| 四川汶川Ms 8.0地震地表破裂构造初步调查与发震背景分析 |
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| 引用本文：董树文,张岳桥,龙长兴,吴珍汉,安美建,张永双,杨农,陈正乐,雷伟志,施炜,石菊松.2008.四川汶川Ms 8.0地震地表破裂构造初步调查与发震背景分析[J].地球学报,29(3):392-396. |
| DOI：10.3975/cagsb.2008.03.13 |
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| 基金项目:中国地质科学院地质力学研究所基本科研项目(编号:DZLXJK200807) |
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| 中文摘要:5月16-24日对川西汶川大地震震中区的发震断裂地带进行的实地考察和初步测量,获得了宝贵的地表变形和同震位移最数据资料,证实汶川地震属于逆冲断裂型地震,主破裂沿映秀-北川断裂带发育,前山地区滑灌县-安县断裂也有地表破裂,同震位移量在3～5m.汶川地震产牛的地表破裂构造和运动性质显示明显分段特性,映秀-北川段以挤压逆冲为主,而北川以北段则伴有显著的右旋走滑分量. |
| 中文关键词:汶川地震 逆冲断裂 地表破裂 发震背景 |
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| Surface Rupture Investigation of the Wenchuan Ms 8.0 Earthquake of May 12th, 2008, West Sichuan, and Analysis of Its Occurrence Setting |
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| Abstract:Field investigation and measurements of the surface ruptures were conducted immediately after the occurrence of the Wenchuan Ms 8.0 Earthquake of May 12th,2008.The data of surface deformation and co-seismic displacements obtained during this excursion confirm that the Wenchuan earthquake belongs to the reverse faulting type,the surface ruptures occurred mostly along the Yingxiu-Beichuan fault zone and partly along the Guanxian-Anxian fault zone.The surface rupture zone produced by the Wenchuan earthquake exhibits characteristic segmentation behavior,its southern segment between the Yingxiu Township and Beichuan county is reverse faulting dominated,while the segment north of Beichuan county shows important dextral strike-slip component. |
| keywords:Wenchuan earthquake reverse faulting surface rupture earthquake occurrence setting |
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