【摘要】 本文通过浅层地震勘探、工程地质钻探和探槽工程等技术手段对延庆盆地北缘断裂几何结构、活动年代、活动性状进行了研究。结果表明:断裂自姚家营至张山营段断层结构由5条断面逐渐收敛为2条,受边界条件制约其几何结构趋于简单。断裂距今7万年来存在三期主要活动,自晚更新世末期以来断裂活动强度明显趋缓。更多还原

【Abstract】 This paper investigates the geometry, age and mode of activity of the Yanqing Basin North Margin Fault Belt by means of shallow seismic sounding and engineering-geological techniques such as drilling and trenching. The result indicates that from Yaojiaying to Zhangshanying the geometrical structure of the fault belt tends to be simpler under the restriction of boundary conditions, the number of component faults reduces from 5 to 2. Since 70000 years B.P. there were mainly 3 stages of activities,and from the end of Late Pleistocene, the intensity of its activity decreased significantly.更多还原