Abstract:

This paper deals with the activity of Nankou-Sunhe fault and its controling on the regionaltectonic activity based on the geodetic data.We think that Nankou-Sunhe fault is active recently,with a tension and counterclockwise rotation in the west of Dongshanqi．This fault acts as a con-trol on the regional tectonic activity in Capital Circle.The Nankou-sunhe fault is a trunk fault,with its activity strengthened recently.The fault and its relation to the generation of earthquakesmust be paid attention.

Key words: Nankou-Sunke fault, Beijing, Fault activity, Crustal deformation survey

摘要：

依据大地测量资料,分析研究了南口－孙河断层的活动性及其对区域构造活动的控制作用。研究认为,南口－孙河断层现今仍有活动,东三旗以西为张性反扭。该断层对首都圈构造活动具有控制作用,为一主干断层,近期活动增强。在首都圈构造活动性研究及地震趋势预测中,对南口－孙河断层必须予以足够的重视。

关键词: 南口－孙河断层, 北京, 断层活动性, 地壳形变测量