济阳坳陷东北部埕东断层构造特征及演化过程

埕东断层是济阳坳陷东北部一条重要的控盆断裂.通过精细解译济阳坳陷埕东地区三维地震资料,并结合相干分析技术,对埕东断层的构造特征、断层性质、演化过程及其形成机制进行了深入研究.结果表明,埕东断层为一条特征明显的走滑断层,据其构造特征可将埕东断层分为南段（F1）和北段（F2）两部分.南段（F1）为埕东断层的主体,表现出明显的＂海豚效应＂;F2断层由一组走向北东、倾向南东的左阶羽状雁列带组成.埕东断裂的演化历史可划分为Ek-Es4期、Es3-Es2下期、Es2上-Ed期和Ng-Nm期4个时期.不同时期的区域构造环境,控制着埕东断层的形成及演化过程.

Characters and its evolutionary process of Chengdong fault in the northeast of Jiyang depression

Chengdong fault in the northeast of Jiyang depression is an important basin-controlling fault.Based on the fine interpretation of 3D seismic data of Chengdong area in Jiyang depression,and combined with correlation analysis technology,the structural characteristics as well as fault nature,evolution process and its formation mechanism were analyzed.The research results show that Chengdong fault is a characteristic strike-slip fault.According to the structural characteristics,Chengdong fault can be divided into two parts,the south section(F1) and north section(F2).F1 fault manifested "dolphin effect" is the main body of Chengdong fault.F2 fault is consisted of SE-trending left-order en-echelon faults.The development history of Chengdong fault could divide into four stages,including the deposition periods during Kongdian formation to Member 4 of Shahejie formation,Member 3 of Shahejie formation to Lower Member 2 of Shahejie formation,Upper Member 2 of Shahejie formation to Dongying formation and Guantao formation to Minghuazhen formation.Regional tectonic background during different time periods controls the formation and evolutionary process of Chengdong fault.