东胜铀矿床中主要微生物成矿因素实验研究  

Experimental Study on the Main Microbial Ore-forming Factors in Dongsheng Uranium Deposit

作　　者：耿海波[1] 付世骞 师明川[2] 张加赢 郭会灿[1] 安丽平 GENG HaiBo;FU ShiQian;SHI MingChuan;ZHANG JiaYing;GUO HuiCan;AN LiPing(Department of Food and Drug Engineering,Shijiazhuang University of Applied Technology,Shijiazhuang 050081,China;Sixth Geological Brigade,Hebei Geological and Mining Bureau,Shijiazhuang 050085,China;Basic Medical College,Hebei University of Chinese Medicine,Shijiazhuang 050200,China)

机构地区：[1]石家庄职业技术学院食品与药品工程系,石家庄050081 [2]河北省地矿局第六地质大队,石家庄050085 [3]河北中医学院基础医学院,石家庄050200

出　　处：《沉积学报》2023年第3期684-692,共9页Acta Sedimentologica Sinica

基　　金：河北省教育厅指导项目(Z2019033);河北中医学院教育教学改革研究课题(21yb-91)。

摘　　要：为研究砂岩型铀矿成矿过程中的主要微生物因素,对东胜砂岩型铀矿直罗组不同地球化学蚀变带中岩石样品进行生物学分析,发现各亚带中分布着不同种属的微生物,它们在铀矿床中的分布呈现一定的地球化学分带性,硫酸盐还原菌为其中的优势菌群,其中过渡带和矿石带中以具芽孢的Desulfotomaculumorientis为主;通过其对铀试剂的还原实验发现,Desulfotomaculum orientis是还原能力最强的细菌种属,且芽孢菌比例和铀矿分布呈现正相关性,通过进一步模拟实验证明,天然铀矿环境中的Desulfotomaculum orientis和模拟实验培养的菌体芽孢比例拟合度较高,证明Desulfotomaculum orientis是铀矿成矿中主要的微生物因素,它们在利用矿床中的营养成分增殖过程中可以将U(VI)还原为U(IV)并沉淀析出,促进矿床的形成。研究结果可对铀矿的生物成矿作用提供参考,同时对于生物找矿工作具有指导意义。In order to study the main microbial factors in the mineralization process of sandstone-type uranium(U) deposits,the biological analysis of rock samples in different geochemical alteration zones from the Zhiluo Formation of the Dongsheng sandstone-type uranium deposits was conducted and revealed that different species of uranium are distributed in each subzone.The distribution of microorganisms in uranium deposits presents a certain degree of geochemical zoning.Sulfate-reducing bacteria are the dominant bacteria in uranium ore,and the spore-containing Desulfotomaculum Orientis is the main species in the transition zone and ore zone.Through reduction experiments on uranium reagents,we found that Desulfotomaculum Orientis is the bacteria with the strongest reducing ability,and the proportion of spores and the distribution of uranium deposits are positively correlated.Further simulation experiments prove that the proportion of Desulfotomaculum Orientis spores in natural uranium deposits and the proportion of bacterial spores cultured in simulation experiments have a higher degree of fit,which proves that Desulfotomaculum Orientis is the main microbial factor in the formation of uranium deposits.They can reduce U(VI) to U(IV) and precipitate out by using the nutrients in the deposit to promote the formation of the deposit.The research results provide reference for the biological mineralization of uranium deposits and also have indicative significance for biological ore prospecting.

关 键 词：细菌 成矿作用 砂岩型铀矿 芽孢 硫酸盐还原菌 

分 类 号：P611[天文地球—矿床学]