 | | Journal (article/letter/editorial) | | EOA3CO,Canada 21aboratory of Organic Geochemistry, Department of Geosciences, The University of Arizona, Tucson...kerogen and solid bitumen as it is in many of the Oklo uranium deposits and in the Witwatersrand gold-uranium...to the 3 Ga old Witwatersrand and the 2.1 Ga old Oklo ore deposits. They have been regionally metamorphosed...uranium ores and natural fission reactors of Oklo, Republic of Gabon. Twenty-five maximum and minimum reflectance...some of the organic matter in the vicinity of the Oklo natural fission reactors ( NAGY et al., 199 1). |  | | Journal (article/letter/editorial) | | radiolysis on local redox conditions in the Oklo, Gabon, natural fission reactors 10 and 16 CREGU VI~RONIQIJE...significantly modify the local redox conditions. The Oklo natural fission zones are good examples where the...claimed that, in the conditions of the operating Oklo reactors, there had been the same recombination...matter was not considered in these calculations. The Oklo nuclear fission zones are excellent sites for studying...spectroscopy. r c Libreville c GABON 1 t r Q 500 m i OKLO \ - ’ _,.., . . . 6 Manganese 0 |  | | Journal (article/letter/editorial) | | Ma ago. The model explaining the formation of the Oklo uranium deposits suggests that at the time of sediment...Paleoproterozoic; Uranium; Manganese; Atmosphere; Oklo; Gabon; Carbon isotopes; Black shales 1. Introduction...Introduction The natural nuclear fission reactors in Gabon are unique. The possibility that nuclear fission reactions...occur 2.0 Ga ago in the Oklo uranium deposit of the Francevillian Series, Gabon (Neuilly et al., 1972)...in the Paleoproterozoic uranium ore deposits of Gabon. This observation raises the question whether this |  | | Book | | spark; and George Dials, nuclear engineer and Department of Energy—Carlsbad Office manager, who cleared... Pe Pee ee Vii 1. Carbonaceous substances in Oklo reactors—Analogue for permanent deep geologic disposal...31 Geological characterization of the Asse salt mine for mining, disposal of radioactive waste, ANI ...the German Konrad repository in a former iron ore mine for radioactive waste generating no to negligible...Engineering Geology XIX 2008 Carbonaceous substances in Oklo reactors—Analogue for permanent deep geologic disposal |  | | Report (issue) | | ........................ 66 2.14.3. By-product–copper processing ......................................deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...breccias and contain uranium in association with copper, gold, silver and rare earths. The main representative...(Namibia), the uranium occurrences in the porphyry copper deposits such as Bingham Canyon and Twin Butte...activities include drilling and coring to complete final mine plans and establish final processing flowsheets |  | | Journal (article/letter/editorial) | | Through the process known as acid rock drainage (or mine drainage), the oxidative dissolution is in this...complex outer layer of of sulfides from ores and from mine wastes can release air, water, biota, organic matter...supergene oxidation and leaching of ore deposits and mine wastes. They have a profound effect on high pressures...geochronologic studies. For overall viability of the mine. This has been the case since example, one could...deposits and thereby determine long-term rates 1 Department of Geology, FCFM, Universidad de Chile Plaza |  | | Report (issue) | | DepositsProgram and Abstracts Konstantin graphite mine, Velke Vrbno, Czechoslovakia. Graphite is hosted...2 54 U.S. GEOLOGICAL SURVEY Cl RCULAR 1037 DEPARTMENT OF THE INTERIOR MANUEL LUJAN, JR., Secretary...Witwatersrand, South Africa; Elliot Lake, Canada; and Oklo, Gabon Bartholomew Nagy VIII PROGRAM OF LECTURES...Deposits By E.S. Ho, R.M. Kettler, and P.A. Meyers, Department of Geological Sciences, University of Michigan...abundance of orgamc matter and metal (for example, copper, gold, silver) ores at these sites imply that geochemical |  | Dymkov, Y., Holliger, P., Pagel, M., Gorshkov, A., Artyukhina, A. (1997) Characterization of a La-Ce-Sr-Ca aluminous hydroxy phosphate in nuclear zone 13 in the Oklo uranium deposit (Gabon) Mineralium Deposita, 32 (6) 617-620 doi:10.1007/s001260050127 | Journal (article/letter/editorial) | | phosphate in nuclear zone 13 in the Oklo uranium deposit (Gabon) Abstract A La-Ce-Sr-Ca aluminous hydroxy...in the nuclear reactor zone 13 in the Oklo uranium deposit (Gabon). It has a trigonal elementary cell with...(Ruenach 1979; Holliger 1992) in the Oklo uranium deposit (Gabon) at the southwestern border of the Precambrian...or Fe and X by S, P or As. Sequence of events at Oklo The Franvellian series, which have been divided...Ma. A dolerite dike which presently crosscuts the Oklo quarry, intruded the sandstones at 0.98 Ga, an age |  | | Journal (article/letter/editorial) | | beneath a natural fission reactor at Bangomb6, Gabon JANUSZ JANECZEK RODNEY EWING SPONTANEOUS fission...reactions occurred in several uranium deposits in SE Gabon approximately two billion years ago. The reactor...of high-grade uranium ore mantled by illite Department of Earth Sciences, University of Silesia, uL...uL Bedzinska 60, PL-41-200 Sosnowiec, Poland Department of Earth and Planetary Sciences, University of...fission reactor at Bangomb6 (20 km south of the Oklo uranium deposit), we have found several grains of |  | | Journal (article/letter/editorial) | | graphitic carbonaceous matter at the Oklo natural fission reactors, Gabon MARK J. RIGALI and BARTHOLOMEWNAGY*...BARTHOLOMEWNAGY* Laboratory of Organic Geochemistry, Department of Geosciences, The University of Arizona, Tucson...help characterize the evolution and behavior of the Oklo carbonaceous matter. Such information is necessary...solidification, and radionuclide containment at Oklo. In the Oklo ore deposits and natural fission reactors...radionuclide containment in the reactors. Hence, the Oklo natural fission reactors are currently the subjects |  | | Report (issue) | | National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please include...Correlation Program Project 2 54 Frontispiece: Nickel-copper-zinc-mineralized, Proterozoic (1 .96-2.00 Ga) black... U.S. GEOLOGICAL SURVEY CIRCULAR 1058 U.S. DEPARTMENT OF THE INTERIOR MANUEL LUJAN, JR., Secretary...investigations of a natural reactor and its environs at Oklo, Gabon-A preliminary report, by Bartholomew Nagy, Joel...Sucha Rudna in Czechoslovakia. In the Nevada gold province, auriferous Paleozoic black shales are part of |  | | Journal (article/letter/editorial) | | NoirsLimoazat, Forez, France Margnac and Fanay, France Oklo, Gabon, Africa ChateauLambert, S.Vosges, France Ceara...Canning, Owl Creek Mountains, Wyoming, USA Ukraine Oklo, Gabon, Africa Northern Arizona, USA Mary Kathleen,...Colorado, USA Cottonwood Wash, Utah, USA Oklo, Gabon, Africa Oklo, Gabon, Africa Rabbit Lake, Saskatchewan,...Australia Akouta, Nigeria, Africa Lodeve, France Oklo, Gabon, Africa Coronation Hill, Australia Capitan Mountains...[42] Bernardan, France U 54–360 – – [43] Oklo, Gabon, Africa U 160–468 – 0.2–17.8 [44] Marysvale |  | | Journal (article/letter/editorial) | | formational redox boundary at about 2.0 Ga in the Oklo area of Gabon. All known economically significant uranium...Central Asia province including Kazakhstan and Uzbekistan, the second largest uranium province of the world...quartz pebble conglomerates; IOCG = iron oxide-copper-gold, mainly represented by Olympic Dam; black...0361-0128/98/000/000-00 $6.00 orogen: Rössing and the Shaba province. However these types of deposits are not specific... Kola Metamorphism 1.5 Unconformity related Oklo Paleoproterozoic passive margins sediments lism |  | | Journal (article/letter/editorial) | | italics; book reviews are placed at the end. Acid-mine drainage (AMD), relationships of soluble, suspended...assemblage from the Tertiary Barrington volcanic province, New South Wales, 623; no61bensonite a new BaMn...silicate of the lawsonite structure type, from Woods mine, New South Wales, 369; solid solution and composi-...mineral of the lawsonite structure type, from Woods mine, New South Wales, Australia, 369 BARKOV.A., 973...973 BARRETT,J., 821 Barrington volcanic province, an unusual rubysapphire-sapphirine-spinel assemblage from |  | | Journal (article/letter/editorial) | | SASKATCHEWAN, CANADA P. ALEXANDRE† AND T. K. KYSER Department of Geological Sciences and Geological Engineering...elsewhere (e.g., the “natural fission reactors” at Oklo, Gabon: Mossman et al., 1993a; in uranium occurrences...Cree Lake mobile zone, situated between the Rae province and the Trans-Hudson orogen (Lewry and Sibbald...spherulitic dravite, as well as rutile, pyrite, and copper and nickel sulfides were introduced during a late...bitumen by the protective coating of bitumen (cf. Oklo and Elliot Lake uranium deposits: Nagy et al., 1991) |  | | Journal (article/letter/editorial) | | metal release and transport in flooded pre-oxidized mine tailings—Paul H. Simms, Ernest K. Yanful, Lue St-Arnaud...geochemistry of a reactive barrier for treatment of mine drainage—Roger B. Herbert, Jr., Shawn G. Benner...Vol. 38, No. 7, 2000 Geology of Owl Creek gold mine, Timmins, Ontario—P.R. Coad, D.I. Brisbin, R.J....geological environment of the Oklo natural reactor zones, Franceville basin, Gabon—Michel Cuney and Régis Mathieu...in the hydrogeochemistry and microbiology of acid mine waters—D. Kirk Nordstrom 1368 499 1369 INTERESTING |  | | Journal (article/letter/editorial) | | Implications for the environmental management of mine sites— M.W. Clark, S.R. Walsh, and J.V. Smith APPLIED...Ni-Cu mineralization at Las Aguilas, San Luis Province, Argentina: Implications for exploration of an...arc—R.G. Skirrow and J.P. Sims The Vazante zinc mine, Minas Gerais, Brazil: Constraints on willemitic...Implications for Andean tectonics and porphyry copper metallogenesis—V. Maksaev and M. Zentilli Ore deposits...distribution in BIF-derived iron ores of Hamersley Province, Western Australia—R.D. Dukino, B.M. England, |  | | Report (volume) | | Editors: Peter C. Burns' & Robert Finch 2 1 Department of Civil Engineering and Geological Sciences...Environmental issues such as coping with uranium mine and mill tailings and other uranium-contaminated...and Geochemistry of Natural Fission Reactors in Gabon Janusz Janeczek 8 393 Geomicrobiology of Uranium...and Geochemistry of Natural Fission Reactors in Gabon Janusz Janeczek INTRODUCTION: NATURAL FISSION REACTORS...largest construction projects in the history of the Department of Energy. Approximately three billion dollars |  | Kirchenbaur, Maria, Maas, Roland, Ehrig, Kathy, Kamenetsky, Vadim S., Strub, Erik, Ballhaus, Chris, Münker, Carsten (2016) Uranium and Sm isotope studies of the supergiant Olympic Dam Cu–Au–U–Ag deposit, South Australia. Geochimica et Cosmochimica Acta, 180. 15-32 doi:10.1016/j.gca.2016.01.035 | Journal (article/letter/editorial) | | Australia) is a type example of the iron oxide-copper-gold (IOCG) spectrum of deposits and one of the...within a granite of the 1.59 Ga Gawler Silicic Province. Emerging evidence indicates that both the breccia..., 2012) is classified as an IOCG (iron oxide – copper – gold) deposit, a class of ore deposits with examples...and Weber, 2003), of the type discovered at the Oklo uranium deposit (e.g., Naudet, 1974; Gauthier-Lafaye...volume of the Mesoproterozoic silicic large igneous province (SLIP) magmas of the Gawler Craton (late Archean |  | Alexandre, Paul, Kyser, Kurt, Layton-Matthews, Daniel, Joy, Brian, Uvarova, Yulia (2015) Chemical Compositions of Natural Uraninite. The Canadian Mineralogist, 53 (4) 595-622 doi:10.3749/canmin.1500017 | Journal (article/letter/editorial) | | KYSER, DANIEL LAYTON-MATTHEWS, AND BRIAN JOY Department of Geological Sciences, Queen’s University, Kingston...deposits that are not represented here are Iron Oxide Copper Gold (IOCG; the only U-producing example of which...basement-hosted deposits (simple type). The Oklo deposit in Gabon has also been classified as unconformity-related...Nun Lake, Lake Athabasca, Port Radium, Hab Mine, Ace Mine (Saskatchewan, Canada); 4: Eagle Point, McArthur...Bay, Camray Mine, Ranwick Mine (Ontario, Canada); 7: Camie River (Quebec, Canada); 8: Ike Mine, Happy Jack |  | | Book | | ........................................... 36 Gabon ..................................................uranium if higher prices justify reprocessing the mine tailings to recover some of the uranium that was...wastewater during environmental reclamation at a mine that has ceased production. The following statistical...was about 270 tU. In Argentina the Sierra Pintada mine had been in standby status since 1999 and was expected...recovered from mine rehabilitation activities; small amounts were likewise recovered during mine remediation |  | | Journal (article/letter/editorial) | | transport through two mixing zones affected by acid mine drainage near Silverton, Colorado— Laurence E. Schemel...deposit of the Shuikoushan mineral district, Hunan Province, China— Nanshi Zeng, E. Izawa, Y. Motomura, and...101 Complexly zoned fibrous tourmaline, Cruzeiro mine, Minas Gerais, Brazil: A record of evolving magmatic...Evidence for a Cambrian diamondiferous alkaline province in northeastern North America—Stéphane Digonnet...and remedial measures at the Troya abandoned Pb-Zn mine (The Basque Country, Northern Spain) —V. Iribar |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PRINCIPAL URANIUM DEPOSITS OF THE WORLD ...Angola, Peoples Republic of........................ Gabon, Republic of................................. Central...age", were found by accident in the search for copper in the Belgian Congo, for cobalt and silver in...Saskatchewan, Canada; the Shinkolobwe, Katanga Province, Zafre; and the medium-sized deposits at Joachymov...Joachymov, Czechoslovakia, and at Schwartzwalder mine, Colorado, U.S.A.). Uranium deposits have been found |  | | Journal (article/letter/editorial) | | around the Oklo–Okélobondo and Bangombé natural nuclear reaction zones (Franceville basin, Gabon)—Régis Mathieu...at the Zenith deposit, Southwestern Grenville Province, Renfrew area, Ontario, Canada—S. Salvi 77 CONTRIBUTIONS...Kislyakov and V.N. Shchetochkin The Dzhinchuan copper-nickel deposit in China, and the relation of the...V.I. Kazansky, and N.V. Sharov On the porphyry copper mineralization in the southeastern Transbaikal...Canada, to delineate structures hosting porphyry copper deposits—Baishali Roy and Ron M. Clowes 1418 Vol |  | | Journal (article/letter/editorial) | | studies of the Chinkuashih high-sulfidation gold–copper deposits in Taiwan Y. Wang, M. Sasaki, M. Sasada...TcrRu fractionation in the Oklo and Bangombe´ natural fission reactors, Gabon H. Hidaka, P. Holliger and...151 171 191 209 231 304 Precise analysis of copper and zinc isotopic compositions by plasma-source...the Dachang Sn-polymetallic ore deposit, Guangxi Province, P.R. China S.-Y. Jiang, F. Han, J.-Z. Shen and...DiÕider Page Hydrothermal and supergene clays of the Oklo natural reactors: conditions of radionuclide release |
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