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针对天山中段地区水平地壳形变特征最新动态的研究问题,提出了利用GPS连续站及流动站资料,基于速度场结果进行GPS剖面分析的方法来进行研究。结合速度场及剖面结果可以看出,北西走向的喀什河断裂带,1992—2011背景走滑运动为右旋走滑,2009—2014年右旋运动有所减弱,2013—2015年仍然较弱;天山中部的滑脱断层,1992—2011年的结果显示其走滑运动较不明显,但2009—2014期的结果表明出现了一定的左旋运动,2013—2015年的左旋运动加剧;天山中部的滑动速率结果显示出天山中段博罗科努断裂带中段变形速率较东西两侧均较小,值得进一步关注。研究结果利用了最新数据,显示了天山中段水平地壳形变的最新特征,为判定天山中段地区的地震危险性提供了支持。
In view of the latest research on horizontal crustal deformation in the middle Tianshan area, the paper presents a method of using GPS continuous and rover data and GPS profile analysis based on velocity field results. According to the results of velocity field and profile, it can be seen that the strike slip in the Kashgar fault belt moving northwest from 1992 to 2011 was dextral strike-slip, and the right-hand movement from 2009 to 2014 weakened and remained weak in 2013-2015. The results of 1992-2011 show that the strike-slip motion is less obvious. However, the results of 2009-2014 show that some left-lateral movement occurred, and the left-lateral movement intensified in 2013-2015. The slip rate in the central part of Tianshan Mountains The results show that the middle part of the Tianshan Boluo Ke Nuo fault zone deformation rate is smaller than both east and west, deserves further attention. The results of the study make use of the latest data and show the latest features of horizontal crustal deformation in the middle Tianshan Mountains and provide support for determining the seismic risk in the middle Tianshan region.