| 紫坪铺水库区小地震震源机制研究 |
| |
| 引用本文： | 胡先明,张永久,谢蓉华,韩进,邵玉平.紫坪铺水库区小地震震源机制研究[J].地震地质,2009,31(4):676. |
| |
| 作者姓名： | 胡先明 张永久 谢蓉华 韩进 邵玉平 |
| |
| 作者单位： | 四川省地震局,成都,610041 |
| |
| 基金项目： | "十一五"国家科技支撑计划项目，国家科技支撑计划项目 |
| |
| 摘 要： | 用紫坪铺水库专用台网的地震记录测定紫坪铺水库区262次小震震源机制参数,结果表明:节面I的优势方向与断裂走向展布一致性很好;库区地震断层有逆断层、正断层、左旋和右旋走滑断层,走滑断层占45%;库区断层66%陡峻,35%几近直立;受水库蓄水的影响,2006年7月1日后以走滑断层活动方式明显增多,水库地震群时段走滑断层活动方式表现突出
|
| 关 键 词： | 紫坪铺水库 小地震 震源机制解 断层活动 |
RESEARCH ON FOCAL MECHANISM OF SMALL EARTHQUAKES IN ZIPINGPU RESERVOIR AREA |
| |
| HU Xian-ming,ZHANG Yong-jiu,XIE Rong-hua,HAN Jin,SHAO Yu-ping.RESEARCH ON FOCAL MECHANISM OF SMALL EARTHQUAKES IN ZIPINGPU RESERVOIR AREA[J].Seismology and Geology,2009,31(4):676. |
| |
| Authors: | HU Xian-ming ZHANG Yong-jiu XIE Rong-hua HAN Jin SHAO Yu-ping |
| |
| Abstract: | The focal mechanism parameters of 262 small earthquakes recorded by Zipingpu reservoir earthquake monitoring network are calculated. The results show that the dominant strike of nodal plane Ⅰ and rupture are in good consistency. There are reverse fault, normal fault,left-lateral and right-lateral strike-slip fault in the reservoir area and the percentage of strike-slip fault amounts to 45 %. Of all the faults,66% are steep and 35% are almost vertical. As a result of the impact of reservoir impoundment, the strike-slip type faulting has obviously increased since 1 July 2006 ,and this type of faulting became dominant during the period of the reservoir earthquake swarm. |
| |
| Keywords: | Zipingpu reservoir small earthquake focal mechanism solution fault activity |
| 本文献已被 万方数据 等数据库收录！ |
|
