气候变化领域集成服务门户(CCPortal): Upper mantle deformation beneath central-southern Tibet revealed by shear wave splitting measurements

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DOI	10.1016/j.tecto.2013.11.003
	Upper mantle deformation beneath central-southern Tibet revealed by shear wave splitting measurements
	Zhao, Junmeng; Murodov, Davlatkhudzha; Huang, Ying; Sun, Youshun; Pei, Shunping; Liu, Hongbing; Zhang, Heng; Fu, Yuanyuan; Wang, Wei; Cheng, Honggang; Tang, Wei
通讯作者	Zhao, JM (通讯作者)
发表日期	2014
ISSN	0040-1951
EISSN	1879-3266
起始页码	135
结束页码	140
卷号	627
英文摘要	Seismic anisotropy in the upper mantle has been inferred from shear wave splitting measurements at the temporary seismic array (ANTILOPE-2) in the central-southern Tibet from September 2005 to October 2006. Teleseismic shear waves (mainly SKS and SKKS) are used to determine the splitting parameters (fast polarization direction and delay time). Weak splitting with average delay time of 0.3 s is observed at stations in the southern Lhasa terrane and northernmost Tethyan Himalaya. Significant seismic polarization anisotropy with delay times from 0.8 to 1.5 s and NE-oriented fast direction is obtained for stations located farther north in the northern Lhasa terrane. The transition in shear wave splitting characteristics occurs at 30.5 degrees N and suggests distinct upper mantle deformation from south to north. The negligible anisotropy south of this transition indicates that there is no appreciable large-scale mantle seismic polarization anisotropy. The substantial anisotropy in the north may be caused by the eastward flow in a lithospheric crush zone which is squeezed and sheared between the advancing Indian plate to the south and Eurasian plate to the north. (C) 2013 Elsevier B.V. All rights reserved.
关键词	ANISOTROPY BENEATH SEISMIC ANISOTROPY COLLISION ZONE EASTERN TIBET PLATEAU CRUST TOMOGRAPHY SUBDUCTION HIMALAYAS LHASA
英文关键词	Anisotropy; Shear wave splitting; Mantle overlapping zone; Central-southern Tibet
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000339535000013
来源期刊	TECTONOPHYSICS
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/258310
推荐引用方式 GB/T 7714	Zhao, Junmeng,Murodov, Davlatkhudzha,Huang, Ying,et al. Upper mantle deformation beneath central-southern Tibet revealed by shear wave splitting measurements[J]. 中国科学院青藏高原研究所,2014,627.
APA	Zhao, Junmeng.,Murodov, Davlatkhudzha.,Huang, Ying.,Sun, Youshun.,Pei, Shunping.,...&Tang, Wei.(2014).Upper mantle deformation beneath central-southern Tibet revealed by shear wave splitting measurements.TECTONOPHYSICS,627.
MLA	Zhao, Junmeng,et al."Upper mantle deformation beneath central-southern Tibet revealed by shear wave splitting measurements".TECTONOPHYSICS 627(2014).