摘要
北京南口山前断层为军都山隆起与京西丘陵平原区的分界断层 ,也是北京拗陷西部的一条控盆断层 ,是首都圈范围内具有发震背景的危险断层之一。在前人对南口山前断层研究的基础上 ,笔者进行了野外实地考察和综合分析。根据断层的几何结构和活动性特征 ,将南口山前断层分为四段 :琉璃庙 上口段 ( 4 0km)、上口 南口段 ( 1 5km)、南口 白羊城段 ( 1 3km)和白羊城 沿河城段 ( 30km)。其中南口 白羊城段活动程度最高 。
The nankou mountain frontal fault is a dividing line between the Jundushan uplift and the hill-plain area west of Beijing.It is also a fault that controls the evolutions of basins in the west of Beijing downwarp.It is one of the most dangerous faults that has a background for earthquakes in Beijing area.On the basis of prehumen's study, we make a field-investigation and synthetical analysis.According to geometrical structure and activity features, the Nankou mountain frontal fault is divided into 4 segments: Liulimiao-Shangkou (40km), Shangkou-Nankou (15km), Nankou-Baiyangcheng (13km), Baiyangcheng-Yanhecheng (30km).Of that,the Nankou-Baiyangcheng segment is the main body of the Nankou mountain frontal fault, which has a structural background for generating middle-mightiness earthquakes.
出处
《东北地震研究》
2001年第4期9-16,共8页
Seismological Research of Northeast China
关键词
南口山前断层
活断层
断层分段
地震
The Nankou mountain frontal fault
Active fault
Fault segmentation
