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DOI	10.1016/j.tecto.2023.229863
	Measurements of Rayleigh wave ellipticity anisotropy and implications for distinct crustal deformation styles across the SE Tibet margin
	Ai, Sanxi; Zheng, Yong; Zeng, Sijia; Wang, Sixue
发表日期	2023
ISSN	0040-1951
EISSN	1879-3266
卷号	856
英文摘要	Plateau growth of southeastern Tibet is often understood by applying the end-member conceptual models, such as ductile material flow in the deep crust, and lateral extrusion of coherently deforming or rigid blocks. Though recent studies suggest the local crustal flow and movements of rigid blocks may be compatible in a way, am-biguities still persist in the formation of the gently sloping margin of southeastern Tibet and interactions between the plateau and the outer forelands. Here we present a 3D crustal deformation model in southeastern Tibet and adjacent regions, by summarizing different types of seismic anisotropy measurements including a newly obtained continuous map of uppermost crustal anisotropy, which are derived from observations of the directionally dependent teleseismic Rayleigh wave ellipticity. Layered deformation is observed within the crust beneath the southeastern Tibet Plateau, while the outer foreland shows an overall coherently deforming mode. The con-spicuous change of the crustal deformation styles across the southeastern Tibet margin is against the idea that the low topographic gradients of the plateau margin were produced by leakage of ductile deep crust beneath the plateau. We argue that both the crustal flow beneath the plateau interior and lateral extrusion of the outer foreland accommodate the intracontinental convergence at southeastern Tibet.
关键词	SE Tibet Crust deformation Rayleigh wave ellipticity
英文关键词	AZIMUTHAL ANISOTROPY; SEISMIC ANISOTROPY; EASTERN MARGIN; PLATEAU; BENEATH; FLOW; LITHOSPHERE; DISPERSION; CHINA; ASIA
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000986859400001
来源期刊	TECTONOPHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282590
作者单位	China University of Geosciences - Wuhan; China University of Geosciences - Wuhan
推荐引用方式 GB/T 7714	Ai, Sanxi,Zheng, Yong,Zeng, Sijia,et al. Measurements of Rayleigh wave ellipticity anisotropy and implications for distinct crustal deformation styles across the SE Tibet margin[J],2023,856.
APA	Ai, Sanxi,Zheng, Yong,Zeng, Sijia,&Wang, Sixue.(2023).Measurements of Rayleigh wave ellipticity anisotropy and implications for distinct crustal deformation styles across the SE Tibet margin.TECTONOPHYSICS,856.
MLA	Ai, Sanxi,et al."Measurements of Rayleigh wave ellipticity anisotropy and implications for distinct crustal deformation styles across the SE Tibet margin".TECTONOPHYSICS 856(2023).