气候变化领域集成服务门户(CCPortal): Crustal flow pattern beneath the Tibetan Plateau constrained by regional Lg-wave Q tomography

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DOI	10.1016/j.epsl.2013.09.038
	Crustal flow pattern beneath the Tibetan Plateau constrained by regional Lg-wave Q tomography
	Zhao, Lian-Feng; Xie, Xiao-Bi; He, Jian-Kun; Tian, Xiaobo; Yao, Zhen-Xing
通讯作者	Zhao, LF (通讯作者)
发表日期	2013
ISSN	0012-821X
EISSN	1385-013X
起始页码	113
结束页码	122
卷号	383
英文摘要	As a prominent geophysical anomaly, unusually high seismic wave attenuation is observed in the crust and upper mantle of the Tibetan Plateau, particularly along its northern area. Theoretical and laboratory investigations show that the strong seismic attenuation can indicate high temperatures and partial melting, which may decrease the viscosity of the material and cause it to flow. Thus, seismic attenuation distribution may provide useful constraints to the crust flows if they exist. Using Lg-wave Q tomography, we construct a 0.05-10.0 Hz broadband high-resolution crust attenuation model for the Tibetan Plateau and its surrounding regions. The maximum spatial resolution is approximately 1.0 degrees x 1.0 degrees in well-covered areas and for frequencies between 0.05 and 1.5 Hz. This attenuation model reveals an apparent low-Q(Lg) belt stretching along the northern and eastern Tibetan plateau. Combining the Lg-wave Q model with other geophysical data, two possible crust flow channels are found in the Tibetan Plateau. The main flow channel is from north to east and then turns to southeastern Tibet along the western edge of the rigid Sichuan basin, while a second channel starts from southern Tibet and crosses the Eastern Himalayan syntaxis. (C) 2013 Published by Elsevier B.V.
关键词	SOUTHERN TIBET MANTLE BENEATH LITHOSPHERIC STRUCTURE MAGNETOTELLURIC DATA NORTHEASTERN MARGIN SEISMIC ATTENUATION BRIGHT SPOTS MIDDLE CRUST PARTIAL MELT ANISOTROPY
英文关键词	Lg attenuation; Q tomography; lower-crustal flow; Tibetan Plateau; crustal deformation
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000328593500012
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
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/258168
推荐引用方式 GB/T 7714	Zhao, Lian-Feng,Xie, Xiao-Bi,He, Jian-Kun,et al. Crustal flow pattern beneath the Tibetan Plateau constrained by regional Lg-wave Q tomography[J]. 中国科学院青藏高原研究所,2013,383.
APA	Zhao, Lian-Feng,Xie, Xiao-Bi,He, Jian-Kun,Tian, Xiaobo,&Yao, Zhen-Xing.(2013).Crustal flow pattern beneath the Tibetan Plateau constrained by regional Lg-wave Q tomography.EARTH AND PLANETARY SCIENCE LETTERS,383.
MLA	Zhao, Lian-Feng,et al."Crustal flow pattern beneath the Tibetan Plateau constrained by regional Lg-wave Q tomography".EARTH AND PLANETARY SCIENCE LETTERS 383(2013).