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本文主要内容包括两部分:第一部分是分析盆地内部结构和新生代以来构造活动特点,对盆地边缘断裂的性质,展布方向、活动特点以及边缘断裂对盆地形成的控制作用;第二部分是对盆地地区地震活动的某些特点作了初步分析,其中包括地震活动和断裂关系、地震活动在垂向和平面上的分布特点以及震源机制解的某些特征。在上述研究的基础上,作者提出华北西部地区新生代断陷盆地和华北东部平原区地堑系的形成机制具有明显的差异。
The main contents of this paper include two parts. The first part is about the tectonic activities since the interior structure and Cenozoic in the basin. The second part is about the characteristics of tectonic activities, the nature of the fault, the spreading direction, the characteristics of the activities and the control of the formation of the basin by the edge faults. Some characteristics of the seismic activity in the basin have been preliminarily analyzed, including the relationship between the seismic activity and the fault, the vertical and horizontal distribution of the seismic activity and some features of focal mechanism solutions. Based on the above studies, the authors propose that there are obvious differences in the formation mechanism of the Cenozoic rift basins in western North China and the graben areas in the eastern part of North China.