下辽河坳陷现代应力场特征

本文通过辽河油田的钻孔崩落资料及小地震震源机制解，推断出辽河坳陷地区现代构造应力场的特征。两种方法得到的结果基本一致，即区域应务场和局部应力场的结果一致，该地区处于走滑断层型应力状态。

The Characteristics of Stress Field in the Xia Liaohe Depression

The characteristic of the modern stress in the Xia Liaohe depression is deduced from well bore breakouts and focal mechamism of micro earthquakes. The results obtained from the two methods are showing no difference,i.e.the orientations of local and regional stress fields are identical. This means that the depression is in state of strike slip fault and that in the northern and southern part of the depression the maximum horizontal principal compressive stress axis lie in the direction of EW inferred from dominant azimuths,while in middle part of the differential stress of two horizontal principal stress S H and S h is not clealy indicated from no dominant azimuths.