新疆喀什及邻近区域流动地磁和流动重力联合分析研究

利用2014-2015年南天山地区45个测点的2期流动地磁资料,分析喀什及邻近区域相邻两期岩石圈磁场的动态变化特征,同时,利用2014-2016年170个测点的4期流动重力资料,分析不同时间尺度的重力场动态变化信息。研究表明:皮山6.5级地震的发生对皮山一带的地磁矢量分布特征影响较大,总磁场强度、磁偏角和磁倾角均有变化;无论是半年尺度还是一年尺度的重力变化图像都显示乌恰一直处于重力变化的高梯度带;综合多手段的观测资料对震情形势的判定更为准确。

Mobile Magnetic and Gravity Survey in Kashi and Its Adjacent Regions

After Analyzing the dynamic variation characteristics of lithosphere magnetic in Kashi and its adjacent regions, by using 45 measuring points and two phases mobile geomagnetic data from 2014 to 2015 combining with 170 survey points and six stages of mobile gravity data from 2014 to 2016, we studied the dynamic change information of gravity field at different scales. The results show that the Pishan M_S 6.5 earthquake has great influence on the distribution of magnetic vector in Pishan, in which total intensity, magnetic declination and magnetic inclination also has changed. In general, Wuqia was always in high gradient belt at all scale of gravity field change images. We conclude that integrating multi-means of data is more reliable in determining the tendency of earthquakes.