新疆伽师及邻近地区现今地壳形变的GPS监测与研究  

GPS MONITORING AND STUDY ON RECENT CRUSTAL DEFORMATION IN JIASHI AND ITS ADJACENT REGION IN XINJIANG,CHINA

作　　者：王晓强[1] 王琪[2] 程瑞忠[1] 乔学军[2] 李杰[1] 张永岗[1] 海力[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]中国地震局地震研究所,湖北武汉430071

出　　处：《西北地震学报》2002年第3期199-207,共9页Northwestern Seismological Journal

基　　金："九五"国家科技重点项目 (攻关 ) ( 96-913 -0 7-0 3 )资助课题

摘　　要：利用高精度数据软件对伽师及邻近地区的GPS监测网观测数据进行计算分析(基线精度达到了 10 - 8～ 10 - 9) ,获得了该地区的现今地壳形变速率图 .结果表明 ,伽师及邻近地区在印度板块的推挤作用下 ,地壳正快速缩短变形 ,主压应力为近南北方向 .各地块运动速率不同 ,平均应变率为 0 .0 4× 10 - 6 /a .Jiashi and its adjacent region in Xinjiang,China is one of the areas that are effected by plate movement strongly in China mainland,and it is also one of the areas with the strongest seismic activity at present.In order to study the crustal movement features,a large ranged, high precision GPS monitoring network is established,which consists of more than 40 points.The data surveying from 1994 to 2000 are processed by using GIPSY OA SIS Ⅱsoftware with presision of baseline between 10 -8 ～10 -9 .The image of crustal deformation ratio shows that recent tectonic movement in the western segment of Tianshan is crustal shortening and deformation in NS indirection, about 20 mm/yr,and the compression of India plate to Eurasia plate is the main dynamic source.The movement ratios are different in places,and the mean strain rate is 0.04×10 -6 /a.

关 键 词：新疆 GPS监测网 地壳形变 伽师地区 全球定位系统 印度板块 推挤作用 

分 类 号：P315.725[天文地球—地震学]