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| 1837年甘肃岷县北6级地震考证与发震构造分析 | |
| 引用本文： | 郑文俊,雷中生,袁道阳,何文贵,葛伟鹏,刘兴旺.1837年甘肃岷县北6级地震考证与发震构造分析[J].地震,2007,27(1):120-130. |
| 作者姓名： | 郑文俊 雷中生 袁道阳 何文贵 葛伟鹏 刘兴旺 |
| 作者单位： | 1.中国地震局地震预测研究所兰州科技创新基地, 甘肃 兰州 730000; 2.中国地震局兰州地震研究所, 甘肃 兰州 730000; 3.中国地震局地质研究所, 北京 100029 |
| 基金项目： | 地震科学联合基金 , 中国地震局项目 , 中国地震局地震预测研究所兰州科技创新基地资助项目 |
| 摘 要： | 通过对1837年甘肃岷县北6级地震的历史资料考证、 发震构造的综合研究表明:在1837年地震中遭破坏最为严重的地区位于今岷县堡子乡武旗及临潭县陈旗一带(当时的洮州厅以东约15 km)。 由此确定1837年甘肃岷县地震极震区位于甘肃岷县-临潭-卓尼三县交界, 极震区烈度为Ⅷ度, 震中位于北纬34.7°, 东经103.9°, 误差在10 km以内。 该地区构造位于东昆仑断裂带和西秦岭北缘断裂带的应变传递和构造转换的中间过渡区, 其中临潭-宕昌断裂带活动特性差异明显, 只有部分地段表现出全新世活动特征, 地震极震区一带分布有不同程度的滑坡和基岩崩塌等。 综合分析认为, 临潭-宕昌断裂带的岷县-宕昌段的前缘分支断裂是甘肃岷县1837年6级地震的发震构造。 |
| 关 键 词： | 历史地震 史料考证 发震构造 甘肃岷县北 |
| 文章编号： | 1000-3274(2007)01-0120-11 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006-05-08 |
Structural research on the 1837 northern Minxian M6 earthquake in Gansu Province and its causative structure |
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| ZHENG Wen-jun,LEI Zhong-sheng,YUAN Dao-yang,HE Wen-gui,GE Wei-peng,LIU Xing-wang.Structural research on the 1837 northern Minxian M6 earthquake in Gansu Province and its causative structure[J].Earthquake,2007,27(1):120-130. | |
| Authors: | ZHENG Wen-jun LEI Zhong-sheng YUAN Dao-yang HE Wen-gui GE Wei-peng LIU Xing-wang |
| Institution: | 1. Lanzhou Base of Institute of Earthquake Science, CEA, Lanzhou 730000; 2. Lanzhou Institute of Seismology, CEA, Lanzhou 730000; 3. State key Laboratory of Earthquake Dynamics, Institute of Geology, CEA, Beijing 100029, China |
| Abstract: | According to the detailed textual research of the historical earthquake records and its causative structure on the northern Minxian M6 earthquake, we have found that the most serious disaster area located in Wuqi village, Minxian County and Chenqi village, Lintan County (about 15 km, eastern to Taozhou County at that time). So, we can conclude that the extremely seismic area of the 1837 A.D. northern Minxian M6 earthquake occurred on the common boundary of the Minxian, Lintan and Zhuoni Counties, in Gansu Province, the intensity is Ⅷ, the epicenter is 34.7°N, 103.9°E, the error of the location is less than 10 km. Tectonically, this area is situated in the transitional region of stress transfer and structural transform between the east Kunlun fault and the northern margin fault of west Qinling range. In middle, the activity of the Lintan-Tanchang fault zone has obvious difference, only the partial segment shows the activity of Holocene. There are landslides and collapses with different scale in the extremely seismic area. Through comprehensive, we consider that the fore-fault of Minxian-Tanchang segment of the Lintan-Tanchang fault is causative structure of the 1837 A.D. northern Minxian M6 earthquake, in Gansu Province. |
| Keywords: | Historical earthquake Textual research Causative structure Northern Minxian |
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