摘要
依据GPS观测的青藏块体内部的水平运动以及跨断层形变观测结果的总体异常特征 ,对昆仑山口西8.1级地震引起的近期地壳运动变化特征进行了分析。结合中国西部的受力环境 ,讨论了青藏块体内部不同断裂带力学上的相互关联。认为 2 0 0 2年 12月 14日玉门 5 .9级地震与昆仑山口西 8.1级地震之间存在着构造和力学上的内在联系 ,它可能是在昆仑山口西 8.1级地震的影响下 ,青藏块体北缘地区相关构造局部应力场适应性调整的产物。
On the basis of total abnormal characteristic of the horizontal movement inside Qinghai Tibet block measured by GPS and the deformation obtained with cross fault survey,the feature of recent crust movement due to earthquake of \%M\%s8.1 occurred in the west to Kunlun mountain pass are analyzed. Combining with stress environment in west China, the mechanical relationship between different faults inside Qinghai Tibet block are discussed.It is considered that there is an inner mechanical and tectonic link between the 14 December 2002 \%M\%s5.9 Yumen earthquake and the \%M\%s8.1 Kulun mountain pass event,the former may result from the correspondent adjustment of the local stress field of related tectonics in the northern margin of Qinghai Tibet block and this adjustment may straight be affected by the 8.1 earthquake.
出处
《大地测量与地球动力学》
CSCD
2003年第2期23-28,共6页
Journal of Geodesy and Geodynamics
基金
地震联合基金 ( 10 1118)
国家自然科学基金 ( 4 0 2 740 2 3 )
关键词
构造形变
GPS
水平运动
断层形变
动力响应
地震
Yumen earthquake(\%M\%s5.9), \%M\%s8.1 earthquake in the west to Kunlun mountain pass, block movement, dynamic correspondence
