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| 汶川8.0级地震及余震破裂的地质构造特征 | |
| 引用本文： | 田勤俭,刁桂苓,郝平,冯向东,孙晴.汶川8.0级地震及余震破裂的地质构造特征[J].地震,2009,29(1). |
| 作者姓名： | 田勤俭 刁桂苓 郝平 冯向东 孙晴 |
| 作者单位： | 1. 中国地震灾害防御中心,北京,100029;中国地震局地震预测研究所,北京,100036 2. 河北省地震局,河北,石家庄,050021 3. 中国地震局地震预测研究所,北京,100036 |
| 基金项目： | 地震行业科研专项经费项目，国家重点基础研究发展规划(973计划)，中国地震局地震预测研究所基本科研业务专项经费资助项目，国家科技支撑项目 |
| 摘 要： | 汶川8.0级地震是发生在龙门山断裂带上的大地震,文中应用地震地表破裂调查资料、余震分布和震源机制资料,论述了该次地震的主破裂、次级破裂、触发破裂等方面的地质特征.认为该次地震的主破裂长约200 km,分为南、北两段.南段以逆冲破裂为主,由两条破裂带构成,并引起上盘多条近平行的次级断裂带的破裂;北段以右旋逆冲破裂为主,由单条破裂带构成;在主破裂的东北方向,触发了长约100 km的余震活动.汶川8.0级地震的破裂特征,对研究龙门山断裂带其他段落的强震危险性具有重要意义. |
| 关 键 词： | 汶川8.0级地震 龙门山断裂 地震地表破裂 震源机制 余震分布 |
Earthquake Geology of the Wenchuan M8.0 Mainshock and its Aftershocks |
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| TIAN Qin-jian,DIAO Gui-ling,HAO Ping,FENG Xiang-dong,SUN Qing.Earthquake Geology of the Wenchuan M8.0 Mainshock and its Aftershocks[J].Earthquake,2009,29(1). | |
| Authors: | TIAN Qin-jian DIAO Gui-ling HAO Ping FENG Xiang-dong SUN Qing |
| Institution: | 1.China Earthquake Disaster Prevention Center;Beijing 100029;China;2.Institute of Earthquake Science;CEA;Beijing 100036;3.Earthquake Administration of Hebei Province;Shijiazhuang 050021;China |
| Abstract: | The Wenchuan M8 earthquake occurred on the Longmenshan fault zone.Based on field investigation of the surface rupture and focal mechanism study of the aftershocks,we studied the geological relationship of main rupture,secondary rupture and trigged rupture.The main rupture is about 200 km long which can be divided into the south part and north part.The south part consists of two parallel fault zones mainly reverse,with several parallel secondary ruptures on the hanging wall of the main fault,and the north pa... |
| Keywords: | Wenchuan M8 0 earthquake Longmenshan fault Surface rupture Focal mechanism Aftershocks |
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