地球化学模式在二连盆地中东部砂岩型铀矿床中的应用研究  

Application of Geochemical Model in the Prediction of Sandstone-Type Uranium Deposits in Eastern Erlian Basin

作　　者：郝进庭[1] 

机构地区：[1]核工业208大队,内蒙古包头014010

出　　处：《铀矿地质》2013年第1期24-30,46,共8页Uranium Geology

摘　　要：文章采用PHREEQC模式程序,对研究区地下水的水文地球化学环境进行了模拟,确定水中铀的存在形式、水中沥青铀矿饱和指数(SI)和反应条件指数(RCI)等水文地球化学参数;分析了地层中铀所处状态与水中Eh值、pH值、铀浓度的关系;证明了水的Eh值是控制铀成矿作用的最主要因素;对砂岩型铀矿床的形成及其定位的水文地球化学条件进行了较系统研究和探讨;对砂岩型铀矿成矿水文地球化学机理进行了论证和计算;阐述了铀活化迁移、沉淀富集的本质规律;也为水文地球化学方法研究砂岩型铀矿的成矿预测和矿床定位提供了重要依据。This paper used the PHREEQC model procedure to simulate the mineralization hydrogeochem ieal feature of the groundwater in research area. By confirming the uranium occurrence modality, the sat- uration index （SI） and the reaction condition index （RCI） o{ the uraninite and other hydrogeochemica[ en- vironment parameters, the relations of uranium in layers to the Eh, pH and uranium concentration in groundwater was analyzed and had proven that the Eh of groundwater is the most important controlling factor over uranium mineralization; the hydrogeochemical condition for the formation and localization of sandstone deposit was also studied and discussed to elaborated the uranium migration and the precipitati on pattern. The above research can provide important criterior for the application of hydrogeochemical method in the predication and localization of sandstone-type uranium deposit.

关 键 词：二连盆地 砂岩型铀矿床 地球化学模式 成矿水文地球化学机理 

分 类 号：P614.3[天文地球—矿床学]