Search for a command to run...
Research Article| June 01, 2015 The Multiple Roles of Sulfate-Reducing Bacteria and Fe-Ti Oxides in the Genesis of the Bayinwula Roll Front-Type Uranium Deposit, Erlian Basin, NE China* Christophe Bonnetti; Christophe Bonnetti † 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France †Corresponding author: e-mail, christoph.bonnetti@gmail.com Search for other works by this author on: GSW Google Scholar Michel Cuney; Michel Cuney 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Search for other works by this author on: GSW Google Scholar Raymond Michels; Raymond Michels 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Search for other works by this author on: GSW Google Scholar Laurent Truche; Laurent Truche 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Search for other works by this author on: GSW Google Scholar Fabrice Malartre; Fabrice Malartre 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Search for other works by this author on: GSW Google Scholar Xiaodong Liu; Xiaodong Liu 2East China Institute of Technology, 56 Xuefu Road, Linchan, 344000 Fuzhou, Jiangxi, China Search for other works by this author on: GSW Google Scholar Jianxing Yang Jianxing Yang 3Geological Team No. 208, Bureau of Geology, Chinese National Nuclear Corporation, Baotou, Inner Mongolia, China Search for other works by this author on: GSW Google Scholar Author and Article Information Christophe Bonnetti † 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Michel Cuney 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Raymond Michels 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Laurent Truche 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Fabrice Malartre 1Université de Lorraine, GeoRessources-Centre National de la Recherche Scientifique-Centre de recherche sur la géologie des matières premières minerales et énergétiques, BP239, F54506 Vandoeuvre-lès-Nancy, France Xiaodong Liu 2East China Institute of Technology, 56 Xuefu Road, Linchan, 344000 Fuzhou, Jiangxi, China Jianxing Yang 3Geological Team No. 208, Bureau of Geology, Chinese National Nuclear Corporation, Baotou, Inner Mongolia, China †Corresponding author: e-mail, christoph.bonnetti@gmail.com Publisher: Society of Economic Geologists Received: 30 Apr 2014 Accepted: 02 Nov 2014 First Online: 09 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 © 2015 Society of Economic Geologists. Economic Geology (2015) 110 (4): 1059–1081. https://doi.org/10.2113/econgeo.110.4.1059 Article history Received: 30 Apr 2014 Accepted: 02 Nov 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Christophe Bonnetti, Michel Cuney, Raymond Michels, Laurent Truche, Fabrice Malartre, Xiaodong Liu, Jianxing Yang; The Multiple Roles of Sulfate-Reducing Bacteria and Fe-Ti Oxides in the Genesis of the Bayinwula Roll Front-Type Uranium Deposit, Erlian Basin, NE China. Economic Geology 2015;; 110 (4): 1059–1081. doi: https://doi.org/10.2113/econgeo.110.4.1059 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEconomic Geology Search Advanced Search Abstract The Bayinwula roll front-type uranium deposit is hosted in sandstones of the Early Cretaceous Saihan Formation deposited during the postrift stage of the Erlian basin, in northeast China. The present study aims to characterize: (1) the roles of sulfate-reducing bacteria and (2) the roles of Fe-Ti oxides in the genesis of the Bayinwula deposit. Drill cores of the host sandstone have been investigated with emphasis on petrographic observations, whole-rock geochemistry, and geochemical and/or mineralogical study of Fe-Ti oxides, iron disulfide, uranium minerals (EMP, LA-ICPMS), and organic matter (rock-eval pyrolysis). The δ34S value has been measured in situ by SIMS on the different generations of iron disulfide.Within regional sandstones, preore uranium enrichment (Umean = 30.4 ppm in whole rock) was identified on altered Fe-Ti oxides (38.5% of the whole-rock U content) and constitutes a major source of uranium for the mineralization. Petrographic observations and rock-eval data indicate that organic matter occurring in the host sandstone is mainly inherited from land plants and corresponds to type III or type IV kerogens. Organic matter fragments disseminated in sandstones may also contain significant preore uranium concentration. Framboidal and collomorph ore-stage iron disulfides have moderate to high concentrations of As, Ni, and Co and have a light sulfur isotope signature characterized by δ34S values from −30.5 to −7.5‰, suggesting that sulfur originated from bacterial sulfate reduction, which was mainly responsible for (1) the liberation of U from Fe-Ti oxides and organic matter, (2) the generation of ore-stage iron disulfides, and (3) the production of a secondary H2S-rich reducing barrier involved in the reduction of U(VI) and the precipitation of U(IV). Uranyl and sulfate ions were transported through the host sandstone by low-temperature oxygenated groundwater and U(IV) was precipitated at the redox front as P-rich coffinite and ningyoite, dominantly as replacement of ore-stage iron disulfides which have partly to totally replaced organic matter and Fe-Ti oxides. Therefore, the combined mineralogical, geochemical, and isotopic characteristics of the Bayinwula roll-front uranium deposit support the theory that biogenic processes have widely contributed to the genesis of the uranium mineralization. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.