摘要
本文在分析2012年6月24日宁蒗—盐源5.7级地震的震源机制解、余震特征、震害分布基础上,结合区域第四纪地层分布成因特征、区域地质构造特征以及对三维卫星遥感影像进行断层地貌解译分析,认为此次5.7级地震是北西向永宁断裂正断为主活动的结果。该断裂在影像上线性延伸,断层崖发育,其晚第四纪活动性对建立区域新构造变形模式的意义有待进一步研究。
In this paper,we analyse focal mechanism solution of the June 24,2012 Ninglang-Yanyuan MS5.7 earthquake,distribution feature of aftershocks and disaster distribution of the main earthquake.Then,combining with regional distribution characteristics of the quaternary strata,regional geological structural characteristics and three-dimensional satellite remote sensing image,we proposed that the June 24,2012 Ninglang-Yanyuan MS5.7 earthquake is the result of new activity of the North-West extension Yong-ning fault.The Yong-ning fault is of linear extension in image,fault scarp development,the late Quaternary activity and the significance in regional tectonic deformation of the Yong-ning fault needs more study.
出处
《地震》
CSCD
北大核心
2012年第4期140-147,共8页
Earthquake
基金
中国地震活断层探查--南北带中南段(60112303
60112304)
中国地震局地震预测研究所基本科研业务经费(0210240201
02122407)联合资助
关键词
宁蒗—盐源5.7级地震
地震构造
永宁断裂
震源机制解
余震分布
震害分布
The June 24
2012 Ninglang-Yanyuan MS5.7 earthquake
Seismogenic structure
Yong-ning fault
Focal mechanism solution
Disaster distribution
Aftershocks
