气候变化领域集成服务门户(CCPortal): Liquefaction in western Sichuan Basin during the 2008 Mw 7.9 Wenchuan earthquake, China

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DOI	10.1016/j.tecto.2016.11.001
	Liquefaction in western Sichuan Basin during the 2008 Mw 7.9 Wenchuan earthquake, China
	Jing Liu-Zeng; Wang, Peng; Zhang, Zhihui; Li, Zhigang; Cao, Zhenzhong; Zhang, Jinyu; Yuan, Xiaoming; Wang, Wei; Xing, Xiuchen
通讯作者	Jing, LZ (通讯作者)
发表日期	2017
ISSN	0040-1951
EISSN	1879-3266
起始页码	214
结束页码	238
卷号	694
英文摘要	Strong ground shaking during the 2008 Mw 7.9 Wenchuan earthquake, which occurred in the foothills of the Longmen Shan in southwestern China, resulted in widespread coseismic deformation features, such as liquefaction and water ejection. We present a systematic survey of the soil liquefaction and water ejection features caused by this major earthquake. The majority of liquefaction sites occurred along major alluvial fan-building rivers, where the water table was a few meters below the surface. While there is no clear correlation between water fountain height and peak ground acceleration, similar to 58% of liquefaction sites are located 20-35 km from the Beichuan fault Clusters of sites with anomalously high (>2 m) water ejections are located near the surface projection of the Range Front blind thrust and its splay faults. The density of anomalously high eruptions within the window surrounding the Range Front blind thrust is 3-6 times greater than outside this region. Our results suggest that geologic structures may play a role in augmenting liquefaction intensity and shaking-related seismic hazards in sedimentary basins. We speculate that the mechanism could be the amplification of shaking by fault zone structures. Alternatively, faults may act as pathways with increased vertical permeability, allowing fluids from deeper confined aquifers to migrate to and enhance liquefaction of the upper soil, as proposed previously by Wang (2007). Liquefaction associated with the Wenchuan earthquake thus demonstrates the importance of considering geologic structures other than the primary earthquake-producing fault in seismic hazard evaluation and earthquake resistance design in areas with similar geologic and hydrological settings. (C) 2016 Elsevier B.V. All rights reserved.
关键词	LOS-ANGELES BASIN SAN-ANDREAS FAULT CANTERBURY EARTHQUAKE GROUND-MOTION NOCERA-UMBRA RECURRENT LIQUEFACTION NORTHRIDGE EARTHQUAKE SITE AMPLIFICATION SOIL LIQUEFACTION PUNCHBOWL FAULT
英文关键词	Wenchuan earthquake; Soil liquefaction; Water ejection height; Fault-enhanced liquefaction
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000392038200014
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/258921
推荐引用方式 GB/T 7714	Jing Liu-Zeng,Wang, Peng,Zhang, Zhihui,et al. Liquefaction in western Sichuan Basin during the 2008 Mw 7.9 Wenchuan earthquake, China[J]. 中国科学院青藏高原研究所,2017,694.
APA	Jing Liu-Zeng.,Wang, Peng.,Zhang, Zhihui.,Li, Zhigang.,Cao, Zhenzhong.,...&Xing, Xiuchen.(2017).Liquefaction in western Sichuan Basin during the 2008 Mw 7.9 Wenchuan earthquake, China.TECTONOPHYSICS,694.
MLA	Jing Liu-Zeng,et al."Liquefaction in western Sichuan Basin during the 2008 Mw 7.9 Wenchuan earthquake, China".TECTONOPHYSICS 694(2017).