Information Extraction And Application Of Hidden Uranium Deposits In Xiangshan Area

Due to deep burial and strong surface interference information,deep uranium deposit information is very weak.To effectively obtain weak information of deep uranium deposits,exploration methods with large exploration depths and data processing techniques can be used to mine and extract the original data.Therefore,in the Xiangshan area,a comprehensive radioactive exploration method using ground gamma ray spectroscopy,geogas,soil ²¹⁰Po,and soil natural thermoluminescence measurements is adopted.These methods have a large detection depth,especially because the geogas measurement has the characteristics of deep penetration of elements,and has excellent ore-showing ability for deep uranium deposits.Based on the previous research results,this paper based on the formation mechanism of deep uranium mineralization information,such as plutonium migration and geogas migration,and combined with the known geological characteristics of uranium deposits in the Xiangshan area,carried out regional variation coefficients of measured radioactive exploration data.Research on the application of several information extraction techniques including trend surface analysis,U₂ favorable uranium mineralization index,directional derivative,and spatial correlation analysis.The regional coefficient of variation reflects the heterogeneity of the distribution of radionuclide elements and the degree of geochemical activity in the survey area.The larger the coefficient of variation,the better the significance of the prospecting indication.Trend surface analysis fits the trend of regional changes in radioactive exploration data through mathematical surfaces,reflects the spatial data distribution,and isolates local changes.The favorable index of uranium mineralization U2 is to multiply the weak information by the product of the uranium value and the ratio of uranium thorium.A larger value of U2 indicates that uranium mineralization is more favorable.The directional derivative refers to the rate of change of a point in the nuclear radiation field along the measurement line direction,and the direction in which the rate of change is the largest can indicate the nuclide enrichment.The spatial correlation analysis method is used to study the spatial correlation between uranium and thorium nuclide after redistribution.The lower the correlation between uranium and thorium,the better it is to indicate the uranium mineralization zone.Finally,the Boolean logic method is used to comprehensively analyze the deep uranium information extracted by these methods.The following conclusions are obtained:(1)There are many methods for processing radioactive exploration data.This paper uses direction derivative,trend surface analysis,coefficient of variation,and comprehensive index of favorable uranium mineralization methods to extract radiological information anomalies that can effectively indicate deep mineralization and spatial correlation analysis.The method is generally effective in the measurement area.(2)Multi-information synthesis technology is an effective technical means to reduce the multiple solutions,which is essential in the extraction of deep uranium mineralization information.The Boolean logic method is used to analyze each layer that can highlight the abnormal information of uranium mineralization in the deep.Multivariate comprehensive analysis works well,and extracting radioactive information can significantly enhance weak anomalies in deep uranium deposits.(3)Since the Zoujiashan uranium deposit has been exposed in the survey area,it should be as far as possible when delineating favorable target areas in the deep.Based on the anomaly of deep information comprehensively extracted from the multivariate information,it is inferred that the areas near Xingshu,Xincun-Shangjialing,and Luojia west near the fault structure have great potential for deep mineralization.