地震工程学报2017，Vol.39Issue(z1)：7-13,19,8.DOI:10.3969/j.issn.1000-0844.2017.Supp.07
基于GPS资料分析银川盆地地壳运动特征
Study of Crustal Movement Features in Yinchuan Basin Based on GPS Data
摘要
Abstract
Using GPS data for the Yinchuan Basin and adj acent regions,in this paper,we describe the characteristics of the current crustal horizontal movement.We investigated the tectonic dy-namics and seismic risk in the Yinchuan Basin by analyzing the spatial distribution characteristics of the principal strain rate,surface expansion rate,maximum shear strain rate,and small earth-quakes.The results show that the main movement of the eastern piedmont fault of Helanshan and the northern section of the Yellow River fault is extensional strike-slip,whereas the southern section of the Yellow River fault is dominated by strike-slip movement.The principal strain rate of the Yinchuan Basin is higher than that of the surrounding blocks.The surface expansion and maximum shear strain rates in the basin also show strong tensile and shear deformations.The Yellow River fault and the eastern piedmont fault of Helanshan show strong strain accumulation,which indicates a relatively strong seismic risk.关键词
银川盆地/GPS速度场/应变场/地震危险性Key words
Yinchuan basin/GPS velocity filed/strain filed/seismic risk分类
天文与地球科学引用本文复制引用
刘雷,朱良玉,蒋峰云..基于GPS资料分析银川盆地地壳运动特征[J].地震工程学报,2017,39(z1):7-13,19,8.基金项目
国家自然科学基金青年科学基金项目(41604015) （41604015）
