安宁河活动断裂带的新活动性

晚更新世开始具有强烈新活动性的安宁河断裂，全长近150千米，总体走向呈近南北，从断裂几何结构可明显地分成南（小盐井-西宁）、北（小盐井-田湾）两段。由数十条次级断层组成的安宁河活断裂带，无论从断层证据、微地貌、突变带还是地震活动等均表明这是一条以左旋水平走滑为主，具有强烈挤压特征的最新活动断裂带。

New Activity on Anninghe Fault

Since the late Pleistocene, Anninghe fault which covers about 150 kilometers have been in the intensely active status. It runs almost from north to south. Based on the geometric structure of the fault, the fracture belt can be divided into two parts. The north part is from Xiaoyanjing to Xuuing and the south part is from Xiaoyanjing to Tianwan. Anninghe fault consists of many sub - faults. The fault evidence, the suddenly changing belts of micro terrain and the seismicity show that Anninghe fault is a newly active fault with left - alteral slip movement and intensely compressive characteristics.