Microbial Flora. Shihongtan And Different Uranium Deposits In The Qaidam Distribution Characteristics

In nature, geochemical environment and the corresponding microbial growth exists between the relationship between certain, the rocks in different geological environment and groundwater development with corresponding microflora. As the sandstone-type uranium ore mining cost is relatively low leachable uranium deposit types, so their products become an important source of uranium. The study found that this type of uranium deposits are often accompanied by the formation of pyrite, so the formation of uranium deposits and deposits in the S, Fe geochemical cycle closely related.Objectives:By Shihongtan and Chaidamu different mining areas in the saprophytic microbes and related microbes involved in forming a preliminary study, explore the different characteristics of uranium deposits of microbial groups, understand the environment in different geological formations in the corresponding development of microbial flora in the situation, to further in-depth study of microbial mechanism of uranium mineralization in different uranium deposit.Approaches:To enrichment, isolation and identification the saprophytic microbes and microorganisms involved in mineralization related,which are in Shihongtan and Chaidamu different uranium deposits in the rock samples,by use of microbiological isolation, cultivation and identification methods. And their geochemical distribution is analyzed.Results:The existence of uranium deposits in the living micro-organisms, their species diversity, bacteria are the advantages of the two deposits, the ratio of the number and species of actinomyces and mould are less; bacillus bacteria in the different uranium deposits in many and widely distributed, this is characteristic of Bacillus bacteria closely related. The main microorganisms involved in mineralization in the distribution of uranium deposits in the uranium content, the organic carbon content, sulfur content, Fe+content, Fe3+content, dissolved oxygen, sulfate content in the control of such factors, showed different distributions in the two deposits characteristics. The species and the number of Sulfate-reducing bacteria and sampling depth, uranium content, organic carbon content of a relationship. Desulfotomaculum in the prevalence of the ore samples, indicating that Desulfotomaculum in particular the advantages of the two deposits. The number of iron bacteria in the high and low Fe2+content reflects the consistency. Sulfur bacteria in the large number of Shihongtan samples, sulfur content, Fe2+content and the number of sulfate-reducing bacteria are important factors in control the sulfur bacteria distribution.Conclusions:Saprophytic microorganism can be cultured in two different ore deposit samples showed a certain regularity, different uranium deposit in the main microorganisms involved in mineralization distribution showed different characteristics, ore deposits in the basis of microbes depends on the ecological diversity of microbial groups, microorganisms influence each other, each other's role in promoting the deposits in various geological elements of the cycle.The role of microorganisms on the formation of uranium deposits is of great significance.