蒙其古尔铀矿床侏罗系含水岩组地下水水文地球化学特征与铀矿化的关系OA

The sandstone-type uranium deposits in the Yili basin are controlled by the groundwater activity,the study on the relationship between water chemical conditions and uranium mineralization will help the uranium exploration.Based on the research of chemical characteristics,radioactive chemical characteristics,uranium occurring forms and saturation degree of the groundwater in the Mengqiguer uranium deposit,the relationship between them and uranium mineralization was discussed.The uranium in the ore-bearing aquifer were found main occurring as[UO2(CO3)2]2-and[UO2(CO3)3]4-,and saturated in content,which is conducive to the precipitation of uranium minerals.Uranium in water is easier to migrate in the form of complexes under alkaline environments,but the migration ability will decreases in reducing environments,and resulting the precipitation and enrichment of uranium in the front line of the oxidation zone.The smaller the gradient value of the oxidation-reduction potential difference was found with the stronger the mineralization capacity.The established relationship between the water chemical characteristics and uranium mineralization will benefit the further uranium exploration of the Mengqiguer uranium deposit.