Comparative Analysis of Geochemical Characteristics of Rare Earth Elements in Sandstone Type Uranium Deposits in Xinjiang——Taking the Ili Basin Uranium Deposit and Bashbulak Uranium Deposit as Examples
By analyzing the geochemical behavior characteristics of rare earth elements in the interlayer oxidation zone sandstone type uranium deposit in the Ili Basin and comparing the rocks in the source area,it is preliminarily believed that the rare earth elements in this area mainly come from andesite and granite in the source area,and are not related to basalt;right ∑ REE's research indicates that in the interlayer oxidized rock zone ∑ REE has incurred losses;Through the study of the differentiation of REE,it is believed that the degree of differentiation of REE varies in different zones,with the highest degree of differentiation in the ore zone,which is more enriched in LREE.Moreover,as the rock particle size increases,the differentiation of LREE and HREE also tends to increase;Analysis of the geochemical characteristics of rare earth elements in the Bashbulak sandstone type uranium deposit indicates that the ore ∑ REE is significantly lower than the surrounding rock ∑ REE,ore and surrounding rock ∑ there are significant differences in REE,which may be due to a large amount of REE being lost by leaching during the process of diagenesis,mineralization,and transportation of the deposit.However,the REE distribution pattern of the surrounding rock is basically consistent with that of the ore,which also reflects the inheritance characteristics of diagenesis and mineralization in the area.Through the study of the pH distribution of fluids and rocks in the Ili Basin,it is shown that the pH values of interlayer oxidized rock zones and primary reduced rock zones are similar,while the pH values of ore zones are low.This is consistent with the fact that under slightly alkaline conditions,REE and U complexes are easily formed,and REE and U complexes migrate and precipitate and enrich with the decrease of pH value.
the interlayer oxidation zone sandstone type uranium deposit in the Yili Basinbashbulak sandstone type uranium depositRare Earth Elementsgeochemistryuranium
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