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利用北天山中段最新的流动重力观测数据,通过整理计算平差,绘制该地区半年和一年尺度的重力场变化图像;选取横跨北天山中段乌鲁木齐、独山子两条测线,并分别绘制其重力剖面变化图;结合北天山中段地区动力构造环境,剖析该地区重力变化特征及其与地震孕育之间的关系。分析表明:北天山中段地区重力异常变化值不大,重力变化等值线图和剖面变化图均能较好地反映重力场随时空变化特征;北天山中段动态重力变化特征基本反映了该地区动力构造运动的外部环境;研究区域内的重力场空间格局分布特征较清晰,其重力变化具有明显的分区特征,山体和盆地之间的重力变化具有显著差异,山体与盆地边缘正负重力变化交替出现,且变化相对较平稳。
Based on the latest mobile gravity observation data in the middle section of North Tianshan Mountains, the gravitational field images of the six-year and one-year scales in the area were plotted and adjusted by calculating the adjustment. Two lines crossing Urumqi and Dushanzi in the middle section of northern Tianshan Mountains were drawn and drawn separately According to the dynamic tectonic environment in the middle section of North Tianshan Mountains, the paper analyzes the features of gravity variation in this area and its relationship with earthquake gestation. The analysis shows that the gravity anomalies in the middle part of the northern Tianshan Mountains have little change, and the contour diagrams of gravity and the change of the profiles can reflect the characteristics of the gravitational field with time and space. The characteristics of the dynamic gravity in the middle section of the northern Tianshan basically reflect the power of the area The spatial distribution of gravity field in the study area has a clear distribution pattern and the gravitational change has obvious zoning characteristics. The gravimetric changes between the mountain and the basin have significant differences, and the alternation of the positive and negative gravity changes between the mountain and the basin edge , And the change is relatively stable.