山西交城断裂活动的构造地貌学研究

A Study on the Tectonogeomorphology along the Jiaocheng Fault, Shanxi Province

交城断裂位于山西地堑系的中部,为太原断陷盆地的控制断裂,总体走向NE,全长130km。该断裂在地表连续出露,由一组阶梯状正断层组成,断面向SE或E倾斜,倾角较大。断裂自上新世以来活动强烈,上盘断陷沉降4600m,沉降中心在清徐—交城—带,普遍错断上新统与更新统地层,局部地段错断全新统,形成了多种类型的构造地貌。

The Jiaocheng fault is a normal fault that strongly active in late Quaternary.During its development,there formed a series of tectonic landscapes including planation surface,river terraces,Holocene fault scarps and alluvial fans.All of these are carefully measured and dated in this study.Using available data,we have analyzed the fault slip rate and its segmentation.