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DOI	10.1016/j.pepi.2018.06.001
	Structure of crust and upper mantle beneath NW Himalayas, Pamir and Hindukush by multi-scale double-difference seismic tomography
	Bhatti, Zahid Imran; Zhao, Junmeng; Khan, Nangyal Ghani; Hussain, Shah Syed Tallataf
通讯作者	Zhao, JM (通讯作者)
发表日期	2018
ISSN	0031-9201
EISSN	1872-7395
起始页码	92
结束页码	102
卷号	281
英文摘要	The India-Asia collision and subsequent subduction initiated the evolution of major tectonic features in the Western Syntaxis. The complex tectonic structure and shallow to deep seismicity have attracted geoscientists over the past two decades. The present research is based on a 3D tomographic inversion of P-wave arrival time data to constrain the crustal and upper mantle structure beneath the NW Himalayas and Pamir-Hindukush region using the Double-difference tomography. We utilized a very large multi-scale dataset comprising 19,080 earthquakes recorded at 397 local and regional seismic stations from 1950 to 2017. The northward dipping seismic zone coinciding with the low velocity anomaly suggests the subduction of the Indian lower crust beneath the Hindukush. The extent of the northward advancing Indian slab increases from east to west in this region. We observed no signs of northward subduction of the Indian plate under the Hindukush beyond 71 degrees longitude. The Indian plate overturns due south after interacting with the Asian plate beneath the southern Pamir, which correlates with the counter-clockwise rotation of the Indian plate. The Asian plate is also imaged as a southward subducting seismic zone beneath the southern Pamir. In the NW Himalayas, the northward subducting Indian plate appears as a gently dipping low velocity anomaly beneath the Karakoram Block. The stresses caused by the collision and subduction along the Shyok Suture and Indus Suture are translated to the south. The crustal scale seismicity and high velocity anomalies indicate an intense deformation in the crust, which is manifested by syntaxial bends and thrust faults to the south of the Main Mantle Thrust.
关键词	PN ANISOTROPIC TOMOGRAPHY VELOCITY STRUCTURE KUSH REGION TECTONIC EVOLUTION NORTHERN PAKISTAN TIEN-SHAN BREAK-OFF SUBDUCTION ZONE ARC
英文关键词	Western Syntaxis; NW Himalayas; Pamir-Hindukush; Karakoram; Double-difference tomography; India-Asia collision
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000439400200009
来源期刊	PHYSICS OF THE EARTH AND PLANETARY INTERIORS
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/259208
推荐引用方式 GB/T 7714	Bhatti, Zahid Imran,Zhao, Junmeng,Khan, Nangyal Ghani,et al. Structure of crust and upper mantle beneath NW Himalayas, Pamir and Hindukush by multi-scale double-difference seismic tomography[J]. 中国科学院青藏高原研究所,2018,281.
APA	Bhatti, Zahid Imran,Zhao, Junmeng,Khan, Nangyal Ghani,&Hussain, Shah Syed Tallataf.(2018).Structure of crust and upper mantle beneath NW Himalayas, Pamir and Hindukush by multi-scale double-difference seismic tomography.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,281.
MLA	Bhatti, Zahid Imran,et al."Structure of crust and upper mantle beneath NW Himalayas, Pamir and Hindukush by multi-scale double-difference seismic tomography".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 281(2018).