西北地震学报2012，Vol.34Issue(3)：256-263,8.DOI:10.3969/j.issn.1000-0844.2012.03.0256
2008年于田7.3级地震前西昆仑地形变的GPS初步研究
Crustal Deformation in Western Kunlun Tectonic Zone from GPS Measurements before the Yutian Ms7.3 Earthquake in 2008
摘要
Abstract
Using the data of GPS measurements, the velocity field of present crustal movement before the Yutian Ms7. 3 earthquake in 2008 in the Western Kunlun tectonic zone, Xinjiang region, is calculated, and the active rates of regional maijor faults are estimated by analyzing the velocity field. The result shows that the active feature of Longmucuo fault at south of the earth-quake epicenter is left-lateral strick sliping with rate of 1. 2～2. 5 mm/a, the sliping rate of Altyn-tagh left-lateral fault at north of the epicenter is about 5 mm/a, and the sliping rate of Kangxiwa left-lateral fault at northweast of the epicenter is 3～7 mm/a. The distribution of regional strain field is affected in some extent by the distribution of faults in the region. Yutian Ms7. 3 earth-quake occurred at faults intersection zone and also the maximum shear strain rate zone.关键词
于田7.3级地震/GPS测量/西昆仑构造带/水平运动/滑动速率/最大剪应变Key words
Yutian MS7. 3 earthquake/GPS measurement/The west Kunlun tectonics zone/Hori-zontal movement/Sliping rate/Maximum shear strain rate分类
天文与地球科学引用本文复制引用
李杰,王晓强,王琪,方伟,宋和平..2008年于田7.3级地震前西昆仑地形变的GPS初步研究[J].西北地震学报,2012,34(3):256-263,8.基金项目
地震科技星火计划(XH1030) （XH1030）
地震联合基金(A08056) （A08056）
新疆维吾尔自治区科学研究和技术开发(含攻关)项目(200741121) （含攻关）
地震行业科研专项(201008004) （201008004）
