摘要
根据四川地区北西向新构造的形成时间、切割关系、水系控制、内部压力、断裂活动、震中分布、裂度展布等特征，采用平面应力状态理论分析方法，确定现今区域主压应力为ＮＥ－ＳＷ向，在其控制下的局部发震机制及主压应力方向与区域主压应力方向有别，并有规律可循。
On the basis of phase and crosscutting relationship of NW-trending neotectonics,drainage control,crustal stress,faulting,epicenter loeation and earthquake intensity distribution in Sichuan and by means of theoretical analysis of plane stress state this paper points out the present NE-SW regional principal compressive stress and local earthquake-triggering mechanism with a principal compressive stress different in direction from the regional principal compressive stress under the control of it.
出处
《四川地质学报》
1994年第2期81-87,共7页
Acta Geologica Sichuan
关键词
北西向断裂
应力集中带
发震机制
四川地区
NW-trending fracture
stress concentration zone
earthquake-triggering mechanism,Sichuan region
