摘要
阐述了永胜MS6 0级地震震区的地震地质构造背景与构造应力场 ,结合本次地震的烈度分布几何形态、震源机制解、主余震震中分布和地表破坏等资料 ,讨论了地震的发震构造 ,认为程海断裂宾川—金沙江段是该地震的发震断裂。程海断裂宾川—金沙江段以左旋走滑活动为主 。
The regional seismological tectonic background and the features of tectonic stress field of the Yongsheng Earthquake are stated in detail in this paper.On the basis of the seismogeological field survey made by the authors,the seismic intensity distribution,the focal mechanism solution,the main shock and aftershock epicentral distribution and the surface damages caused by the earthquake are comprehensively analyzed together with its seismogenic structure.It is concluded,therefore,that the Binchuan-Jinshajiang segment of Chenghai fault is the seismogenic fault of the earthquake and the fault's activity in the earthquake took left-lateral strike-slip as dominant,accompanyied by normal dip-slip faulting.
出处
《地震研究》
CSCD
北大核心
2002年第4期356-361,共6页
Journal of Seismological Research
基金
"十五"国家科技攻关项目 ( 2 0 0 1BA6 0 1B0 1-0 2 -0 2 )
关键词
地质构造背景
发震构造
发震断裂
程海断理解
左旋走滑
永胜6级地震
seismological tectonic background
seismogenic fault
chenghai fault
left-lateral strike-slip
M6.0 Yongsheng earthquake.
