气候变化领域集成服务门户(CCPortal): Layered crustal azimuthal anisotropy beneath the northeastern Tibetan Plateau revealed by Rayleigh-wave Eikonal tomography

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DOI	10.1016/j.epsl.2021.116891
	Layered crustal azimuthal anisotropy beneath the northeastern Tibetan Plateau revealed by Rayleigh-wave Eikonal tomography
	Hao S.; Huang Z.; Han C.; Wang L.; Xu M.; Mi N.; Yu D.
发表日期	2021
ISSN	0012821X
卷号	563
英文摘要	The uplift of the Tibetan Plateau in the Cenozoic has greatly affected the tectonics in Asia. But the evolution of the plateau is still unclear. The northeastern Tibetan Plateau is under ongoing expansion and is therefore essential for understanding the tectonic evolution of the plateau. Using data from 675 stations deployed by the ChinArray project, we obtained an anisotropic shear-wave velocity model by Rayleigh-wave phase-velocity Eikonal tomography and further investigated layered anisotropy and deformation patterns in the northeastern Tibetan Plateau. In the upper crust (<20 km depth), the fast directions are parallel with major strike-slip faults. In the lower crust, the fast directions are mostly margin-parallel along the plateau margin (at depths of ∼20 km to Moho), but they are perpendicular to the plateau margin while parallel to the topographic gradient under the high plateau (at depths of ∼40 km to Moho). Our result indicates that there is lower crustal flow under the high plateau due to the differential lateral gravity potential. However, the deep crustal flow is blocked by the surrounding blocks, which results in pure shear along the plateau margin in the northeastern Tibetan Plateau. © 2021 Elsevier B.V.
关键词	azimuthal anisotropy crustal flow Eikonal tomography plateau expansion pure shear Tibetan Plateau
英文关键词	Anisotropy; Rayleigh waves; Shear flow; Shear waves; Strike-slip faults; Tomography; Wave propagation; Azimuthal anisotropy; Crustal flow; Crustals; Eikonal; Eikonal tomography; Northeastern tibetan plateaux; Plateau expansion; Pure shear; Rayleigh; Tibetan Plateau; Expansion; crustal deformation; phase velocity; plateau; Rayleigh wave; S-wave; seismic anisotropy; seismic tomography; tectonic evolution; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203118
作者单位	State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Hao S.,Huang Z.,Han C.,et al. Layered crustal azimuthal anisotropy beneath the northeastern Tibetan Plateau revealed by Rayleigh-wave Eikonal tomography[J],2021,563.
APA	Hao S..,Huang Z..,Han C..,Wang L..,Xu M..,...&Yu D..(2021).Layered crustal azimuthal anisotropy beneath the northeastern Tibetan Plateau revealed by Rayleigh-wave Eikonal tomography.Earth and Planetary Science Letters,563.
MLA	Hao S.,et al."Layered crustal azimuthal anisotropy beneath the northeastern Tibetan Plateau revealed by Rayleigh-wave Eikonal tomography".Earth and Planetary Science Letters 563(2021).