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| 汶川8.0级地震地表破裂带 | |
| 引用本文： | 马保起,张世民,田勤俭,谢富仁.汶川8.0级地震地表破裂带[J].第四纪研究,2008,28(4):513-517. |
| 作者姓名： | 马保起 张世民 田勤俭 谢富仁 |
| 作者单位： | 1. 中国地震局地壳应力研究所,北京,100085 2. 中国地震灾害防御中心,北京,100029 |
| 基金项目： | 中国地震局地壳应力研究所基本科研业务专项项目 |
| 摘 要： | 汶川8.0级地震的发震构造为龙门山断裂带。地震地表破裂分布在北川-映秀断裂和江油-灌县断裂上,长度分别为200km和70km。地震地表破裂表现为地表出露的地震破裂面、雁列分布的地震裂缝、地震断坎和断塞塘等。地表破裂的性质主要为右旋逆冲,最大同震位错的逆冲量和走滑量均为5.0m左右,分别位于擂鼓和虹口附近。地表破裂带的最大挤压缩短量为3.5m左右,最大宽度约为70～100m。 |
| 关 键 词： | 汶川8.0级地震 龙门山断裂带 地表破裂带 同震位错 挤压缩短量 |
| 收稿时间： | 2008-07-17 |
| 修稿时间： | 2008-07-19 |
THE SURFACE RUPTURE OF WENCHUAN EARTHQUAKE(M8.0) |
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| Ma Baoqi,Zhang Shimin,Tian Qinjian,Xie Furen.THE SURFACE RUPTURE OF WENCHUAN EARTHQUAKE(M8.0)[J].Quaternary Sciences,2008,28(4):513-517. | |
| Authors: | Ma Baoqi Zhang Shimin Tian Qinjian Xie Furen |
| Institution: | 1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085; 2. China Earthquake Disaster Prevention Center, Beijing 100029 |
| Abstract: | The seismogenic structure of Wenchuan Earthquake(M8.0) is the Longmenshan fault zone.Its surface rupture occurs on the Beichuan-Yingxiu and the Jiangyou-Guanxian faults,with the lengths of 200km and 70km,respectively.The surface rupture includes seismic fault plane,en echelon fissures,co-seismic scarps et al.The surface rupture is characterized with reversed faulting with strike-slip movement.Its maximum reversed and strike-slip displacements are on the order of 5.0m each,occurring on Leigu town and Hongkou town,respectively.Its maximum compressed shortening is about 3.5m,and the maximum width is 70～100m. |
| Keywords: | Wenchuan 8 0 Earthquake the Longmenshan fault zone surface rupture co-seismic displacement compressed shortening |
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