北部湾地震的震源机制及地震地质条件  

FOCAL MECHANISM AND SEISMIC GEOLOGIC CONDITIONS OF THE BEIBUWAN EARTHQUAKES

作　　者：尹克坚 吴时平 王林 

机构地区：[1]广西壮族自治区地震局

出　　处：《华南地震》1996年第3期77-81,共5页South China Journal of Seismology

摘　　要：对北部湾地震的震源机制解和地震地质条件进行了详细分析，认为靖西－崇左断裂带过震中的北北西向断层为发震断裂；四会－吴川断裂带过震中的北东东向断层为控震构造。震源构造应力场的主压应力方向为北西－南东向，发震断层的活动方式既有垂直差异运动又有走滑运动。The focal mechanism solution and seismic geologic conditions of the Beibuwan earthquakes are discussed.The fault which belongs to Jingxi-Chongzuo fault zone in NW-SE direction and crosses the epicenter is the seismogenic fault.The fault which belongs to Sihui-Wuchuan fault zone in NE-SW direction and crosses the epicenter must have some effects on this seismic sequence.The main pressure direction of the focal stress field is in NW-SE direction.The Beibuwan basin and the fault in and around it inherit the past active model still now.

关 键 词：震源机制 震源模式 北部湾地震 地震地质 

分 类 号：P315.3[天文地球—地震学] P315.2[天文地球—固体地球物理学]