The application of information entropy subinterval area median contrast filtering method to extracting the abnormal soil gas radon concentrations: A case study of Huahai basin, Ganshu Province
LEI Bo1,2(), LAN Ming1(), HE Feng3, LU Bao-Long4, LUO Cai-Wu1
1. School of Resource, Environment and Safety Engineering,University of South China, Hengyang 421001, China 2. Institut de Physique du Goble de Paris, Université de Paris,Paris 75005 3. Beijing Research Institute of Uranium Geology,Beijing 100029, China 4. No.203 Research Institute of Nuclear Industry,Xianyang 712000, China
Huahai basin is in the western edge of the corridor basin group in Gansu Province. Based on the results of soil gas radon concentration measurement and the background structural and evolution law of Huahai basin, the authors analyzed the characteristics of the abnormal fields by the Information Entropy Subinterval Area Median Contrast Filtering (SAMCF) Method. The results were different with the different m and n paraments by using SAMCF method. It also showed that the entropy varied from 2.5 to 3.6. The relationship of entropy and m and n was complexity. However, it varied like a "U" sharp with the incease of k parament. When the k varied from 15 to 20, the minimum entropy was gotten showing the western party of the study area with anomaly radon gas in the soil, is the favorable area for deep uranium exploration.
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LEI Bo, LAN Ming, HE Feng, LU Bao-Long, LUO Cai-Wu. The application of information entropy subinterval area median contrast filtering method to extracting the abnormal soil gas radon concentrations: A case study of Huahai basin, Ganshu Province. Geophysical and Geochemical Exploration, 2021, 45(4): 1064-1070.
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