In airborne magnetic survey,the fault structure has great influence on the formation of orebodies in this mining area.In order to identify the fault structure distribution of the study area,the authors tentatively applied the edge enhancement methods.This paper mainly introduces three edge enhancement methods,i.e.,the tilt-depth,the non-absolute value of total derivative and the Theta angle.Meanwhile,it discusses the effects of various edge enhancement methods in combination with the upward continuation method through examples.The results suggest that various edge enhancement methods can identify the location of the fault structure,and that the tilt-depth method has an advantage in determining the depth of the fault structure.The non-absolute value of total derivative method can emphasize some small exceptions,and can also determine the attitude of fault structure.Theta angle method is superior to the other edge enhancement methods,and it has a higher recognition accuracy.The study results show that the combination of the edge enhancement methods and the upward continuation method can embody the advantages of the aeromagnetic data used in comprehensive interpretation.
魏永强, 倪卫冲, 房江奇. 边界增强法在航磁数据处理中的应用[J]. 物探与化探, 2016, 40(1): 117-124.
WEI Yong-Qiang, NI Wei-Chong, FANG Jiang-Qi. The application of the edge enhancement methods to aeromagnetic data processing. Geophysical and Geochemical Exploration, 2016, 40(1): 117-124.
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