 | Deditius, A. P., Utsunomiya, S., Wall, M. A., Pointeau, V., Ewing, R. C. (2009) Crystal chemistry and radiation-induced amorphization of P-coffinite from the natural fission reactor at Bangombe, Gabon. American Mineralogist, 94 (5) 827-837 doi:10.2138/am.2009.3114 | Journal (article/letter/editorial) | | P-coffinite from the natural fission reactor at Bangombé, Gabon Artur P. DeDitius,1,* sAtoshi utsunomiyA,2...1 Véronique PointeAu,3 AnD roDney C. ewing1 1 Department of Geological Sciences, University of Michigan...Michigan, Ann Arbor, Michigan 48109-1005, U.S.A. Department of Chemistry, Kyushu University, Ropponmatsu, 4-2-1...P)O4·H2O, from the natural nuclear reactor at Bangombé, Gabon (depth 12.25 m), has been examined as an important...coffinite, uraninite, natural fission reactor, Bangombé introDuCtion Janeczek and Ewing (1996) first |  | | Journal (article/letter/editorial) | | Technology, Rechbauerstrasse 12, 8010 Graz, Austria Department of Earth and Environmental Sciences, University...Arbor, Michigan 48109-1005, U.S.A. Abstract U-thorite, (Th,U)SiO4, from Ambohijatrova Masindray, Madagascar...electron microprobe analyses reveal two types of U-thorite: (i) large (about 1 cm), orange, amorphous grains...01Si1.00±0.01; and (ii) green, microcrystalline U-thorite with composition: (Th0.76±0.05 U0.08±0.01Ca0.07±0...005REE0.009±0.001)0.92±0.07Si1.12±0.06. Ca-free U-thorite-(i) is enriched in Th, U, and Pb (7.1, 1.2, and |  | | 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...solid solutions between: coffinite–zircon (ZrSiO4)–thorite (ThSiO4)– xenotime (YPO4)–ningyoite UCa(PO4)2·1–2H2O...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 |  | 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...Franceville Basin (Fig. 1), located in south-eastern Gabon, represents one of the world oldest petroleum systems...Regional geological map of Franceville Basin in Gabon (Ossa et al., 2013) that shows location of the study...Lastoursvilles, and Okonja basins in the South Eastern Gabon (Gauthier-Lafaye and Weber, 1989, 2003; Gauthier-Lafaye |  | 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) | | 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)....assemblage of allanite-(Ce), fluorapatite, and thorite, resulting from the metamorphic destabilization...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 |  | 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) | | Editorial handling: R. Milke C. J. Hetherington (*) Department of Geosciences, Texas Tech University, Box 41053...be partitioned into xenotime as the tetragonal thorite [ThSiO4] component, also via a coupled substitution:...euhedral xenotime crystal from the Northwest Frontier Province (NWFP), Pakistan, measuring approximately 1 cm...partial charge of the A-site is balanced by the thorite/coffinite exchange (Förster 1998, 2006; Hetherington...Kangankunde carbonatite complex in the Chilwa Alkaline Province, southern Malawi (Garson and Campbell-Smith 1965; |  | | Journal (article/letter/editorial) | | Potsdam, Germany Martin ONDREJKA and Pavel UHER Department of Mineralogy and Petrology, Faculty of Natural...– xenotime-(Y) solid solutions and As-bearing thorite, coffinite and zircon, formed locally. Accompanying...kinked REECN pattern and a negative Eu anomaly. Thorite, coffinite, and zircon accommodated maximum concentrations...Keywords: arsenoflorencite-(Ce), chernovite-(Y), thorite, coffinite, arsenic, solid solution, alteration...hydratée entre chernovite-(Y) et xénotime-(Y), et thorite, coffinite et zircon arsenifères, formés localement |  | | Journal (article/letter/editorial) | | Branch Road NW, Washington, D.C. 20015, U.S.A. Department of Geological Sciences, University of Michigan...Avenue, Ann Arbor, Michigan 48109-1005, U.S.A. 3 Department of Earth and Planetary Sciences, Johns Hopkins...and the unique Oklo natural nuclear reactors in Gabon. The onset of hydrothermal transport of (UO2)2+...and the unique Oklo natural nuclear reactors in Gabon. During this phase, most uranyl minerals would have...percents of the isostructural coffinite (USiO4) or thorite (ThSiO4) end-members (Deer et al. 1997; Blundy |  | Yuan, Feng, Jiang, Shao-Yong, Liu, Jiajun, Zhang, Shuai, Xiao, Zhibin, Liu, Gang, Hu, Xiaojia (2019) Geochronology and Geochemistry of Uraninite and Coffinite: Insights into Ore-Forming Process in the Pegmatite-Hosted Uraniferous Province, North Qinling, Central China. Minerals, 9 (9) 552 doi:10.3390/min9090552 | Journal (article/letter/editorial) | | Ore-Forming Process in the Pegmatite-Hosted Uraniferous Province, North Qinling, Central China Feng Yuan 1 , Shao-Yong...low-grade, large-tonnage pegmatite-hosted uraniferous province. Uraninite is predominant and ubiquitous ore mineral...Guangshigou biotite pegmatites in this uraniferous province reveal the primary magmatic U mineralization and...timing of U mineralization in the uraniferous province was constrained at 407–415 Ma, confirming an Early...composition; Shangdan pegmatite-hosted uraniferous province 1. Introduction There is an increased demand |  | | Journal (article/letter/editorial) | | solutions between coffinite [USiO4], zircon [ZrSiO4], thorite [ThSiO4] and xenotime [(Y,REE)PO4] (e.g. Speer...silica (i.e. A > B) is identified in analyses of Bangombé coffinite (Janeczek and Ewing, 1996), and this...substitution [c8] for both the A and B sites within thorite (Förster, 2006), and this may also be applicable...and this is also true for Olympic Dam coffinite. Thorite precipitates at 200°C–400°C, whereas coffinite... A., Poinssot, C. and Dacheux, N. (2014) From thorite to coffinite: A spectroscopic study of Th1-xUxSiO4 |  | Dutkiewicz, A., George, S.C., Mossman, D.J., Ridley, J., Volk, H. (2007) Oil and its biomarkers associated with the Palaeoproterozoic Oklo natural fission reactors, Gabon. Chemical Geology, 244 (1) 130-154 doi:10.1016/j.chemgeo.2007.06.010 | Journal (article/letter/editorial) | | Palaeoproterozoic Oklo natural fission reactors, Gabon A. Dutkiewicz a,⁎, S.C. George b , D.J. Mossman...Australia Australian Centre for Astrobiology, Department of Earth and Planetary Sciences, Macquarie University...Australia c Department of Geography, Mount Allison University, Sackville, NB, Canada E4L A7 d Department of Geosciences...Formation sandstone of the Franceville Basin in Gabon that hosts the Oklo natural fission reactors has...Palaeoproterozoic Franceville Basin at Oklo in Gabon (Fig. 1). The basin is famous for hosting the only |  | | Journal (article/letter/editorial) | | MISHRA1,* AND AIVELIAGARAM V. JEYAGOPAL2 1 2 Department of Geology and Geophysics, Indian Institute of...2003), allanite (Janeczek and Eby, 1993), and thorite (Farges and Calas, 1991). Halos of secondary phases...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...probably represent phases such as (Th,U)SiO4 (thorite, a lowtemperature polymorph of huttonite) and USiO4 |  | Yu, Chi-Da, Wang, Kai-Xing, Liu, Xiao-Dong, Cuney, Michel, Pan, Jia-Yong, Wang, Gang, Zhang, Lin, Zhang, Jian (2020) Uranium Mineralogical and Chemical Features of the Na-Metasomatic Type Uranium Deposit in the Longshoushan Metallogenic Belt, Northwestern China. Minerals, 10 (4) 335 doi:10.3390/min10040335 | Journal (article/letter/editorial) | | China and belongs to the Qilian-Kunlun uraniferous province [31]. The Hongshiquan intrusive-type uranium deposit...associated to magnetite, with a small amount of thorite crystals, in ore stage I at high temperature. Pitchblende...and calcite crystal coexisting with galena and thorite. (F) Altered pitchblende A and B rims around apatite...Ap—apatite; Brt—barite; Cal—calcite; Gn—galena; Thr—thorite; Ptb—pitchblende; Py—pyrite; Ti Oxide—titanium...uranium deposit of the Longshoushan area, Gansu Province and their genesis. Geol. Explor. 2012, 48, 1101–1108 |  | | Journal (article/letter/editorial) | | whereas the others form clusters with xenotime, thorite, monazite or apatite. Type-1 crystals are mainly...with other accessory minerals, such as xenotime, thorite, apatite or monazite. These crystals occur mostly...irregular crystals (usually <2 mm in length) of thorite or xenotime, or larger crystals of rock-forming...usually appear to be associated with xenotime, thorite and monazite. This type of zircon mainly appears...isolated crystals or grouped with xenotime and thorite, or less commonly with apatite and monazite. This |  | Seydoux-Guillaume, Anne-Magali, Montel, Jean-Marc, Bingen, Bernard, Bosse, Valérie, de Parseval, Philippe, Paquette, Jean-Louis, Janots, Emilie, Wirth, Richard (2012) Low-temperature alteration of monazite: Fluid mediated coupled dissolution–precipitation, irradiation damage, and disturbance of the U–Pb and Th–Pb chronometers. Chemical Geology, 330. 140-158 doi:10.1016/j.chemgeo.2012.07.031 | Journal (article/letter/editorial) | | Th–U(Y)-depleted, high-Th/U, monazite (Mnz2) accompanied by thorite/huttonite (ThSiO4), thorianite (ThO2) and xenotime...producing allanite, apatite, rhabdophane, thorianite, thorite/huttonite, bastnäesite, or synchysite (Finger et...Th-rich phase such as thorianite (ThO2; Thn) or thorite/ huttonite (ThSiO4; Thr/Htn). To our knowledge...the structural state of monazite in contact with thorite. The Arendal monazite was previously studied by...330–331 (2012) 140–158 thorianite or thorite (we will use thorite to denote the thorium silicate, although |  | Švecová, E., Čopjaková, R., Losos, Z., Škoda, R., Nasdala, L., Cícha, J. (2016) Multi-stage evolution of xenotime–(Y) from Písek pegmatites, Czech Republic: an electron probe micro-analysis and Raman spectroscopy study. Mineralogy and Petrology, 110 (6) 747-765 doi:10.1007/s00710-016-0442-6 | Journal (article/letter/editorial) | | type of inclusions: i) xenotime with coffinite-thorite, cheralite and monazite inclusions and ii) xenotime...Chakhmouradian * Z. Losos losos@sci.muni.cz 1 Department of Geological Sciences, Faculty of Science, Masaryk...Th-silicates (close to intermediate coffinite-thorite compositions), cheralite, and sparse larger (≤40...are commonly accompanied by tiny inclusions of thorite (Fig. 5a, b). Y,REE,Ti, Nb-oxides are altered to...coffinite component (≤5 mol% USiO4) predominates over thorite (≤3 mol% ThSiO4) and the cheralite substitution |  | Nasdala, Lutz, Hanchar, John M., Rhede, Dieter, Kennedy, Allen K., Váczi, Tamás (2010) Retention of uranium in complexly altered zircon: An example from Bancroft, Ontario. Chemical Geology, 269 (3) 290-300 doi:10.1016/j.chemgeo.2009.10.004 | Journal (article/letter/editorial) | | Kristallographie, Universität Wien, A-1090 Wien, Austria Department of Earth Sciences, Memorial University of Newfoundland...GeoForschungsZentrum GFZ, D-14473 Potsdam, Germany d Department of Imaging and Applied Physics, Curtin University...District, Ontario, Canada. They originate from a thorite–zircon-rich albite leucogranite, a granite pegmatite...associated skarn rocks enriched in zircon and thorite (Satterly, 1957). Microprobe mounts were produced...stratification in the archaean crust of the superior province: evidence for infra- and subcrustal accretion |  | Števko, M., Uher, P., Ondrejka, M., Ozdín, D., Bačík, P. (2014) Quartz-apatite-REE phosphates-uraninite vein mineralization near Čučma (eastern Slovakia): a product of early Alpine hydrothermal activity in the Gemeric Superunit, Western Carpathians. Journal of GEOsciences, 59 (3) 209-222 | Journal (article/letter/editorial) | | UHER, Martin ONDREJKA, Daniel OZDÍN, Peter BAČÍK Department of Mineralogy and Petrology, Faculty of Natural...xenotime. Such mechanism was proposed for similar thorite and uraninite inclusions in xenotime and monazite...Hetherington CJ, Harlov DE (2008) Metasomatic thorite and uraninite inclusions in xenotime and monazite...siogenic REEs from a natural fission reactor at Bangombé, Gabon. Amer Miner 81: 1263–1269 Kohút M, Stein H |  | | 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 . . . . . . . . . . . . . . ....Formation enthalpy of ThSiO4 and enthalpy of the thorite ¡ huttonite phase transition . . . . . . . . . |  | Macmillan, Edeltraud, Cook, Nigel J., Ehrig, Kathy, Ciobanu, Cristiana L., Pring, Allan (2016) Uraninite from the Olympic Dam IOCG-U-Ag deposit: Linking textural and compositional variation to temporal evolution. American Mineralogist, 101 (6) 1295-1320 doi:10.2138/am-2016-5411 | Journal (article/letter/editorial) | | found in “natural fisson reactors” such as Oklo (Gabon; Janeczek and Ewing 1995), but PbO contents of 7–10...South Australia) is part of the Olympic Cu-Au-(U) province in the eastern Gawler Craton (e.g., Skirrow et...of uranium can also be found in uranothorite, thorite, thorianite, hematite, and REY-group minerals (Reeve...dentée” uraninite textures described from Oklo, Gabon (Gauthier-Lafaye et al. 1996). Some of the simplest...P-coffinite from the natural fission reactor at Bangombé, Gabon. American Mineralogist, 94, 827–837. Depiné |  | | Report (issue) | | deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...(Uzbekistan). • Tectonic-lithologic type — Mikouloungou (Gabon) and Mas Lavayre, Lodève district (France). • ...within the Kendyktas-Tchou-Ili-Betpak-Dala U-Cu province, which is limited by alpine regional faults. Tectonically...affected the Kendyktas structural-metallogenic province: • • • ductile and brittle deformation of the...sediments. The Kendyktas structural-metallogenic province is divided into two sedimentary zones: (a) the |  | Zamyatin, Dmitry A., Shchapova, Yuliya V., Votyakov, Sergey L., Nasdala, Lutz, Lenz, Christoph (2017) Alteration and chemical U-Th-total Pb dating of heterogeneous high-uranium zircon from a pegmatite from the Aduiskii massif, middle Urals, Russia. Mineralogy and Petrology, 111 (4) 475-497 doi:10.1007/s00710-017-0513-3 | Journal (article/letter/editorial) | | 2006). Thermodynamics predicts that such phases as thorite, coffinite and hafnon should exsolve at low temperatures...stratification in the Archean crust of the Superior Province: evidence for infra- and subcrustal accretion...of intermediate solid solutions in the system thorite–xenotime–zircon–coffinite. Lithos 88:35–55 Friis...veins of the Mridino area, Belomorian eclogite province. Dokl Earth Sci 462:494–496 Knowlton WJ (1867)...Oklo-Okélobondo and Bangombé natural nuclear reactor zones (Franceville basin, Gabon). Chem Geol 171:147–171 |  | | Journal (article/letter/editorial) | | Birger Rasmussen a,⁎, Janet R. Muhling b a b Department of Applied Geology, Curtin University of Technology...brines has been reported from the Franceville basin, Gabon (Mathieu et al., 2001), where alteration is associated...Witwatersrand goldfields are the world's largest gold province (Frimmel and Minter, 2002). Most of the gold occurs...suggesting that they are huttonite rather than thorite. Compositions are variable (Table 2), with 19.4–22...Witwatersrand goldfields, the world's largest gold province. Economic Geology 100th Anniversary Volume, pp |  | | Journal (article/letter/editorial) | | contain numerous crystals of Th-rich monazite, thorite, uraninite, xenotime, wolframite, scheelite and...FARLEY2, J.D. WALKER1 1 AND T.J. BLACKBURN 1 Department of Geology, University of Kansas, 120 Lindle...source by underplated mafic magma J. MICHAEL PALIN Department of Geology, University of Otago, Dunedin, New...zircon from the Franceville series at Bidoudouma, Gabon L. NASDALA Johannes Gutenberg-Universität, Mainz...HORIE1, H. HIDAKA1 AND F. GAUTHIER-LAFAYE2 1 Department of Earth and Planetary Systems Science, Hiroshima |
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