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本文概述了铀元素活化和迁移的物理-化学条件、铀沉淀条件及可能的沉淀机理。用热力学数据来估算温度达300℃的热液中各种铀的络合物的相对稳定性。依据氧化电位(氧逸度fo_2)和pH值计算出各种含水铀化学物和矿物的稳定条件。将这些铀化学物和矿物的稳定性同那些与铀矿伴(共)生的蚀变和脉石矿物的稳定性作了比较。用这些自然集合体来确定矿物的沉淀条件,提出了可能的沉淀机理。
This article summarizes the physical-chemical conditions for uranium activation and migration, uranium precipitation conditions, and possible precipitation mechanisms. Thermodynamic data were used to estimate the relative stability of the various uranium complexes in hydrothermal fluids up to 300 ° C. Based on the oxidation potential (fugacity fo_2) and pH values, the stability conditions of various aquifer uranium chemicals and minerals are calculated. The stability of these uranium chemistries and minerals is compared with those of alteration and gangue minerals of uranium mines. Using these natural aggregates to determine the precipitation conditions of the minerals, a possible precipitation mechanism is proposed.