Crustal deformation along the Longmen-Shan fault zone and its implications for seismogenesis
文献类型：期刊论文
| 作者 | Wang, Z ; Huang, RQ ; Pei, SP |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2014 |
| 卷号 | 610页码:128-137 |
| 关键词 | Crustal deformation Longmen-Shan fault zone Seismogenesis Continental colliding Crustal channel flow |
| ISSN号 | 0040-1951 |
| 通讯作者 | mike-wang@sohu.com |
| 中文摘要 | The Longmen-Shan fault zone, at the eastern margin of the Tibetan Plateau, is one of the most extensively studied areas in the world, yet the deformation model and earthquake-generating mechanism remain subjects of vigorous debate. This paper presents a new three-dimensional (3-D) velocity model determined using a large volume of seismic data and two-dimensional (2-D) magnetotelluric (MT) profiles from previous studies, to investigate the mechanisms of crustal deformation and earthquake generation along the reverse-thrust and strike-slip fault zone. It has been observed that low-velocity, and low-resistivity anomalies related to the Sichuan foreland basin, is in sharp contrast to high-velocity and high-resistivity anomalies in the Songpan-Ganze block in the upper crust. The tomographic model presented here reveals two crustal bodies with low-velocity and high-conductivity anomalies underneath the Longmen-Shan fault zone, separated into three contrasting segments by the two crustal bodies. The two low-velocity and low-resistivity bodies have been interpreted as being associated with extrusion of either fluids or products of partial melting from the lower crust and/or the upper mantle. This suggests strong variations in the rheological strength of the rock along the fault zone. This finding implies that coupling between these presumably fluid-bearing bodies and earthquake generation could be extremely complex and that there is dramatic variation from the southwestern area to the northeastern segment along the fault belt It is suggested here that this complex and variable deformation system along the fault zone played a principal role in controlling seismic generation and rupturing during the 2008 Wenchuan earthquake (Ms 8.0) and that it will do so again during possible future earthquakes in the region. (C) 2014 Elsevier B.V. All rights reserved. |
| 学科主题 | Geochemistry & Geophysics |
| 收录类别 | SCI |
| 资助信息 | NSFC [41372229, 40974024, 40872148, 40839909]; Chengdu University of Technology; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection; [KYTD201002]; [2010JQ0033]; [201151220007] |
| 原文出处 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000331156400009 |
| 公开日期 | 2014-12-11 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/10656]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Z,Huang, RQ,Pei, SP. Crustal deformation along the Longmen-Shan fault zone and its implications for seismogenesis[J]. TECTONOPHYSICS,2014,610:128-137. |
| APA | Wang, Z,Huang, RQ,&Pei, SP.(2014).Crustal deformation along the Longmen-Shan fault zone and its implications for seismogenesis.TECTONOPHYSICS,610,128-137. |
| MLA | Wang, Z,et al."Crustal deformation along the Longmen-Shan fault zone and its implications for seismogenesis".TECTONOPHYSICS 610(2014):128-137. |
入库方式： OAI收割
来源：南海海洋研究所
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