| Surface Rupture and Co-seismic Displacement Produced by the Ms 8.0 Wenchuan Earthquake of May 12th, 2008, Sichuan, China: Eastwards Growth of the Qinghai-Tibet Plateau |
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| 作者姓名： | DONG Shuwen ZHANG Yueqiao WU Zhenhan YANG Nong MA Yinsheng SHI Wei CHEN Zhengle LONG Changxing AN Meijian |
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| 作者单位： | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100082, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100083, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100084, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100085, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100086, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100087, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100088, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100089, China |
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| 基金项目： | This study was funded by the project of China Geological Survey (No.1212010670104). |
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| 摘 要： | An earthquake of Ms 8 struck Wenchuan County, western Sichuan, China, on May 12^th, 2008 and resulted in long surface ruptures （〉300 km）. The first-hand observations about the surface ruptures produced by the earthquake in the worst-hit areas of Yingxiu, Beichuan and Qingchuan, ascertained that the causative structure of the earthquake was in the central fault zones of the Longmenshan tectonic belt. Average co-seismic vertical displacements along the individual fault of the Yingxiu-Beiehuan rupture zone reach 2.514 m and the cumulative vertical displacements across the central and frontal Longmenshan fault belt is about 5-6 m. The surface rupture strength was reduced from north of Beichuan to Qingchuan County and shows 2-3 m dextral strike-slip component. The Wenchuan thrust-faulting earthquake is a manifestation of eastward growth of the Tibetan Plateau under the action of continuous convergence of the Indian and Eurasian continents.
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| 关 键 词： | 表面破裂 汶川地震 青海-西藏高原 位移 |
| 收稿时间： | 2008/5/31 0:00:00 |
| 修稿时间： | 2008/6/30 0:00:00 |
Surface Rupture and Co-seismic Displacement Produced by the Ms 8.0 Wenchuan Earthquake of May 12th, 2008, Sichuan,China： Eastwards Growth of the Qinghai-Tibet Plateau |
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| Authors: | DONG Shuwen ZHANG Yueqiao WU Zhenhan YANG Non MA Yinsheng SHI Wei CHEN Zhengle LONG Changxin AN Meijian |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | An earthquake of Ms 8 struck Wenchuan County, western Sichuan, China, on May 12th, 2008 and resulted in long surface ruptures (>300 km). The first‐hand observations about the surface ruptures produced by the earthquake in the worst‐hit areas of Yingxiu, Beichuan and Qingchuan, ascertained that the causative structure of the earthquake was in the central fault zones of the Longmenshan tectonic belt. Average co‐seismic vertical displacements along the individual fault of the Yingxiu‐Beichuan rupture zone reach 2.5‐4 m and the cumulative vertical displacements across the central and frontal Longmenshan fault belt is about 5–6 m. The surface rupture strength was reduced from north of Beichuan to Qingchuan County and shows 2–3 m dextral strike‐slip component. The Wenchuan thrust‐faulting earthquake is a manifestation of eastward growth of the Tibetan Plateau under the action of continuous convergence of the Indian and Eurasian continents. |
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| Keywords: | Ms 8 0 Wenchuan earthquake surface ruptures co-seismic displacement eastern Tibet |
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