地震学报（英文版）2006，Vol.19Issue(5)：514-521,8.
Evaluation of micro-behavior of strain field in Chinese mainland with the GPS time series
Evaluation of micro-behavior of strain field in Chinese mainland with the GPS time series
摘要
Abstract
Based on the time series of GPS station coordinate in the international Earth reference frame (ITRF), we evaluate annual micro-behavior of strain field in Chinese mainland with the triangle method. The results show that the annual micro-behavior of strain field is divided into two parts by the north-south earthquake belt in the research region. The prevailing direction of compressive principal strain field is nearly consistent in the western region. From west to east,the direction varies from NS to NE. It is in accordance with the direction of the modern compressive principal strain field. This suggests that geologic deformation in western region was mainly caused by that India tectonic plate pushes the research region northward and the Siberia plate pushes it southward relatively. It is an inheritance of new tectonic motion. The prevailing direction of the compressive principal strain field does not exist in the eastern region .The annual biggest shear strain is different greatly in every grid-cell. The values varies from 4.13×10-8 to 7.0×10-10. By and large the annual biggest shear strain in the western region is bigger than that in the eastern region. And so is the variation between any two consecutive biggest annual shear strains in the same grid-cell. The annual surface dilatation show that in most grid-cells of the research region the surface dilatation is in compressibility, and the variation between any two consecutive annual surface dilatation in the same grid-cell is small.关键词
GPS time series/micro-behavior of strain field/annual strain fieldKey words
GPS time series/micro-behavior of strain field/annual strain field分类
天文与地球科学引用本文复制引用
JING Shao-qun,WANG Jia-wei,WU Yun,ZHOU Shuo-yu,SHI Shun-ying..Evaluation of micro-behavior of strain field in Chinese mainland with the GPS time series[J].地震学报（英文版）,2006,19(5):514-521,8.基金项目
National Natural Science Foundation of China (40074024). （40074024）
