气候变化领域集成服务门户(CCPortal): LateralMoho variations and the geometry of the Main Himalayan Thrust beneath the Nepal Himalayan orogen revealed by teleseismic receiver functions

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DOI	10.1093/gji/ggy192
	LateralMoho variations and the geometry of the Main Himalayan Thrust beneath the Nepal Himalayan orogen revealed by teleseismic receiver functions
	He, Ping; Lei, Jianshe; Yuan, Xiaohui; Xu, Xiwei; Xu, Qiang; Liu, Zhikun; Mi, Qi; Zhou, Lianqing
通讯作者	Lei, JS (通讯作者)
发表日期	2018
ISSN	0956-540X
EISSN	1365-246X
起始页码	1004
结束页码	1017
卷号	214 期号:2
英文摘要	The lateral Moho variations and the geometry of the Main Himalayan Thrust under the Nepal Himalayan orogen are investigated to determine a new crustal model using a large number of high-quality receiver functions recorded by the HIMNT and HiCLIMB portable seismic networks. Our new model shows an evident and complicated lateral Moho depth variation of 8-16 km in the east-west direction, which is related to the surface tectonic features. These results suggest a non-uniformed crustal deformation, resulted from the splitting and/or tearing of the Indian plate during the northward subduction. Our migrated receiver function images illustrate a discernible ramp structure of the Main Himalayan Thrust with an abrupt downward bending close to the hypocentre of the 2015 Gorkha M-w 7.8 earthquake. The distribution of the aftershocks coincides with the present decollement structure. Integrated with previous magnetotelluric soundings and tomographic results, our results suggest that the ramp-shaped structure within the Main Himalayan Thrust could enhance stress concentration leading to the nucleation of the large earthquake. Our new crustal model provides new clues to the formation of the Himalayan orogen.
关键词	2015 GORKHA EARTHQUAKE INDIAN LITHOSPHERE BENEATH PN ANISOTROPIC TOMOGRAPHY SOUTHERN TIBET CRUSTAL STRUCTURE COLLISION ZONE STEEP SUBDUCTION PLATE BENEATH WESTERN TIBET SEISMIC CYCLE
英文关键词	Receiver function; Nepal Himalayan orogen; Moho variations; Main Himalayan Thrust; the 2015 Gorkha earthquake
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000448238600014
来源期刊	GEOPHYSICAL JOURNAL INTERNATIONAL
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/259317
推荐引用方式 GB/T 7714	He, Ping,Lei, Jianshe,Yuan, Xiaohui,et al. LateralMoho variations and the geometry of the Main Himalayan Thrust beneath the Nepal Himalayan orogen revealed by teleseismic receiver functions[J]. 中国科学院青藏高原研究所,2018,214(2).
APA	He, Ping.,Lei, Jianshe.,Yuan, Xiaohui.,Xu, Xiwei.,Xu, Qiang.,...&Zhou, Lianqing.(2018).LateralMoho variations and the geometry of the Main Himalayan Thrust beneath the Nepal Himalayan orogen revealed by teleseismic receiver functions.GEOPHYSICAL JOURNAL INTERNATIONAL,214(2).
MLA	He, Ping,et al."LateralMoho variations and the geometry of the Main Himalayan Thrust beneath the Nepal Himalayan orogen revealed by teleseismic receiver functions".GEOPHYSICAL JOURNAL INTERNATIONAL 214.2(2018).