Characteristics of the fault-related rocks, fault zones and the;principal slip zone in the Wenchuan Earthquake Fault Scientific Drilling;Project Hole-1 (WFSD-1)

doi:10.1016/j.tecto.2012.08.021

	Characteristics of the fault-related rocks, fault zones and the;principal slip zone in the Wenchuan Earthquake Fault Scientific Drilling;Project Hole-1 (WFSD-1)
	Li, Haibing 6; Wang, Huan ; Xu, Zhiqin ; Si, Jialiang ; Pei, Junling 2; Li, Tianfu ; Huang, Yao 3; Song, Sheng-Rong ; Kuo, Li-Wei ; Sun, Zhiming 2
刊名	TECTONOPHYSICS
	2013
卷号	584;SI SI 页码:23-42
关键词	Wenchuan earthquake fault scientific drilling project (WFSD) Yingxiu-Beichuan fault zone Fault-related rocks Principal slip zone (PSZ) Wenchuan earthquake WFSD-1
ISSN号	0040-1951;EI 1879-3266
DOI	10.1016/j.tecto.2012.08.021
英文摘要	Scientific drilling in active faults after a large earthquake is ideal to study earthquake mechanisms. The Wenchuan earthquake Fault Scientific Drilling project (WFSD) is an extremely rapid response to the 2008 Ms 8.0 Wenchuan earthquake, which happened along the Longmenshan fault, eastern margin of the Tibetan Plateau. In order to better understand the fault mechanism and the physical and chemical characteristics of the rocks, the WFSD project will eventually drill 5 boreholes along the two main faults. This paper focuses on the first hole (WFSD-1), which started just 178 days after the earthquake, down to a final depth of 1201.15 m. Petrological and structural analyses of the cores allowed the identification of fault-related rocks in the Yingxiu-Beichuan fault (fault gouge, cataclasite, and fault breccia), and the Principle Slip Zone (PSZ) location of the Wenchuan earthquake was determined.;We found 12 fault zones in the entire core profile, with at least 10, including the Yingxiu-Beichuan fault zone, with a multiple cores structure and minimum width of similar to 100 m. The co-seismic slip plane of the Wenchuan earthquake at depth (corresponding to the Yingxiu-Beichuan fault zone at the outcrop), as well as its PSZ, was expected to be located at the bottom of the fault zone (at 759 m-depth). Instead, it was found at similar to 590 m-depth with 1 cm-wide fresh fault gouge, as determined by logging data such as temperature, natural gamma ray, p-wave velocity and resistivity, combined with the fresh appearance, magnetic susceptibility, and microstructure of the gouge. The Wenchuan earthquake slip plane has a dip angle of similar to 65 degrees, showing the high-angle thrust feature. The distribution of fault gouge with several meters thick, the location of the Wenchuan earthquake's PSZ and the thickness of fresh gouge all imply a correlation between the width of the fault zone and the number of seismic events. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	地震地质学
WOS关键词	COSEISMIC SHEAR ZONE ; 1999 CHI-CHI ; TECTONIC IMPLICATIONS ; CHELUNGPU-FAULT ; NOJIMA FAULT ; RUPTURE ; SICHUAN ; TAIWAN ; SUBDUCTION ; GEOMETRY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000315613700003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40091]
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. 4.6 Brigade Jiangsu Geol & Mineral Resources Bur, Lianyungang 222300, Jiangsu, Peoples R China. 5.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan. 6.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Li, Haibing,Wang, Huan,Xu, Zhiqin,et al. Characteristics of the fault-related rocks, fault zones and the;principal slip zone in the Wenchuan Earthquake Fault Scientific Drilling;Project Hole-1 (WFSD-1)[J]. TECTONOPHYSICS,2013,584;SI SI:23-42.
APA	Li, Haibing.,Wang, Huan.,Xu, Zhiqin.,Si, Jialiang.,Pei, Junling.,...&Liu, Dongliang.(2013).Characteristics of the fault-related rocks, fault zones and the;principal slip zone in the Wenchuan Earthquake Fault Scientific Drilling;Project Hole-1 (WFSD-1).TECTONOPHYSICS,584;SI SI,23-42.
MLA	Li, Haibing,et al."Characteristics of the fault-related rocks, fault zones and the;principal slip zone in the Wenchuan Earthquake Fault Scientific Drilling;Project Hole-1 (WFSD-1)".TECTONOPHYSICS 584;SI SI(2013):23-42.