地震学报（英文版）2004，Vol.17Issue(z1)：43-51,9.
Geometric form of Haiyuan fault zone in the crustal interior and dynamics implications
Geometric form of Haiyuan fault zone in the crustal interior and dynamics implications
摘要
Abstract
The deep seismic reflection data on profile HY2 are reprocessed by the method of simultaneous inversion of veloc-ity distribution and interface position. By the travel-time inversion with the data of the diving wave Pg and faultplane reflection wave, we determine the geometric form and velocity of Haiyuan fault zone interior and surroundingrock down to 10 km depth. The measured data show that the amplitudes have strong attenuation in the range of stakenumber 37～39 km, suggesting the fault zone has considerable width in the crustal interior. The results of this paperindicate that to the north of the fault zone the crystalline basement interface upheaves gradually from southwest tonortheast and becomes shallow gradually towards northeast, and that to the south of the fault zone, within the basinbetween Xihua and Nanhua mountains, the folded basement becomes shallow gradually towards southwest. Theobliquity of the fault zone is about 70° above the 3 km depth, about 60° in the range of the 3～10 km depths. From theresults of this paper and other various citations, we believe that Haiyuan fault zone is in steep state from the Earth'ssurface to the depth of 10 km.关键词
Haiyuan fault zone/travel-time inversion/fault plane reflection waveKey words
Haiyuan fault zone/travel-time inversion/fault plane reflection wave分类
天文与地球科学引用本文复制引用
樊计昌,李松林,张先康,刘明军..Geometric form of Haiyuan fault zone in the crustal interior and dynamics implications[J].地震学报（英文版）,2004,17(z1):43-51,9.基金项目
Joint Seismological Science Foundation of China (201001) and State Key Basic Research Development and Programming Project (95-13-02-02). （201001）
