had extensional performance in the north-south direction. The Shanxi belt presented right-lateral shear deformation overall, with tension deformation in the north part and extrusion movement in the south part. The deformation along the Tan-Lu fault zone was insignificant but with small shear movement in part of its north and south districts. The Ordos block was stable in the interior, but displayed left\|lateral shear accompanied by extension in the north rim and extrusion in the west rim. The Qinling block that is in the south rim of Ordos block displayed left\|lateral shear and right-lateral shear at its north and south sides respectively, along with extrusion and extension at its west and east sides.
WU Weiwei,MENG Guojie,SU Xiaoning et al. Crustal Deformation of the North China District from GPS Measurements
Based on Gaussian Distance Weighting Grids Method[J]. jgg, 2015, 35(1): 7-12.
