北天山地震带的地壳形变过程、特征及其与地震活动的关系

THE COURSE AND CHARACTERISTIC OF CRUSTAL DEFORMATIONS AND CORREUT ION WITH SEISMICITY ON THE NORTH TIANSHAN SEISMIC ZONE

本文利用流动形变测量资料,对北天山地震带的地壳形变过程、特征进行了分析讨论,认为北天山地震带地形变具有趋势性、同步性、阶段性,水平形变量大于垂直形变量,并且北天山地震带的地壳活动方式继承了新构造运动。同时,对北天山地震带上的地形变与地震活动的关系也做了探讨,认为地震前后,地壳在垂直形变方面具有“N”字形变化模式,并指出北天山地震带在地震过程中有一形变衰减波存在。本文分析、处理了自1971年至1986年以来的北天山地震带上十几条跨断裂流动水准测线资科、1982—1986年的水平形变网资料,以及乌市跨断层形变台站的部分地道水准测量资料,力求揭示它们所控制的断裂带及地区的形变过程、特征及其与地震活动的关系,并找出其中的活动规律。

The paper analysed the characteristics of crustal deformations on the North Tianshan seismic zone with mobile deformation measuring data,thinking that the crustal deformations on the North Tianshan seismic zone are of tendency,stage and synchronism.The horizontal deformations are larger than the vertical one,and the crustal movements of this zone have inherited the New Tectonic Movement.Meanwhile,it also approached the relations between the crustal deformations of the zone and the seismjci-ty,pointing out that the crust in vertical deformations has"N"changing model and there exists a deformation attenuation wave in the seismic course of the North Tianshan seismic zone.