气候变化领域集成服务门户(CCPortal): Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms 8.0 earthquake, Sichuan, China

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DOI	10.1016/j.tecto.2009.08.039
	Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms 8.0 earthquake, Sichuan, China
	Pei, Shunping; Su, Jinrong; Zhang, Haijiang; Sun, Youshun; Toksoez, M. Nafi; Wang, Zhi; Gao, Xing; Jing Liu-Zeng; He, Jiankun
通讯作者	Pei, SP (通讯作者)
发表日期	2010
ISSN	0040-1951
起始页码	211
结束页码	217
卷号	491 期号:1-4
英文摘要	We present three-dimensional (3D) seismic compressional wave velocity (V(p)), shear wave velocity (V(s)) and V(p)/V(s) models around the Longmen Shan fault, Sichuan, China region, using aftershocks associated with the 2008 Wenchuan Ms 8.0 earthquake. The velocity and ratio models are obtained using a new version of the double-difference seismic tomography code tomoDDPS (Zhang, 2003) to simultaneously solve for V(p), V(s), V(p)/V(s) and event locations. The data used in inversion include 73,013 P arrival times, 62,287 S arrival times and 61,823 S-P travel times recorded by 63 stations from both permanent and temporary networks in a region 400 km northeast-southwest by 200 km northwest-southeast. The velocity model shows structure heterogeneity both along and across the fault zone. Generally, the velocity model is consistent with the local geology, with older rocks having high velocity and younger rocks having low velocity. The Longmen Shan fault zone is a clear boundary in V(p), V(s), and V(p)/V(s) ratio. Down to the depth around 15 km, higher V(p) and V(s) and lower V(p)/V(s) ratio exist to the west of the fault, corresponding to the Songpan-Ganze Fold System, while lower V(p) and V(s) and higher V(p)/V(s) ratio exist to the east, corresponding to the Sichuan Basin. Along the fault zone, the velocity structure is generally consistent with various rupture slip models, with two high velocity bodies corresponding well to the two large slip patches. This shows the structure control on the slip distribution along the fault plane. (C) 2009 Elsevier B.V. All rights reserved.
关键词	DOUBLE-DIFFERENCE TOMOGRAPHY CALIFORNIA FAULT
英文关键词	Wenchuan earthquake; Double-difference tomography; Seismic structure; Aftershocks
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000281943600019
来源期刊	TECTONOPHYSICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257798
推荐引用方式 GB/T 7714	Pei, Shunping,Su, Jinrong,Zhang, Haijiang,et al. Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms 8.0 earthquake, Sichuan, China[J]. 中国科学院青藏高原研究所,2010,491(1-4).
APA	Pei, Shunping.,Su, Jinrong.,Zhang, Haijiang.,Sun, Youshun.,Toksoez, M. Nafi.,...&He, Jiankun.(2010).Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms 8.0 earthquake, Sichuan, China.TECTONOPHYSICS,491(1-4).
MLA	Pei, Shunping,et al."Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms 8.0 earthquake, Sichuan, China".TECTONOPHYSICS 491.1-4(2010).