Study On Element Distribution Characteristics And Exploration Methods Of Sandstone-type Uranium Deposits In Erlian Basin

As a strategic resource and an important energy source for the development of nuclear power,uranium plays a very important role in the development of our country.In recent years,the country has vigorously developed nuclear power and other new energy sources,and there is a great demand for uranium resources.In the past two decades,with the development of in-situ immersed mining technology,my country's uranium exploration focus has gradually shifted to the northern arid basins.Large-scale uranium mines have been discovered in Songliao Basin,Erlian Basin,Ordos Basin and Tuha Basin.Super-large sandstone-type uranium deposits,making sandstone-type uranium deposits become the type with the highest proportion of uranium deposits in my country.In this paper,the Erlian Basin Erennaoer Depression is the research area,the spatial distribution characteristics of the elements in the area are analyzed,and the distribution characteristics of the elements in the soil and plants are analyzed,and the soil and plant exploration methods are preliminary studied.The geochemical parameters of 47 major and trace elements and 7 oxides were calculated on the 1:250,000 soil regional geochemical exploration data in the study area,and the enrichment coefficient and variation coefficient were integrated,and it was considered that Ba,Co,Mn,Mo,Pb,Sn,Th,U,V,Zn and Zr have mineralization potential in the region.Correlation analysis,R-type cluster analysis and factor analysis are carried out on Ba,Co,Mn,Mo,Pb,Sn,Th,U,V,Zn and Zr.The element combinations are mainly divided into 3 groups: Th-Zr-V-Mn-Sn-?REE combination,U-Mo combination and Pb-Zn-Co-Ba combination.Among them,Mo,Th,V and U have the highest correlation.The concentration centers of U in the area are mainly distributed in the north-central and southwestern parts,and the background area is mainly distributed in parts of the central and eastern parts.The spatial distribution of Mo,V,Th and ?REE is very similar to that of U.Concentration centers are distributed in the granite area and the area where the argillaceous sandstone and mudstone of the Erlian Formation are located.The distribution of U in the vertical direction is mainly characterized by being enriched in the reducing zone and depleted in the oxidation zone.Experiments on soil and plant geochemical exploration methods have been carried out in the research area.The contents of U and associated elements Mo,V,and Th all increase with the decrease of particle size.After analyzing the content of U and Mo in the plant and its root soil,it is found that the plant has inherited the element distribution characteristics in the soil,indicating that the plant in the study area can be used as a sampling medium for mineral exploration.