气候变化领域集成服务门户(CCPortal): Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography

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DOI	10.1029/2019GL086511
	Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography
	Zhang H.; Zhao D.; Ju C.; Li Y.E.; Li G.; Ding M.; Chen S.; Zhao J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	A large number of teleseismic traveltime data are used to determine the first P-wave radial anisotropy tomography beneath the Terror Rift, the northern Transantarctic Mountains (NTAM) and the Wilkes Subglacial Basin in Antarctica. Our results show that variations of radial anisotropy occur in both horizontal and vertical directions. In the NTAM, a high-velocity zone with positive radial anisotropy is revealed at shallower depths, which reflects the lithospheric deformation pattern formed during the Ross Orogeny. In contrast, negative radial anisotropy appears at depths >200 km under the NTAM, which is caused by the characterization of olivine fabric rather than foundering lithosphere. Beneath the western Wilkes Subglacial Basin, a two-layer lithosphere exists that contains rift-induced cracks. To the east of the NTAM, asthenospheric upwelling occurs at shallow depths beneath the Terror Rift. Then the upwelling asthenosphere flows northward to Mount Melbourne and southward to Mount Erebus. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Anisotropy; Deformation; Silicate minerals; Tomography; High velocity; Induced crack; Lithospheric deformation; Olivine fabric; Radial anisotropy; Shallow depths; Upper mantle; Vertical direction; Seismic waves; asthenosphere; crack; crustal deformation; mantle; olivine; P-wave; rift zone; seismic anisotropy; seismic tomography; teleseismic wave; travel time; upwelling; wave velocity; Antarctica; East Antarctica; Mount Erebus; Mount Melbourne; Ross Island; Transantarctic Mountains; Wilkes Subglacial Basin
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170405
作者单位	Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, and Center for Excellence in Tibetan Plateau Earth Science, Chinese Academy of Sciences, Beijing, China; Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan; Department of Civil and Environmental Engineering, National University of Singapore, Singapore; State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau
推荐引用方式 GB/T 7714	Zhang H.,Zhao D.,Ju C.,et al. Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography[J],2020,47(9).
APA	Zhang H..,Zhao D..,Ju C..,Li Y.E..,Li G..,...&Zhao J..(2020).Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography.Geophysical Research Letters,47(9).
MLA	Zhang H.,et al."Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography".Geophysical Research Letters 47.9(2020).