Tomographic Determination of the upper crustal structure in Bachu-Jiashi,Xinjiang autonomous region
A detailed tomographic image of the upper crustal structure in Bachu-Jiashi, Xinjiang autonomous region, is determined by using P- and S-wave arrival time, by Ts-Tp method proposed by author. Ts-Tp tomographic can eliminate influence of clock error on inversion result. The inversion results as following: A) P-Velocity at 2km depth is strongly horizontal heterogeneity. This phenomenon maybe is related to the uppermost sedimentary layer about 4km thickness. B) P-velocity between 5km and 14km depth suggests that there exist two high and conjugated velocity zone, one trending NE and the other NW. The NW high velocity zone is similar in the shape to the distribution of aftershocks. C) According to the relation of P velocity imaging and the faults of studied area, it is considered that the hidden Meigaiti-Xiasuhong fault pass through the crystalline basement and is a fault for Jiashi strong earthquake in 2003.
seismic tomography Ts-Tp method of seismic tomography clock error Bachu-Jiashi area upper-crust velocity structure
HeRui YangJianshi ZhangYi FenYijun
Institute of Geophysics,China Earthquake Administration,Beijing 100081,China Earthquake Administration of Xinjiang Uygur Autonomous Region Urumqi 830011 Xiangjiang China
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）