北天山地区活动构造形变特征与地震活动研究

摘要

This paper analyzed characteristics of vertical movement on main faults located on pied-mont tectonic belt of northern Tianshan and summarized corresponding relationship between anomaly data and earthquakes using observation data of leveling line across fault in northern Tianshan from 2001 to 2014 .They also explained efficiency and effect of observation data for earthquake predic-tion.The results showed : piedmont region of northern Tianshan appeared inheritance motion at present and anomalies corresponding with earthquakes .Anomalies of several survey lines were rela-tively concentrated before earthquakes with MS5.0~6.0 especially for sevey lines on the same fault , but anomalies of strong earthquakes with MS6.0 appeared a slow tendency deformation .%利用2001～2011年以来的北天山地区跨断层水准测量资料，对北天山山前构造带上的主要断层垂直运动特征进行分析，并总结这一时间尺度资料所反映出的一些异常变化与地震的对应关系，客观地对跨断层垂直形变测量资料在该地区地震预测方面的作用和效能进行解释。研究结果表明：现今北天山山前地区地壳运动以继承性运动为主。震前形变异常与发震具有一定的相关性。在研究区内发生5．0～6．0级地震前，若干条测线会同步出现相对集中的异常，出现异常的频次明显增加，特别是处于同一构造带上的测线异常表现更加明显，而6．0级以上的强震则表现出一种趋势性慢形变的异常过程。