福建地区震源机制解与现代构造应力场研究  

RESEARCH ON FOCAL MECHANISM SOLUTIONS AND TECTONIC STRESS FIELD IN FUJIAN REGION

作　　者：林松建[1] 丁学仁[1] 陈为伟[1] 陈祥熊[1] 

机构地区：[1]福建省地震局,福州350003

出　　处：《大地测量与地球动力学》2009年第5期27-32,共6页Journal of Geodesy and Geodynamics

基　　金：福建省地震局项目

摘　　要：研究了1996—2005年福建及邻区52次中小地震的震源机制和6组综合震源机制解,认为福建地区现今构造运动主要以拉张走滑运动为主,主压应力轴（P轴）总体为NW方向（300-320°）。其中,沿海地区,地震破裂以走滑运动为主;内陆地区,地震以正断性质为主。主压应力轴方向自北而南呈规则性变化,北部（闽江断裂带附近）主压应力轴方向主要为NNW向;南部闽粤交界附近主压应力轴方向为NWW至近EW方向。This paper analyzes the focal mechanism solutions of 52 medium - small earthquakes and 6 groups of composite focal mechanism solutions in Fujian region and its vicinities from 1996 to 2005. The conclusions are as follows： 1 ）The major tectonic movement in Fujian is tensional strike slip;2）The maximum principal stress axis （P -axis） of Fujian is mainly in NW direction ,300 -320° ;3 ）There are mainly strike slip earthquakes in the costal region, and normal fault earthquakes in the inland region ;4）The P-axis directions change regularly from the north to south of Fujian region which are NNW in the north and NWW to near EW in the south.

关 键 词：福建地区 震源机制解 构造应力场 中小地震 主压应力 

分 类 号：P315.727[天文地球—地震学]