气候变化领域集成服务门户(CCPortal): Surface Slip Distribution Along the West Helanshan Fault, Northern China, and Its Implications for Fault Behavior

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DOI	10.1029/2020JB019983
	Surface Slip Distribution Along the West Helanshan Fault, Northern China, and Its Implications for Fault Behavior
	Bi H.; Zheng W.; Lei Q.; Zeng J.; Zhang P.; Chen G.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	High-resolution topographic data sets have now become increasingly available, which allows for remotely measuring and analyzing offset features and their associated slip distributions at a very high resolution along a fault, hence providing important insights into the fault behavior. The West Helanshan Fault is a Holocene active right-lateral strike-slip fault located at the junction of the Tibetan Plateau, Alashan, and Ordos blocks. In this study, a 2-m-resolution DEM of the West Helanshan Fault was built from the WorldView-3 stereo satellite images (0.5 m). Combined with the high-resolution topography acquired from the Unmanned Aerial Vehicle (UAV) images based on the Structure from Motion (SfM) method, a total of 180 lateral offsets and 201 vertical displacements were acquired along ~50 km of the fault. By statistical analysis of the offset observations and constructing the cumulative slip profiles, we conclude that large paleoearthquakes have produced characteristic slip accumulation along the fault with a right-lateral slip of ~3 m and a vertical slip of ~1 m, rupturing at least two segments of the fault simultaneously, which corresponds to a moment magnitude of Mw 7.1 ~ 7.5. The cumulative slip profiles suggest that the fault has likely propagated northward over its lifetime, and the south segment may be the most mature section of the fault where larger coseismic slip of earthquake ruptures may occur. The ratio of lateral to vertical displacement has remained constant (~3:1) through multiple successive events, indicating that the fault has maintained the same kinematic style over the last few thousands of years. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	fault behavior; high-resolution topographic data; surface slip distribution; the West Helanshan Fault
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187754
作者单位	State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China; Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou, China; Ningxia Seismological Bureau, Yinchuan, China; State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Bi H.,Zheng W.,Lei Q.,et al. Surface Slip Distribution Along the West Helanshan Fault, Northern China, and Its Implications for Fault Behavior[J],2020,125(7).
APA	Bi H.,Zheng W.,Lei Q.,Zeng J.,Zhang P.,&Chen G..(2020).Surface Slip Distribution Along the West Helanshan Fault, Northern China, and Its Implications for Fault Behavior.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Bi H.,et al."Surface Slip Distribution Along the West Helanshan Fault, Northern China, and Its Implications for Fault Behavior".Journal of Geophysical Research: Solid Earth 125.7(2020).