关键词: 敦化-密山断裂带, 航磁特征, 深部构造, 小波多尺度分析, 居里面反演

Abstract: Abstract: This paper uses wavelet multi-scale analysis to invert aeromagnetic data from the northern end of the Dunhua-Mishan fault zone and surrounding areas, analyzes the magnetic characteristics of the crust at different depths, and analyzes the deep structural characteristics of the Dunhua-Mishan fault and surrounding faults. And the intersection relationship is explored, and the lower interface of the magnetic layer in the region is inverted by Parker method to obtain the inner depth of the region. The results show that in the shallow aeromagnetic source field, the shallow surface and upper crust media are more complex, and the Dunhua-Mishan fault zone shows a small-scale anomaly in the shape of multiple beads; in the deep aeromagnetic field, the middle and upper crust are mainly basin structural base rocks. The magnetic anomaly caused by the different magnetic properties, the fracture zone forms a magnetic gradient zone, and cuts through and affects the aeromagnetic characteristics to the inside. The buried depth of the interior of the region is 22.3～29.9km, and the deeper area is located in the south of Hulin County. The Dunhua-Mishan fault zone controls the interior distribution of the region, and finally combines the seismogenic law and the Moho surface Distribution, discussed the stability of the crust in the region. Key words: Dunhua-Mishan fault zone; aeromagnetic characteristics; deep structure; wavelet multi-scale analysis; inversion

Key words: Dunhua-Mishan fault zone, aeromagnetic characteristics, deep structure, wavelet multi-scale analysis, inversion