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为了取得邢台地震区地壳细结构,对该区进行了综合地球物理方法探测,其中电磁阵列剖面法(EMAP)测量在我国尚属首次.EMAP剖面穿过邢台7.2级地震区,经过EMAP阻抗求取、空间滤波处理和二维反演解释,剖面显示出清晰的地壳电性细结构特征:4km以上电性简单,4—20km深度电性复杂;震源区电性复杂,非源区简单;发震深度变化复杂;震源区电性突变,显示隐伏高角度断裂,高寻层不连续部位为发震部位.其观测结果对于了解该区的构造背景、发震构造和深部构造的关系有重要意义.
In order to obtain fine crustal structure in Xingtai earthquake area, a comprehensive geophysical exploration was conducted in this area, of which EMAP measurement is the first time in our country. The EMAP profile passes through the 7.2 magnitude earthquake area in Xingtai and is interpreted by EMAP impedance, spatial filtering and two-dimensional inversion. The sections show clear crust electrical fine structure features: simple electrical characteristics over 4km and depths of 4-20km Electrical complex; source area of complex electrical, non-source area is simple; complex changes in seismogenic depth; sudden change in electrical source area, showing hidden high-angle fracture, high-level discontinuity is seismogenic sites. The observation results are of great significance for understanding the tectonic setting of the area, the relationship between seismogenic structures and deep structures.