昆仑8.1级地震对青藏块体东北缘地壳水平运动的影响初探

英文篇名：Preliminary study on the influence of earthquake to crustal horizontal movement of northeastern margin of Qinghai-Tibet block
中文刊名：测绘科学
英文刊名：Science of Surveying and Mapping
作者：于志忠 ; 冯丽丽 ; 李天文 ; 梁伟峰 ; 王庆良 ; 崔笃信
英文作者：YU Zhi-zhong① ; FENG Li-li② ; LI Tian-wen② ; LIANG Wei-feng③ ; WANG Qing-liang③ ; CUI Du-xin③(①Department of Surveying and Mapping of Geology and Mineral Resources ; Changchun 130062 ; China ; ②Department of Urban and Resources Science ; Northwest University ; Xi’an 710069 ; China ; ③Second Crust Monitoring and Application Center ; CEA ; Xi’an 710054 ; China)
中文关键词：GPS ; Okada位错模型 ; 青藏块体东北缘 ; 地壳水平运动
英文关键词：GPS ; Okada dislocation model ; the northeastern margin of Qinghai_Tibet block ; horizontal crustal movement
出版日期：2007-05-20
机构：吉林省地矿测绘院,西北大学城市与资源学系,西北大学城市与资源学系,中国地震局第二监测中心,中国地震局第二监测中心,中国地震局第二监测中心长春130062,西安710069,西安710069,西安710054,西安710054,西安710054
年：2007
期：03
出版单位：测绘科学

摘要

为了探讨昆仑8.1级地震引起的同震形变是否影响了青藏块体东北缘的地壳水平运动,以震后GPS观测资料为数据源,依Okada位错模型原理,计算了地震引起的同震水平位移场,分析了地震对区域地壳水平运动的影响。结果表明:垂直于断层沿震中方向的GPS点受地震影响大,远离断层的测点的同震位移受断层位错的影响小。
The 14 November, 2001, Ms 8.1 west Kunlun earthquake is the largest event that has occurred in the Tibetan Plateau since 1951. In order to examine the influence of the earthquake on the crustal motion, taking Kunlun Ms 8.1 earthquake as an example, using GPS data measured after Kunlun Ms 8.1earthquake as data source, and using Okada dislocation model as principle, the authors compute the coseismic horizontal displacement field. They also analyze the effect on local crustal horizontal motion. The results indicate that the GPS spots which plumb the fault along epicenter direction are more affected, while the influences of fault dislocation to the co-meismic displacement of the spots is less.

引文

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