十红滩铀矿床中微生物及其成矿作用实验研究

利用生物学方法对新疆十红滩铀矿床各亚带中的微生物进行了分离和鉴定，利用矿床中赋存的硫酸盐还原菌对矿床地下水中的铀进行了还原实验，并设计了水—岩—菌三相实验系统对铀矿床中的微生物成矿作用进行了模拟实验。结果表明:十红滩铀矿不同亚带岩石中主要微生物类群的分布特征不同，呈现出明显的生物地球化学分带性。其中优势菌硫酸盐还原菌能够通过代谢作用将矿床地下水中的铀还原沉淀。硫酸盐还原菌也可利用岩石中的有机碳作为营养物质进行生长繁殖，并将铀还原沉淀。

Microbe in the Shihongtan Uranium Deposit and Their Metallogenic Significance

By using biological method,microorganisms in the Shihongtan uranium deposit were isolated and identified,and using sulfate-reducing bacteria effected on uranium in the deposit underwater.The simulation experiment of the function of microorganisms during the formation of uranium deposit could be done by the water-rock-bacteria three-phase experiment system.The result showed that the distribution of the main microbe groups in the subzones were different and the geochemical characteristics was obvious to show that uranium could be reduced and precipitated by sulfate-reducing bacteria through metabolism function.The result of the reductive reducing experiment indicated that sulfate-reducing bacteria could absorb organic carbon as nutrition materials to grow,at the same time,uranium was reduced and precipitated.