二连盆地脑木根凹陷铀成矿水文地质特征浅析

Hydrogeological characteristics of uranium mineralization in naomugen sag,Erlian Basin

为取得二连盆地脑木根凹陷铀成矿水文地质条件,运用地下水动力学、水文地球化学、铀水文地球化学等知识,通过调查取样,分析数据,整理资料等进行研究。结果表明:该地区地下水水动力特征为从北西部、南东部的补给区向中部的排泄区径流;地下水水化学类型以Cl·HCO3-Na、Cl-Na型水为主,矿化度最高106.50 g/L,平均3.50 g/L;该地区地下水水中铀含量较高,平均值为120μg/L,最高值可达910μg/L,自然底数为56.00μg/L,水中氡浓度平均值为100 Bq/L,最高值可达14 985 Bq/L,自然底数为95 Bq/L。研究结果表明该地区地下水环境特征有以利于铀成矿、富集。

In order to obtain the hydrogeological conditions of uranium mineralization in Naomugen Sag of Erlian Basin,this paper applied the knowledge of groundwater dynamics,hydrogeochemistry and uranium hydrogeochemistry to conduct research through investigation and sampling,data analysis and data sorting. The results show that the hydrodynamic characteristics of groundwater in this area are runoff from the recharge area in the west and east of the north to the discharge area in the middle. The groundwater hydrochemical types are mainly Cl · HCO3-Na and Cl-Na water,with the highest salinity of 106. 50 g/L and the average of 3. 50 g/L. The average value of uranium in groundwater in this area is 120 μg/L,the highest value is 910 μg/L,and the natural base is 56. 00 μg/L. The average value of radon concentration in groundwater is 100 Bq/L,the highest value is14985 Bq/L,and the natural base is 95 Bq/L. The results show that the characteristics of groundwater environment in this area are beneficial to uranium mineralization and enrichment.