红河断裂带的震源机制与现代构造应力场  

Focal Mechanism of Strong and Medium-small Earthquakes and Modern Tectonic Stress-Field of the Red-River Fault Zone

作　　者：王绍晋[1] 张建国[1] 余庆坤[1] 龙晓帆[1] 

机构地区：[1]云南省地震局,昆明650224

出　　处：《地震研究》2010年第2期200-207,共8页Journal of Seismological Research

基　　金：宁洱6.4级地震现场综合考察和研究公益性行业科研专项经费资助

摘　　要：利用震源机制解对红河断裂带的现代构造应力场和震源破裂进行分析,结果表明沿断裂带震源机制、应力场和震源破裂存在着主体类型、优势作用和主要特征,同时也存在着复杂性特征,断裂带北、中、南段存在差异,反映了断裂带各段构造活动的差异。Using the mechanism solutions of the strong and medium-small earthquakes in the Red-River Fault Zone and its vicinity,we analyze the distribution of the modern tectonic stress-field of the Fault Zone and discuss the Characteristics of the focal rupture of the earthquakes alongside the Fault Zone.We find that the orientation of the main stress of focal mechanism is predominant.Focal rupture plane exposes the general state of the modern tectonic stress field of the Fault Zone and shows the main features of focal rupture.The stress field and features of the focal rupture in north segment are remarkably different from the ones in the middle segment but highly similar with the ones in south segment.

关 键 词：震源机制解 构造应力场 震源破裂 

分 类 号：P315.2[天文地球—地震学]