南天山及帕米尔高原现代地壳水平形变  

RECENT HORIZONTAL CRUSTAL DEFORMATION IN TIANSHAN AND PAMIR PLATEAU AREA

作　　者：王治民[1] 王晓强[1] 朱令人[1] 王琪[2] 李杰[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：《高原地震》2007年第3期29-34,共6页Plateau Earthquake Research

基　　金："九五"国家科技重点项目(96-913-07-03);国家基础规划项目(95-13-05-04)资助课题

摘　　要：通过对南天山及帕米尔高原GPS监测网的观测，获得了该地区的现今地壳形变速率图、基线变化图、应变图及主要地质构造带的断裂位移。结果表明，南天山及帕米尔地区地壳运动幅度较大，受印度板块的推挤作用，地壳正快速缩短变形，并且该区域的地壳形变具有自西向东、自南向北减弱的特点。另外，南天山地震断裂带以每年5～10mm的速度吸收来自帕米尔高原向北推挤的运动速率。通过研究还发现，喀什以西地区是强剪应力汇集的地区，地壳活动极其复杂、强烈。Based on the result observed by GPS network in south Tianshan and Pamir Plateau, the crustal deformation rate map, baseline varying map, strain map, and the fault displacements of main geological structure zones were obtained. It is shown that the crustal movement in south Tianshan and Pamir Plateau has large amplitude which is pushed and squeezed by the India Plate, and is shortening and deforming rapidly, and the deformation tends is decreased from west to east and from south to north. In addition, the south Tianshan seismic belt absorbs the rate from the pressure toward north acted by Pamir Plateau by the rate of 5 ～ 10 mm a year. It is also discovered that there is strong shearing stress converging in the area of western Kashi in Xinjiang, where the crustal activity is extremely stron~ and complex.

关 键 词：GPS监测网 地壳形变 地震活动 帕米尔高原 

分 类 号：P542[天文地球—构造地质学]