摘要
本文通过辽河油田的钻孔崩落资料及小地震震源机制解，推断出下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，即区域应力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。在坳陷北部及南部地区崩落优势明显，表现出水平最大主应力方向呈ＥＷ向；而在坳陷中部地区，崩落优势方向不明显，反映了该地区两水平主应力大小相差不大。
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.
出处
《中国地震》
CSCD
北大核心
1997年第2期114-119,共6页
Earthquake Research in China
基金
国家自然基金
