河北省怀安盆地北缘断裂活动性研究

RESEARCH ON ACTIVITY OF THE NORTHERN MARGIN FAULT OF THE HUAIAN BASIN IN HEBEI PROVINCE

本文以野外地质调查为主，讨论了怀安盆地北缘断裂的几何展布和活动特征，并进行了断裂的活动性分段，对断裂的运动学特征也进行了探讨。研究认为，该断裂是一条第四纪活动断裂，以东段活动性最强，Ｑ３２以来平均垂直滑动速率达０．２１—０．２２ｍｍ／ａ；中段活动次之，西段活动较弱，整个断裂活动年代有自西南向东北迁移的趋势。最后，文章对１６２６年级地震的震中位置作了讨论。

This paper, by the method of field research, discusses the geometric distribution and active character of the Northern Margin Fault of the Huaian Basin. The paper segments the fault according to its activity and then discusses the kinematic character of the fault. Research has proved that the fault is an active fault which has actived since Quaternary. The east segment has the higiest activity and its averagevertical slip rate is 0. 21 -0. 22mm/a since the middle of the late Pleistocene; the activity of the middlesegment is secondary to the east one and the west segment has a minor activity. The active time of thefault has a migrating tendency from the southwest to northeast. Finally, the paper discusses the locationof the epicenter of 1628 M6 earthquake.