若尔盖铀矿床含矿热液性质的热力学研究

作者利用热力学方法研究了若尔盖铀矿床含矿热液的特性。研究结果表明，初始含矿热液具有高温高压性质，来源于深部，而不是大气降水或由大气降水成因的地下水，随着含矿热液的演化，从早阶段到晚阶段，其温度、压力、碱度及氧逸度降低，而氧化还原电位升高，说明铀在相对还原条件下迁移，而在相对氧化的成矿环境中被还原。

THE RMODYNAMIC STUDIES ON THE CHARACTERISTICS OF U-BEARING HYDROTHERMAL SOLUTIONS RESPONSIBLE FOR URANIUM DEPOSITS AT RUERGAI

The authors studied the characteristics of U-bearing hydrothermal solutions for Ruergai uranium deposits by thermodynamic methods. It turns out that the solutions were formed at high temperature and high pressure. It is clear that the solutions converged from depth, but not from atmospheric water or ground water. And with the evolution of physico-chemical conditions, the solutions were reduced in temperature, pressure, pH and fo,, but their Eh was increased from the early stage to the late stage. It is indicated that uranium was transported relatively reducing conditions and reduced under relatively oxidizing conditions.