气候变化领域集成服务门户(CCPortal): Duplex in the Main Himalayan Thrust illuminated by aftershocks of the 2015 M w 7.8 Gorkha earthquake

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DOI	10.1038/s41561-019-0474-8
	Duplex in the Main Himalayan Thrust illuminated by aftershocks of the 2015 M w 7.8 Gorkha earthquake
	Mendoza M.M.; Ghosh A.; Karplus M.S.; Klemperer S.L.; Sapkota S.N.; Adhikari L.B.; Velasco A.
发表日期	2019
ISSN	17520894
卷号	12 期号:12
英文摘要	In April 2015, the lower locked portion of the Main Himalayan Thrust ruptured beneath Nepal, causing the disastrous Mw 7.8 Gorkha earthquake. Elucidating the enigmatic geometry of this plate boundary fault is important for understanding the nucleation and arrest of large earthquake ruptures as well as the seismic hazard, topography and tectonics of the Himalaya. Here we interpret the geometry of the Main Himalayan Thrust from the spatial distribution and rupture patterns of a dynamic sequence of aftershocks following the Gorkha earthquake, which were recorded by a rapidly deployed dense seismic network. We find that the thrust comprises two north-dipping subhorizontal planes that are connected by a system of bounded imbricate thrust faults; this structure is known as a duplex. We propose that this duplex acts as an impediment to plate convergence and accommodates tectonic stress along its complex system of faults. Such a prominent structure to the Main Himalayan Thrust is consistent with surface geological studies but challenges geophysically derived conventional models with simpler geometries. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	aftershock; earthquake magnitude; earthquake rupture; Gorkha earthquake 2015; plate boundary; plate convergence; spatial distribution; tectonic setting; thrust; Himalayas; Nepal
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124553
作者单位	Department of Earth and Planetary Sciences, University of California, Riverside, CA, United States; Department of Geological Sciences, University of Texas at El Paso, El Paso, TX, United States; Department of Geophysics, Stanford University, Stanford, CA, United States; Department of Mines and Geology, Kathmandu, Nepal
推荐引用方式 GB/T 7714	Mendoza M.M.,Ghosh A.,Karplus M.S.,et al. Duplex in the Main Himalayan Thrust illuminated by aftershocks of the 2015 M w 7.8 Gorkha earthquake[J],2019,12(12).
APA	Mendoza M.M..,Ghosh A..,Karplus M.S..,Klemperer S.L..,Sapkota S.N..,...&Velasco A..(2019).Duplex in the Main Himalayan Thrust illuminated by aftershocks of the 2015 M w 7.8 Gorkha earthquake.Nature Geoscience,12(12).
MLA	Mendoza M.M.,et al."Duplex in the Main Himalayan Thrust illuminated by aftershocks of the 2015 M w 7.8 Gorkha earthquake".Nature Geoscience 12.12(2019).