断层活动应力轴的确定及首都圈应力场  

DETERMINANIING STRESS AXIS OF FAULT ACTIVITY AND STRESS FIELD OF CAPITAL CIRCLE

作　　者：郭良迁[1] 

机构地区：[1]中国地震局第一地形变监测中心

出　　处：《东北地震研究》1998年第3期50-57,共8页Seismological Research of Northeast China

基　　金：国家地震局95-04-07-03-04项目资助

摘　　要：本文从应力应变关系的基础上给出了利用断层形变资料计算断层活动的水平主应力方向的公式，并用邢台、唐山和海城的地震断层形变资料求解了主应力方向，其结果和震源机制解一致。还用首都圈跨断层资料计算了水平主应力轴，结果表明主应力优势方向为ＮＥ５０°～ＮＥ７０°。The formula calculating the direction of horizontal main stress about fault activity has been given by fault deformation data on the basis of stress-strain relation. Having used the deformation data of seismic faults for Xingtai, Haicheng and earthquake, their main stress direction has been obtained, respectively, The results are consistent with their earthquake focal mechanism. The horizontal main stress axises of capital circle area are also calculated by the data of crossing fault. The results show that superior direction of main stress is 50°～70°, and there exists no obvious change for ten years.

关 键 词：断层活动 应力轴 应力场 首都圈 地震地质 

分 类 号：P315.2[天文地球—地震学] P542.3[天文地球—固体地球物理学]