Uppermost mantle structure of the eastern margin of the Tibetan plateau from interstation Pn traveltime difference tomography
文献类型：期刊论文
| 作者 | Li, Zhiwei1; Ni, Sidao1; Hao, Tianyao2; Xu, Yi2; Roecker, Steven3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2012-06-15 |
| 卷号 | 335页码:195-205 |
| 关键词 | eastern Tibetan plateau Wenchuan earthquake traveltime tomography uppermost mantle Pn traveltime difference Longmenshan Fault Belt |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2012.05.005 |
| 文献子类 | Article |
| 英文摘要 | Tomographic inversion with interstation Pn differential traveltime data provides a reliable velocity image of the uppermost mantle across the Longmenshan Fault Belt, which borders the eastern Tibetan plateau and Sichuan Basin. Low Pn velocities (<7.8 km/s) are revealed beneath the eastern Tibetan plateau to the west of the Longmenshan Fault Belt, while high Pn velocities (> 8.1 km/s) appear beneath the Sichuan Basin to the east, suggesting a relatively weak upper mantle beneath eastern Tibetan plateau and a strong upper mantle beneath the Sichuan Basin. The Pn velocities are consistent with the proposition that the rigid and stable lithosphere of the Sichuan Basin may act as a barrier to the eastward escape flow of the ductile crust of the eastern Tibetan plateau. Consistency of Pn velocities with the smoothed topography, crustal thickness and Bouguer gravity implies that the dynamic processes of the lithospheric mantle should be responsible for the crustal thickening and relief of uplift in the eastern Tibetan plateau. However, the Longmeshan Fault Belt appears to be separated into two segments by the Huya and Leidong faults as manifested by significant discrepancies in topography gradient, seismic activity, rupture process and aftershock distribution of Wenchuan earthquake. This segmentation is also supported by difference in Pn velocities along the strike of the fault belt, suggesting different tectonic environments in the crust and lithospheric mantle. Understanding of the mechanism for the segmentation requires further investigation. (C) 2012 Elsevier B.V. All rights reserved. |
| WOS关键词 | LOWER CRUSTAL FLOW ; WAVE VELOCITY STRUCTURE ; AMBIENT SEISMIC NOISE ; WENCHUAN EARTHQUAKE ; WESTERN SICHUAN ; TECTONIC IMPLICATIONS ; ACTIVE DEFORMATION ; STRUCTURE BENEATH ; ARRAY TOMOGRAPHY ; HAYWARD FAULT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000306981600019 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | NSFC(41074032) ; NSFC(41074032) ; CAS ; CAS ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; NSFC(41074032) ; NSFC(41074032) ; CAS ; CAS ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; NSFC(41074032) ; NSFC(41074032) ; CAS ; CAS ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics ; NSFC(41074032) ; NSFC(41074032) ; CAS ; CAS ; State Key Laboratory of Geodesy and Earth's Dynamics ; State Key Laboratory of Geodesy and Earth's Dynamics |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84136]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ni, Sidao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 3.Rensselaer Polytech Inst, Dept Earth & Environm Sci, Troy, NY 12180 USA |
| 推荐引用方式 GB/T 7714 | Li, Zhiwei,Ni, Sidao,Hao, Tianyao,et al. Uppermost mantle structure of the eastern margin of the Tibetan plateau from interstation Pn traveltime difference tomography[J]. EARTH AND PLANETARY SCIENCE LETTERS,2012,335:195-205. |
| APA | Li, Zhiwei,Ni, Sidao,Hao, Tianyao,Xu, Yi,&Roecker, Steven.(2012).Uppermost mantle structure of the eastern margin of the Tibetan plateau from interstation Pn traveltime difference tomography.EARTH AND PLANETARY SCIENCE LETTERS,335,195-205. |
| MLA | Li, Zhiwei,et al."Uppermost mantle structure of the eastern margin of the Tibetan plateau from interstation Pn traveltime difference tomography".EARTH AND PLANETARY SCIENCE LETTERS 335(2012):195-205. |
入库方式： OAI收割
来源：地质与地球物理研究所
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