辽河盆地构造分析

Structure Analysis about Liaohe Basin

应用构造分析理论和方法，对辽河盆地构造断裂，进行了系统、深入的研究。构造几何学综合分析认为主干断裂具有发育的多期性、性质的多样性和展布的分段性等特点；按伸展、走滑、挤压和其他类型总结分析盆地构造样式共有5大类、12个亚类。构造运动学分析认为盆地以伸展作用为主，并受后期走滑作用的改造，运动形式比较复杂，同时定量计算了伸展量、走滑量和断块旋转量。结合火山岩特征、大地电磁测深和现代地震资料，探讨了辽河盆地形成与演化。

The paper makes a systemic and thorough studies to the structure fracture in Liaohe Basin by using the theory and method of structure analysis. Through comprehensive analysis of the tectonic geometry.authors think that main fracture are developed in multi-period,the characters are complicated and the spreads are in segments. According to extending. sliding,extrusion and other ways. the basin structure may be summarized and analyzed,and then divided into five categories or twelve subcategories.Tecto-kinematics thinks that extending function is major motion for basin and also make the basin transformed by later sliding function. So the motion is more complicated Meanwhile,the tecto--kinematics gives a quantitative calcubation for extending. sliding and fault rotation.In combihation with colcanics characteristics,magnetotelluric sounding and modern seismic informations,the paper probes into the formation and evolution of Liaohe Basin.