土壤氡测量在砂岩型铀矿勘查中的应用研究OA

In order to rapid evaluate of sandstone-type uranium deposit prospecting,the soil radon measurement method was applied in the central area of Chagandelsu depression.The measurement data were statistically analyzed and processed.In calculating the lower abnormal limit of radon concentration values,three different extraction methods were compared,and the applicability of each method was analyzed.Comparative studies have found that the multifractal method can make full use of original data and weak anomaly information,effectively reduce interpolation interference,and has the best radon anomaly indication effect,which is closer to the reality of handling high value anomaly.Combined with the extracted lower limits of soil radon concentration anomalies,the formation and distribution characteristics of radon anomalies were summarized.It was found that the abnormal distribution range of soil radon in the measurement area is controlled by depression strata and faults.High-value and high-contrast radon anomalies often exist and form above the Yingen formation sand bodies at the front edge of the braided river delta in ancient channels.Based on this comprehensive interpretation,a total of three radon anomalies,CG-1,CG-2 and CG-3,were delineated the favorable areas for uranium mineralization.This study not only provided supporting basis for later drilling layout in chagandelesu area,but also presented an example reference for soil radon measurement,prospecting and anomaly delineation in similar uranium mining areas.