层间氧化带砂岩型铀矿床微生物地球化学特征及与铀成矿的关系研究——以吐鲁番-哈密盆地十红滩铀矿床为例

通过样品采集、细菌培养和鉴定等，首次在中国大型的十红滩层间氧化带砂岩型铀矿床容矿层中发现不同种群的细菌。氧化带主要分布铁细菌、硫杆菌、硝化菌等好氧菌，矿石带主要分布厌氧的硫酸盐还原菌，其种类和数量上具明显的生物地球化学分带性，并与岩石的地球化学分带性一致。首次利用容矿层的硫酸盐还原菌在室内进行了硫酸盐还原试验。根据细菌的代谢特征，结合硫酸盐还原菌还原试验，分析了细菌在层间氧化带形成、铀氧化迁移和还原成矿过程中的作用。

The Microbial Geochemical Characteristic of Interlayer Oxidized Zone Type Sandstone Uranium Deposit and Analyse on Relation to Metallogenesis of Uranium——A Case Study of the Shihongtan Uranium Deposit in Turpan-Hami Basin

The distinct species of bacterial are first found in ore hosting bed rock of large Shihongtan interlayer oxidized zone type sandstonge uranium deposit in Turpan--Hami Basin, northwest China, by means of sampling, bacterial culured and distinguished. The aerobic bacterium including iron bacterium, thiobacillus, nitrobacteraceae, distribute in oxidizing zone, the anaerobic bacterium do in ore hosting bed rock. There are well zonation of biologic geochemistry in species and quantity. This zonation is in concordance with zonation of geochemistry. Based on metabolic chacteristic and experimental result of sulfates reducted by sulfate reducing bacteria, the paper analyes role of bacterial in oxidized zone formed, uranium oxidized and solubilizated, uranium reducted and metallogenesis.