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| DOI | 10.1016/j.epsl.2008.12.038 |
| Structural control of rupturing of the Mw7.9 2008 Wenchuan Earthquake, China | |
| Wang, Zhi; Fukao, Yoshio; Pei, Shunping | |
| 通讯作者 | Wang, Z (通讯作者) |
| 发表日期 | 2009 |
| ISSN | 0012-821X |
| EISSN | 1385-013X |
| 起始页码 | 131 |
| 结束页码 | 138 |
| 卷号 | 279期号:1-2 |
| 英文摘要 | Analyses of global seismic waveform data for the 2008 devastating Wenchuan Earthquake have indicated where the rupture started and how it expanded. Here we reveal that the rupture process of this earthquake was strongly controlled by structural heterogeneities of the upper crust. We made a tomographic inversion of 200,000 local travel time data, according to which the rupture was confined in a presumably brittle layer of high P- and S-wave velocity anomalies within the upper similar to 15 km depths. The rupture propagated northeastward through the southwest (SW) segment of the fault and then jumped to the northeast (NE) segment with little slip at the intervening, presumably ductile zone characterized by low P and S velocities with high Poisson's ratio. The rupture initiated near the southwestern end of the SW segment within a body of high Poisson's ratio, which extends down into the lower crust, suggesting upward migration of deep-seated aqueous fluid to trigger the earthquake by reducing the mechanical strength of the brittle layer. (C) 2009 Elsevier B.V. All rights reserved. |
| 关键词 | LOWER CRUSTAL FLOWUPPER-MANTLEPREFECTURE EARTHQUAKEVELOCITY STRUCTURESOURCE AREATIBETFLUIDSTOMOGRAPHYPLATEAUQINGHAI |
| 英文关键词 | 2008 Wenchuan earthquake; structural heterogeneity; source rupture; fluids penetration; crustal ductile flow |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:000264473700013 |
| 来源期刊 | EARTH AND PLANETARY SCIENCE 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/257692 |
| 推荐引用方式 GB/T 7714 | Wang, Zhi,Fukao, Yoshio,Pei, Shunping. Structural control of rupturing of the Mw7.9 2008 Wenchuan Earthquake, China[J]. 中国科学院青藏高原研究所,2009,279(1-2). |
| APA | Wang, Zhi,Fukao, Yoshio,&Pei, Shunping.(2009).Structural control of rupturing of the Mw7.9 2008 Wenchuan Earthquake, China.EARTH AND PLANETARY SCIENCE LETTERS,279(1-2). |
| MLA | Wang, Zhi,et al."Structural control of rupturing of the Mw7.9 2008 Wenchuan Earthquake, China".EARTH AND PLANETARY SCIENCE LETTERS 279.1-2(2009). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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