 | Bankole, Olabode M., El Albani, Abderrazak, Meunier, Alain, Gauthier-Lafaye, François (2015) Textural and paleo-fluid flow control on diagenesis in the Paleoproterozoic Franceville Basin, South Eastern, Gabon. Precambrian Research, 268. 115-134 doi:10.1016/j.precamres.2015.07.008 | Journal (article/letter/editorial) | | Paleoproterozoic Franceville Basin, South Eastern, Gabon Olabode M. Bankole a,∗ , Abderrazak El Albani a...Basin Gabon a b s t r a c t The Paleoproterozoic (∼2.15 Ga) Franceville Basin, South Eastern Gabon, is...petrographic distinct generations of the precipitated illite and chlorite suggesting their precipitation from...equilibrium homogenous pore-fluid. The predominance of 1Mt illite polytype in most lithologies reflects precipitation...the main crystallized authigenic minerals aside illite and Fe-rich chlorite clay minerals. The mineralogical |  | | Journal (article/letter/editorial) | | micro-minerals bearing fission products in the Oklo and Bangombé natural reactors: A review of a natural analogue...migration of fission products H. Hidaka ∗ , M. Kikuchi Department of Earth and Planetary Systems Science, Hiroshima...Fission Rare earth elements (REE) Natural reactor Gabon Migration a b s t r a c t In the Precambrian, parts...the Oklo, Okélobondo and Bangombé uranium deposits of the Republic of Gabon, central Africa, functioned...fission reactors. Many elements in the Oklo and Bangombé uranium deposits show variations in isotopic composition |  | | Journal (article/letter/editorial) | | Review of In Situ Isotopic Studies of the Oklo and Bangombé Natural Fission Reactors Using Microbeam Analytical...Analytical Techniques Hiroshi Hidaka Department of Earth and Planetary Sciences, Nagoya University, Chikusa-ku...have been found in and around the Oklo and the Bangombé natural reactors. In the past two decades, microbeam...of various elements in and around the Oklo and Bangombé natural reactors vary significantly because of...review the isotopic results related to the Oklo and Bangombé reactors mainly based on my works using a sensitive |  | Dubois, Manon, Lopez, Michel, Orberger, Beate, Gay, Aurélien, Moussavou, Mathieu, Pambo, Florent, Rodrigues, Sophie (2017) The 2.1 Ga-old injectite network of the Franceville Basin, Gabon: Architecture, origin and implications on manganese mineralization. Precambrian Research, 302. 255-278 doi:10.1016/j.precamres.2017.09.022 | Journal (article/letter/editorial) | | 1Ga-old injectite network of the Franceville Basin, Gabon: Architecture, origin and implications on manganese...1Ga-old injectite network of the Franceville Basin, Gabon: Architecture, origin and implications on manganese...1Ga-old injectite network of the Franceville Basin, Gabon: Architecture, origin and implications on manganese... Franceville, Gabon e COMILOG SA- Société du groupe Eramet, B.P. 27-28 Moanda, Gabon Bulletin: Precambrian...drill-core sections in the 2.1-Gaold Franceville basin, Gabon, provide evidence for a large-scale injectite network |  | | Journal (article/letter/editorial) | | Kenji Horie a , Françoise Gauthier-Lafaye c a Department of Earth and Planetary Systems Science, Hiroshima...uptake into clay minerals from Pb isotopic analyses. Illite grains found in calcite veins included in sandstone...sandstone near the Oklo uranium deposit, Republic of Gabon, show extremely low 207Pb/206Pb (∼ 0.0158) isotopic...coexisting with illite indicate the formation age of each component, those of illite do not. In addition...addition, illite grains having low 207Pb/206Pb isotopic ratios contain a strongly large amount of Ba (1230 |  | Meisser, N., Brugger, J., Ansermet, S., Thelin, P., Bussy, F. (2010) Francoisite-(Ce), a new mineral species from La Creusaz uranium deposit (Valais, Switzerland) and from Radium Ridge (Flinders Ranges, South Australia): Description and genesis. American Mineralogist, 95 (10) 1527-1532 doi:10.2138/am.2010.3413 | Journal (article/letter/editorial) | | These waters reacted with uraninite, clinochlore, illite, calcite, and siderite to form a rich assemblage...Paralana Hot Springs (Brugger et al. 2005). The province contains many small Paleozoic hematite-U-CuNb-REE...from the oxidation zone of the Bangombé natural fission reactor, Gabon, by Janeczek and Ewing (1996)....RDC (Piret et al. 1988) Françoisite-(Ce), Bangombé, Gabon (Janeczek and Ewing 1996) Françoisite-(Ce)...and economic geology of the Mount Painter province. Department of Mines, Geological Survey of South Australia |  | Fayek, Mostafa, Utsunomiya, Satoshi, Ewing, Rodney C., Riciputi, Lee R., Jensen, Keld A. (2003) Oxygen isotopic composition of nano-scale uraninite at the Oklo-Okélobondo natural fission reactors, Gabon. American Mineralogist, 88 (10) 1583-1590 doi:10.2138/am-2003-1021 | Journal (article/letter/editorial) | | at the Oklo-Okélobondo natural fission reactors, Gabon MOSTAFA FAYEK,1,3,* SATOSHI UTSUNOMIYA,2 RODNEY...studying the evolution of the Oklo-Okélobondo and Bangombé U deposits. However, the post-criticality evolution...FRANCEVILLIAN URANIUM DEPOSITS, GABON, AFRICA The Oklo-Okélobondo and Bangombé U deposits are located in the...Franceville sedimentary basin in South Eastern Gabon (e.g., see Fig. 1 in Gauthier-Lafaye and Weber 1989;...to1 cm) and intermixed with various amounts of illite and chlorite (e.g., Jensen and Ewing 2001). At |  | | Journal (article/letter/editorial) | | recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon LENA Z. EVINS,1,* KELD A. JENSEN...Museum of Natural History, Stockholm, Sweden Department of Geological Sciences, University of Michigan...and Bangombé natural fossil fission reactors formed ca. 2 Ga ago in the Franceville basin, Gabon. The...from two reactor zones, RZ16 at Oklo and RZB at Bangombé, were studied to clarify the chronology and effect...loss from uraninite occurred at both Oklo and Bangombé during regional extension and the intrusion of |  | Ossa Ossa, Frantz, Hofmann, Axel, Vidal, Olivier, Kramers, Jan D., Agangi, Andrea, Belyanin, Georgy A., Mayaga-Mikolo, Francis (2014) Hydrothermal clay mineral formation in the uraniferous Paleoproterozoic FA Formation, Francevillian basin, Gabon. Precambrian Research, 246. 134-149 doi:10.1016/j.precamres.2014.03.003 | Journal (article/letter/editorial) | | Paleoproterozoic FA Formation, Francevillian basin, Gabon Frantz Ossa Ossa a,∗ , Axel Hofmann a , Olivier...Georgy A. Belyanin a , Francis Mayaga-Mikolo c a Department of Geology, University of Johannesburg, Auckland...Ministère de l’Industrie et des Mines, Libreville, Gabon b a r t i c l e i n f o Article history: Received...Formation of the Francevillian basin, south-east Gabon, which hosts high-grade U ore deposits associated...only known occurrence of natural nuclear reactors. Illite appears as the main clay phase in the lower fluvial |  | | 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...consist of high-grade uranium ore mantled by illite Department of Earth Sciences, University of Silesia...uL Bedzinska 60, PL-41-200 Sosnowiec, Poland Department of Earth and Planetary Sciences, University of...fran~oisite-(Nd) in quartz arenite from Bangomb6, Gabon. (A) BSE image of a grain of coffinite with a relic |  | | Journal (article/letter/editorial) | | Deditius ⁎, Satoshi Utsunomiya 1, Rodney C. Ewing Department of Geological Sciences, University of Michigan...Deditius). 1 Current address. Kyushu University, Department of Chemistry, Ropponmatsu, 4-2-1, Chuou-ku, Fukuoka-shi...with large amounts of associated minerals, such as illite, uraninite and REE-phosphates, which is often the...composition of coffinite is from the U-deposits in Oklo, Gabon (e.g., Janeczek, 1999; Jensen and Ewing, 2001; Bros...has been reported in the natural reactor in Bangombé, Gabon, suggesting that coffinite may play an important |  | | Journal (article/letter/editorial) | | University, New York (schlosser@ldeo.columbia.edu) 2 Department of Earth and Env. Engineering, Columbia Univ...(frank@erdw.ethz.ch) 2 University of Oxford, Department of Earth Sciences, Oxford OX1 3PR, U.K. 3 Laboratory...Uppsala, Sweden (goran.possnert@material.uu.se) 2 Department of Earth Sciences, Uppsala University, 752 36...ALDAHAN1, G. POSSNERT2, M. MEILI3 AND V. ALFIMOV2 1 Department of Earth Sciences, Uppsala University, 752 36...Palisades, NY 10964 (jcole@ldeo.columbia.edu) 2 Department of Geosciences, State University of New York |  | | Journal (article/letter/editorial) | | deposits and thereby determine long-term rates 1 Department of Geology, FCFM, Universidad de Chile Plaza...deposits occur in Australia. In the Hamersley province of Western Australia, there are channel iron deposits...famous ~2 billion-year-old Oklo uranium deposit (Gabon), considered a natural fission reactor, have provided...recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon. Geochimica et Cosmoschimica Acta...(U–Th)/ He analysis of supergene goethite, Hamersley Province, Australia. Geology 34:173-176 Hitzman MW, Reynolds |  | | Journal (article/letter/editorial) | | sandstones beneath a natural fission reactor at Bangombé, Gabon . . 685 STEFAN PROWATKE and STEPHAN KLEMME:...recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon . . . . . . . . . . . . . . ....of Eu(III)/Cm(III) on Camontmorillonite and Na-illite. Part 1: Batch sorption and time-resolved laser...of Eu(III)/Cm(III) on Ca-montmorillonite and Na-illite. Part 2: Surface complexation modelling . . . ...RICHARD L. HERVIG: Lithium and boron isotopes in illite-smectite: The importance of crystal size . . . |  | | Book | | spark; and George Dials, nuclear engineer and Department of Energy—Carlsbad Office manager, who cleared...geologic disposal of anthropogenic nuclear waste Department of Geography, David J. Mossman* Mount Allison...New South Wales 2006, Australia Ralf Briining Department of Physics, Mount Allison University, 67 York...geologic disposal sites. Indications are that at Oklo, Gabon, carbonaceous substances have combined to restrain...INTRODUCTION The Proterozoic Franceville Series of Gabon consists of a 1— 4-km-thick succession of mainly |  | | Report (issue) | | deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...21% and Zn 0.06% [25]. Gangue minerals include illite, kaolinite, chlorite, siderite, and calcite. Some...characterized by alteration haloes that contain illite, kaolinite, dravite, chlorite, euhedral quartz...isotope compositions of the alteration minerals (illite, chlorites and kaolinite) in conjunction with their...(Uzbekistan). • Tectonic-lithologic type — Mikouloungou (Gabon) and Mas Lavayre, Lodève district (France). • |  | | Journal (article/letter/editorial) | | 2. Proterozoic natural nuclear reactor in Oklo, Gabon (w2 Ga) The concept of natural nuclear fission reactions...uranium deposits of the Francevillian series in Gabon (Bodu et al., 1972; Neuilly et al., 1972). Since...reactor zones (RZs) have been found in the Oklo in Gabon, several of which are characterized in Table 2....core), which are mainly composed of chlorite or illite. The core is a thin layer with a thickness of 0...Mounana 60°E 30°N Oklo Okelobondo GABON 0° 30°S Bangombé Mikouloungou Formation FC-FE Formation |  | | Journal (article/letter/editorial) | | MISHRA1,* AND AIVELIAGARAM V. JEYAGOPAL2 1 2 Department of Geology and Geophysics, Indian Institute of...associated with uranium deposits in the Grenville province, Canada. Recent studies of secondary phases at...samples for this study belong to borehole #SMK–5. Department of Geology and Geophysics, at the Indian Institute...composition of the clay phase probably resembles that of illite and one representative analysis is presented in...through DST funding (IR/S4/ ESF-08/2005) to the Department of Geology and Geophysics, IIT Kharagpur. Saptarshi |  | Och, Lawrence M., Müller, Beat, Wichser, Adrian, Ulrich, Andrea, Vologina, Elena G., Sturm, Michael (2014) Rare earth elements in the sediments of Lake Baikal. Chemical Geology, 376. 61-75 doi:10.1016/j.chemgeo.2014.03.018 | Journal (article/letter/editorial) | | Baikal sediments mainly varies between smectite and illite with merely trace amounts of kaolinite, often within...overall higher cation exchange capacity (CEC) than illite due to its larger surface area (e.g. Macht et al...capacity of smectite is significantly higher than for illite (Aagaard, 1974; Bonnot-Courtois and Jaffrezic-Renault...information). Hence, as K is mainly associated with illite (e.g. Grim, 1962), it is plausible that the upward...enriched in smectite (see Fig. 11). Changes from illite-rich to smectite-rich sedimentary layers might |  | | Report (issue) | | CHAPTER 1: INTRODUCTION Kurt Kyser Department of Geological Sciences and Geological Engineering, Queen’s...Bay Basin in Canada and the Franceville Basin in Gabon, but at the boundary between sandstone and grey...the oldest deposits from the Franceville Basin in Gabon. Some of these latter deposits preserve the effects...ADMINISTRATION (2007): International Energy Outlook 2007. Department of Energy, Washington, D.C., www.eia.doe.gov/...EXPLORATION AND DISCOVERY OF DEPOSITS Kurt Kyser Department of Geological Sciences and Geological Engineering |  | Ling, Sixiang, Wu, Xiyong, Ren, Yong, Sun, Chunwei, Liao, Xin, Li, Xiaoning, Zhu, Baolong (2015) Geochemistry of trace and rare earth elements during weathering of black shale profiles in Northeast Chongqing, Southwestern China: Their mobilization, redistribution, and fractionation. Geochemistry, 75 (3) 403-417 doi:10.1016/j.chemer.2015.07.004 | Journal (article/letter/editorial) | | Southwest Jiaotong University, Chengdu, Sichuan Province 611756, PR China Moe Key Laboratory of High-speed...Southwest Jiaotong University, Chengdu, Sichuan Province 610031, PR China c School of Civil Engineering...University of Science and Technology, Mianyang, Sichuan Province 621010, PR China b a r t i c l e i n f o Article...Cambrian black shale in northeastern Chongqing Province, Southwestern China. In this small catchment,...exposure near Chengkou County, northeastern Chongqing Province, China. This site crosses the two first-level tectonic |  | | Journal (article/letter/editorial) | | Mikutta et al. (2009) GCA 73, 2034!2060. 1 Department of Chemistry, Michigan State University, East...(*correspondence: kalinich@chemisry.msu.edu) 2 Department of Geological Sciences, Michigan State University...University, East Lansing, MI 48824 3 Department of Materials Science and Engineering, Univeristy of Maryland...minerals EIGO KAMIISHI AND SATOSHI UTSUNOMIYA Department of Chemistry, Kyushu University, Fukuoka 8128581...Microbiology, D-28359 Bremen, Germany 2 Present address: Department of Geology, University of Maryland, College Park |  | | Report (issue) | | well-known Oklo sandstone-type uranium deposits of Gabon, which formed at ca. 2.1 Ga, are best explained...reactors in the Paleoproterozoic Franceville Basin (Gabon)..................................................38400 St. Martin d’Heres, France Allan J. Hall* Department of Archaeology, University of Glasgow, G12 8QQ...Greenstone Belts (3.8 to 2.7 Ga) N.V. Grassineau* Department of Geology, Royal Holloway, University of London...London, Egham, Surrey TW20 0EX, UK P. Abell† Department of Chemistry, University of Rhode Island, Kingston |  | | Book | | Resources of the Republic of South Africa by the Department of Mines and the Geological Survey of South Africa;...(amosite of the Transvaal; crocidolite of the Cape Province, South Africa). (4) Serpentinized dolomitic limestone...the north- these (Cilliers, 1964). ern Cape Province (Figure 3). South Africa is the world’s only important...Precambrian Transvaal Supergroup, Northern Cape Province The Transvaal Super-Group, exposed in a broad...Transvaal westward to the Orange River in Cape Province (Figure 3). Included is the Cape crocidolite field |  | Mathurin, Frédéric A., Åström, Mats E., Drake, Henrik, Maskenskaya, Olga M., Kalinowski, Birgitta E. (2014) REE and Y in groundwater in the upper 1.2 km of Proterozoic granitoids (Eastern Sweden) – Assessing the role of composition and origin of groundwaters, geochemistry of fractures, and organic/inorganic aqueous complexation. Geochimica et Cosmochimica Acta, 144. 342-378 doi:10.1016/j.gca.2014.08.004 | Journal (article/letter/editorial) | | 2009). Pyrite, clay minerals (i.e., smectite and illite) and epidote are more abundant in the fractures...(2014). Ground water colloid properties from the Bangombé system. Appl. Geochem. 45, 130-143. Dia, A., Gruau |
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