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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, Heng; Zhao, Dapeng; Ju, Changhui; Li, Yunyue Elita; Li, Guohui; Ding, Min; Chen, Shuze; Zhao, Junmeng | |
通讯作者 | Zhang, H (通讯作者) |
发表日期 | 2020 |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
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. |
关键词 | LITHOSPHERE-ASTHENOSPHERE BOUNDARYSOUTH VICTORIA LANDSEISMIC ANISOTROPYSTRUCTURE BENEATHAZIMUTHAL ANISOTROPYSKSSURFACECONSTRAINTSVELOCITIES |
语种 | 英语 |
WOS研究方向 | Geology |
WOS类目 | Geosciences, Multidisciplinary |
WOS记录号 | WOS:000536639500057 |
来源期刊 | GEOPHYSICAL RESEARCH 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/259906 |
推荐引用方式 GB/T 7714 | Zhang, Heng,Zhao, Dapeng,Ju, Changhui,et al. Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography[J]. 中国科学院青藏高原研究所,2020,47(9). |
APA | Zhang, Heng.,Zhao, Dapeng.,Ju, Changhui.,Li, Yunyue Elita.,Li, Guohui.,...&Zhao, Junmeng.(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, Heng,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). |
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