气候变化领域集成服务门户(CCPortal): Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

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DOI	10.1029/2019JB018634
	Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau
	Lei J.; Li Y.; Oskin M.E.; Wang Y.; Xiong J.; Xin W.; Hu X.; Zhong Y.; Liu F.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	Seismogenic faults are commonly composed of a series of segments, revealed by geometric barriers and along-strike gradients in fault activity. At the northeastern margin of the Tibetan Plateau, the Minle-Damaying Fault (MDF), bounding a portion of the eastern Qilian Shan, illustrates segmented paleoseismic behavior of a major seismogenic reverse fault. Field surveys, trench excavations, and drone-surveyed topography along the MDF reveal scarps with diverse cumulative displacements. Multiple events, with timing constrained by radiocarbon dating, are identified by both trench exposures and analysis of deformed landforms. Both individual coseismic displacements and slip rates taper toward the ends, revealing repeated rupture of the western MDF segment. Not all events present at the center of this segment appear at sites closer to the fault tips, suggesting that some earthquakes did not everywhere rupture to the surface. Isolated rupture of the western segment would produce a Mw7.0 earthquake. However, we cannot rule out correlation of some paleo-earthquakes between two segments, corresponding to larger events. A cluster of two 7-m slip events occurred on the eastern segment in the past 1,000 years, one of which may correspond to a multisegment event. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	activity level; fault growth; segment relation; segmented thrusting; slip pattern
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/187959
作者单位	Key Laboratory of Earth Surface Processes of Ministry of Education, Peking University, Beijing, China; Department of Earth and Planetary Sciences, University of California, Davis, CA, United States; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China
推荐引用方式 GB/T 7714	Lei J.,Li Y.,Oskin M.E.,et al. Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau[J],2020,125(2).
APA	Lei J..,Li Y..,Oskin M.E..,Wang Y..,Xiong J..,...&Liu F..(2020).Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Lei J.,et al."Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau".Journal of Geophysical Research: Solid Earth 125.2(2020).