 | | Journal (article/letter/editorial) | | Strel’tsovskoe deposit, Transbaikalia, Russia (d—sphalerite, e—fluorite, f—barite, Th = 184°C (d), 150°C...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 |  | | 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 |  | | 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...StatePreliminary Results By Timothy W. Lyons, Department of Geology and Geophysics, Yale University, New |  | | Journal (article/letter/editorial) | | os de Caldas, Cigar Lake, Maqarin, El Berrocal, Oklo and Palmottu. To make this comparison meaningful...primary uranium mineralisations (Enresa, 1996); Oklo (Gabon), a fossil natural nuclear reactor systems located...carried out to date. For example, the studies at Oklo and Palmottu were completed only during 1999. Consequently...BPM exercises, from the Pocß os de Caldas to the Oklo and Palmottu projects, has not varied significantly...(Spain), CSIC (Spain) and MBT/QuantiSci (Spain). Oklo: CEA (France), Ciemat (Spain), CNRS (France), CSIC |  | Rantzsch, Ulrike, Gauert, Christoph D. K., Van der Westhuizen, Willem A., Duhamel, Isabelle, Cuney, Michel, Beukes, Gerhard J. (2011) Mineral chemical study of U-bearing minerals from the Dominion Reefs, South Africa. Mineralium Deposita, 46 (2) 187-196 doi:10.1007/s00126-010-0317-4 | Journal (article/letter/editorial) | | (*) : W. A. Van der Westhuizen : G. J. Beukes Department of Geology, University of the Free State, P.O...and Upper Reef) were mined underground at Rietkuil Mine by Uranium One Africa Ltd from 2006 to 2008. The...a 700–800 m thick volcanosedimentary unit in the mine area (Fig. 2), underlies the Witwatersrand Supergroup...pyrrhotite of sample 5510. c Microphotographs of sphalerite, chalcopyrite, galena, Ni–Co–sulfarsenide and...Chromite Magnetite Pyrite Galena Arsenopyrite Sphalerite Chalcopyrite Pyrrhotite Garnet Quartz Sericite |  | | Journal (article/letter/editorial) | | recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon LENA Z. EVINS,1,* KELD A....Museum of Natural History, Stockholm, Sweden Department of Geological Sciences, University of Michigan...accepted in revised form July 19, 2004) Abstract—The Oklo and Bangombé natural fossil fission reactors formed...formed ca. 2 Ga ago in the Franceville basin, Gabon. The response of uraninite in the natural reactors...Uraninite and galena from two reactor zones, RZ16 at Oklo and RZB at Bangombé, were studied to clarify the |  | | Journal (article/letter/editorial) | | Deditius, Satoshi Utsunomiya, Rodney C. Ewing * Department of Geological Sciences, University of Michigan...been described in sedimentary U-deposits at Oklo, Gabon, and unconformable U-deposits within Athabasca...of As in uraninite from the widely cited Nopal I mine (Janeczek et al., 1996; Finch and Murakami, 1999)...Rocky Mountain and Intermountain Basin Uranium Province, USA (Dahlkamp, 1993; Finch, 1996) (Fig. 1). The...different ages for the rock units at the Lookout Mine: 94, 99, and 203 Ma using the U–Pb method, and suggested |  | | Journal (article/letter/editorial) | | Implications for the environmental management of mine sites— M.W. Clark, S.R. Walsh, and J.V. Smith APPLIED...Men’Shikov Acicular sphalerite enriched in Ag, Sb, and Cu embedded within color-banded sphalerite from the Kokanee...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...distribution in BIF-derived iron ores of Hamersley Province, Western Australia—R.D. Dukino, B.M. England, |  | | Report (issue) | | National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please include... 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... deposits near Songlin, Zunyi County, Guizhou Province, in the People's Republic of China have been mined |  | 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) | | within a granite of the 1.59 Ga Gawler Silicic Province. Emerging evidence indicates that both the breccia...and Weber, 2003), of the type discovered at the Oklo uranium deposit (e.g., Naudet, 1974; Gauthier-Lafaye...digenite, djurelite), with lesser amounts of sphalerite, tennantite, molybdenite, and galena. They are...alteration, (2) siderite → fluorite → barite, (3) sphalerite→ galena → pyrite → chalcopyrite → bornite → chalcocite..., pyrite, chalcopyrite, bornite, chalcocite, sphalerite, galena, uraninite, coffinite, brannerite). Sample |  | | 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) | | deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...activities include drilling and coring to complete final mine plans and establish final processing flowsheets...case of an underground mine or overburden stripping in the case of an open pit mine, mill construction,...direction and dips south at 15–30º. In the Main Mine Series the ore zone is up to 35m thick. Jabiluka...open to the south and east at depth. In the Main Mine Series the ore zones are up to 135m thick. The metasedimentary |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PRINCIPAL URANIUM DEPOSITS OF THE WORLD ...Angola, Peoples Republic of........................ Gabon, Republic of................................. Central...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...Australi a Sweden Spain France Ni ger Argenti na India Gabon Al geri a Yugoslavia Brazil Central African Republic |  | Škácha, P., Goliáš, V., Sejkora, J., Plášil, J., Strnad, L., Škoda, R., Ježek, J. (2009) Hydrothermal uranium-base metal mineralization of the Jánská vein, Březové Hory, Příbram, Czech Republic: lead isotopes and chemical dating of uraninite. Journal of GEOsciences, 54 (1) 1-13 | Journal (article/letter/editorial) | | 43 Prague 2, Czech Republic; skachap@volny.cz Department of Mineralogy and Petrology, National Museum...Main ore minerals are represented by galena, sphalerite, silver ores, pyrite and uraninite (Fig. 2)....not contain silver. Galena II is younger than sphalerite and coats its fragments. Both minerals are in...the Jánská vein in reflected light. Light gray sphalerite is overgrown by white galena. Both phases are...uranium mineralization at the 2nd level of the Prokop mine. Calcite is a common mineral in the museum specimens |  | | Journal (issue) | | Jianghshan, Guangdong Province. I have seen others listed as coming from Hebei Province. Regardless of where...4 Fig. 1. Apophyllite, Jianghshan, Guangdong Province, China, photo by Dan Weinrich. neat piece. To...the old classic locality, Morgabal, in Aveyron Department, France. Also, he had small trays holding small...stibnites from a new Nevada locality, the Murray Mine, not the old Manhattan, but he had only three specimens...clear calcites from a small pocket in the Meikle Mine, the new locality for the superb yellow barites |  | | Journal (article/letter/editorial) | | Near-Surface Environments HEINRICH D. HOLLAND† Department of Earth and Planetary Sciences, Harvard University...has been more usefully applied to exploration and mine development in the Witwaterstrand basin than the... The giant iron ore deposits of the Hamersley province, Australia, are alteration products of BIF. The...the large hydrothermal uranium ores, those at Oklo, in Gabon, were formed 2,000 ± 50 Ma (i.e. close to the...McArthur basin, Australia, 1.6 Ga. B. Finland and Gabon, 2.0 to 2.15 Ga. C. Ventersdorp Group, South Africa |  | | Journal (article/letter/editorial) | | Mina,b,*, Changquan Fanga, Mostafa Fayekc a Department of Earth Sciences, State Key Laboratory of Mineral...Nanjing 210093, People’s Republic of China c Department of Earth and Planetary Sciences, University of...with the bbull’s-eyeQ aggregates are marcasite, sphalerite, galena, chalcopyrite, bornite, clausthalite...China 1. Introduction * Corresponding author. Department of Earth Sciences, State Key Laboratory of Mineral...deposits. The district is located in the Jiangxi Province, SE China, and is one of the most economically |  | | Report (issue) | | Gauthier-Lafaye shows that the well-known Oklo sandstone-type uranium deposits of Gabon, which formed at ca. 2.1 Ga...post-depositional processes in uranium ores at the Stanleigh mine, Elliot Lake, Ontario, Canada.....................reactors in the Paleoproterozoic Franceville Basin (Gabon)..................................................38400 St. Martin d’Heres, France Allan J. Hall* Department of Archaeology, University of Glasgow, G12 8QQ...botryoids at a 350 Ma fossil warm spring at the Tynagh mine, Ireland: (A) The top surface (field of view measures |  | Essarraj, Samira, Boiron, Marie-Christine, Cathelineau, Michel, Tarantola, Alexandre, Leisen, Mathieu, Boulvais, Philippe, Maacha, Lhou (2016) Basinal Brines at the Origin of the Imiter Ag-Hg Deposit (Anti-Atlas, Morocco): Evidence from LA-ICP-MS Data on Fluid Inclusions, Halogen Signatures, and Stable Isotopes (H, C, O) Economic Geology, 111 (7) 1753-1781 doi:10.2113/econgeo.111.7.1753 | Journal (article/letter/editorial) | | structures Fig. 2. (a). Local geology of the Imiter mine, from Tuduri et al., (2005) and SMI documents. (b)...(b). North-south geologic section on the Imiter mine (a-a' bold line in the studied area, SMI document)...of apparent pull-apart geometries at the map and mine work scales (Ouguir et al., 1994; Tuduri et al....corroded and partially replaced by minerals such as sphalerite, galena, and Ag minerals from later stages (Fig...both are crosscut by late dolomite). Dark brown sphalerite I (Fig. 6g, i) and galena are associated with |  | | 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 |  | | 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...Carbonate-mineral/water interactions in sulfide-rich mine tailings— Tom A. Al, Chris J. Martin, and David... Application of 3-D seismic to mine planning at Vaal Reef’s gold mine, number 10 shaft, Republic of South...Outokumpu Group—Aimo Hattula and Timo Rekola In-mine seismic delineation of mineralization and rock structure— |  | | Journal (article/letter/editorial) | | c Environmental Science and Waste Management Department, Edifici B2, Campus Nord, Universitat Politecnica...facades by acid rain, and the neutralisation of acid mine waste waters. Alkattan et al. (2002) experimentally...dissolution rate of pyrite sludge from the Aznalcóllar mine in Southwest Spain, at 22 jC and pH 2.5 – 4.7. Pyrite...chalcopyrite dissolved at similar rates, whereas sphalerite dissolved faster. They propose that the rate-limiting...April 1998, the tailing dam of the Aznalcóllar mine, 25 km NW of Sevilla, Spain, collapsed and the valleys |  | | Journal (article/letter/editorial) | | U-bearing minerals from the Vale de Abrutiga uranium mine area, Central Portugal Marina M. S. Cabral Pinto...uranium phosphates from Vale de Abrutiga uranium mine and Pinto et al. (2004) studied the pollution associated...U-bearing phases from the Vale de Abrutiga uranium mine, which occurs close to the contact with a Variscan...and geological map of the Vale de Abrutiga uranium mine. Modified from ENU (Internal Report). Geochemistry...using a Jeol electron-microprobe JX8600 at the Department of Earth Sciences, University of Bristol, U.K |  | | 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 |  | | Book | | (individual deposit) and regional scale (uranium province). Their ideas, observations, and data have directly...Granite-Related Vein Uranium Deposits: Schwartzwalder Mine, Front Range, USA ................................Uranium Deposits: Shinkolobwe, Katanga Copper Province, Zaire .........................................Deposits in Proterozoic Sandstones: Franceville Basin, Gabon ......................... 224 232 237 246 250 250...when analyzing pitchblende from the George Wagsfort mine at Johanngeorgenstadt, Sachsisches Erzgebirge (Saxonian |
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