伊犁盆地蒙其古尔铀矿床水文地球化学模拟研究

水成铀矿床的形成受控于水文地球化学环境的变化,水-岩体系的pH、Eh值和水化学成分的改变是铀富集成矿的关键因素。笔者根据地质、水文及水化学分析资料,应用PHREEQC软件对伊犁盆地蒙其古尔铀矿床三工河组地下水系统中发生的水文地球化学过程进行模拟,以期确定:1)层间水在径流过程中与含水层发生的化学反应;2)水-岩化学反应发生的条件及进行的程度;3)体系中铀的水文地球化学行为及其成矿的有利条件。

Hydrogeochemical Modeling Study on Mengqiguer Uranium Deposit in Yili Basin

The formation of hydrogenic uranium deposit is believed to be controlled by the change of hydrogeochemical environment.The key factors influencing the enrichment and mineralization of uranium are the changes of Eh-pH and water chemical composition in the water-rock system during the evolution of hydrochemistry.Based on the geology,hydrology and water chemical analysis data,the hydrogeochemical process of the underground water system in Mengqiguer uranium deposit was emulated with PHREEQC software so as to study the chemical reaction which occurred during the process of interlayer water running through the aquifer,the condition and the degree of water-rock reaction and the hydrogeochemical behavior of uranium and the favorable conditions for uranium metallization.