A study of the method of extracting aeromagnetic weak anomalies from sandstone-type uranium deposits
YANG Yu-Qin1,2(), ZHANG Xiang1,2, SHI Lian-Cheng1,2, DENG De-Wei1,2
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China 2. Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology, Shijiazhuang 050002, China
In the Mesozoic and Cenozoic basin areas, the aeromagnetic ΔT anomaly information of sandstone-type uranium deposits is not obvious due to the influence of the basin cover layer, which directly affects the application effect of using aeromagnetic data to find sandstone-type uranium deposits. The research on the method of extracting weak information of aeromagnetic data in the basin can give full play to the role of aeromagnetic data in the exploration of sandstone-type uranium deposits. This paper summarizes the mechanism of the formation of weak aeromagnetic anomalies in sandstone-type uranium deposits, and analyzes and defines the quantitative range of weak aeromagnetic anomalies. On the basis of the 1∶50,000 high-precision aeromagnetic data and through the analysis and research on the aeromagnetic characteristics of the sandstone-type uranium deposits discovered in western Inner Mongolia, a high-pass filtering method was used to extract the aeromagnetic data above the sandstone-type uranium deposit. This method was used to carry out aeromagnetic weak anomaly extraction experiments in a uranium metallogenic belt in Erlian Basin of Inner Mongolia. The aeromagnetic weak anomaly information was extracted above three discovered interlayer oxidation zones of sandstone-type uranium deposits, thus finding a new way in the search for sandstone-type uranium deposits in the Meso-Cenozoic basin area.
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YANG Yu-Qin, ZHANG Xiang, SHI Lian-Cheng, DENG De-Wei. A study of the method of extracting aeromagnetic weak anomalies from sandstone-type uranium deposits. Geophysical and Geochemical Exploration, 2021, 45(1): 29-36.
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