永胜6.0级地震的地质构造背景及发震构造  

The Seismological Tectonic Background and Seismogenic Structure of the M6.0 Yongsheng Earthquake

作　　者：周光全[1] 王晋南[1] 王绍晋[1] 苏有锦[1] 

机构地区：[1]云南省地震局,昆明650041

出　　处：《地震研究》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 )

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.

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 

分 类 号：P315.2[天文地球—地震学]