Rupture process of the Wenchuan earthquake (Mw 7.9) from surface ruptures and fault striations characteristics

doi:10.1016/j.tecto.2013.06.028

	Rupture process of the Wenchuan earthquake (Mw 7.9) from surface ruptures and fault striations characteristics
	Pan, Jiawei 5; Li, Haibing ; Si, Jialiang ; Pei, Junling 2; Fu, Xiaofang 3; Chevalier, Marie-Luce ; Liu, Dongliang 1
刊名	TECTONOPHYSICS
	2014
卷号	619 页码:13-28
关键词	Wenchuan earthquake Rupture process Surface rupture Striations Geometry
ISSN号	0040-1951
DOI	10.1016/j.tecto.2013.06.028
英文摘要	On 12 May 2008, the Wenchuan earthquake (Mw 7.9) produced complicated thrust-type co-seismic surface rupture zones, which encompass the dextral-slip thrust of the Yingxiu-Beichuan fault, the approximately pure thrust of the Guanxian-Anxian fault, and the sinistral-slip thrust of the Xiaoyudong rupture zone located between the former two. In order to understand the faulting mechanism, we discuss the rupture process by examining the segmentation and kinematics of the surface rupture zones, together with the co-seismic fault striations at various sites. Based on the two along-strike main displacement peaks (6-6.5 m and 11-12 m) and on the different geometric and kinematic patterns for the southern and northern segments of the surface rupture zones, we find that the Wenchuan earthquake might have consisted of two rupture stages, which is in agreement with seismic wave inversion results. By comparing the kinematics of fault striations occurring in the Bajiaomiao and Beichuan areas, it suggests that during the first stage, thrusting along both the Yingxiu-Beichuan fault and Guanxian-Anxian fault produced the -80-100 km-long Yingxiu-Qingping surface rupture segment and the -80 km-long Guanxian-Anxian surface rupture zone, respectively. Then, faulting was triggered along the Yingxiu-Beichuan fault by the first rupture process, yielding the second rupture stage, which was characterized by dextral strike-slip (or dextral oblique thrusting). Due to the overlap between the two rupture stages, the southern segment (Yingxiu-Qingping) of the Yingxiu-Beichuan rupture zone comprises two different processes while the northern segment (Gaochuan-Beichuan-Shikan) only suggests one rupture phase. (c) 2013 Elsevier B.V. All rights reserved.
学科主题	构造地质学
WOS关键词	SLIP ; CHINA ; SICHUAN ; ZONE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000335284900002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40542]
专题	中国地质科学院地质研究所
作者单位	1.State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 4.Sichuan Acad Geol Survey, Chengdu, Peoples R China 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Pan, Jiawei,Li, Haibing,Si, Jialiang,et al. Rupture process of the Wenchuan earthquake (Mw 7.9) from surface ruptures and fault striations characteristics[J]. TECTONOPHYSICS,2014,619:13-28.
APA	Pan, Jiawei.,Li, Haibing.,Si, Jialiang.,Pei, Junling.,Fu, Xiaofang.,...&Liu, Dongliang.(2014).Rupture process of the Wenchuan earthquake (Mw 7.9) from surface ruptures and fault striations characteristics.TECTONOPHYSICS,619,13-28.
MLA	Pan, Jiawei,et al."Rupture process of the Wenchuan earthquake (Mw 7.9) from surface ruptures and fault striations characteristics".TECTONOPHYSICS 619(2014):13-28.