 | | Journal (article/letter/editorial) | | 487 DETRITAL MONAZITE IN THE TIM MERSOI BASIN, NIGER: PROVENANCE AND CONTRIBUTION TO THE URANIUM BUDGET...and Jurassic sediments of the Tim Mersoï basin, Niger. Despite variations in the size and shape of monazite...Pan-African granites and metamorphic rocks from the Aïr Mountains, and probably also from the basement near Zinder...electron-microprobe dating, Tim Mersoï Basin, Aïr Massif, Niger. Sommaire Une cartographie détaillée et des...à l’Est, mais également de la région de Zinder, Niger et du Nigeria au sud. Cette hypothèse est en bon |  | Turpina, Laurent, Clauer, Norbert, Forbes, Pierre, Pagel, Maurice (1991) UPb, SmNd and KAr systematics of the Akouta uranium deposit, Niger. Chemical Geology: Isotope Geoscience section, 87 (3). 217-230 doi:10.1016/0168-9622(91)90022-o | Journal (article/letter/editorial) | | Sm-Nd and K-Ar systematics of the Akouta uranium deposit, Niger Laurent Tutpin”,“, Norbert Clauerb,Pierre...deposit, Niger. Chem. Geol. (Isot. Geosci. Sect.), 87: 217-230. and K-Ar systematics of the Akouta uranium...Different minerals of the Akouta sandstone-hosted uranium ore deposit in Niger have been investigated by...rocks were a probable source of uranium for the Akouta ore deposit. 1. Introduction Chronological investigations...reports U-Pb, Sm-Nd and K-Ar systematics of the Akouta strata-bound sedimentary deposit. This ore deposit |  | | Report (issue) | | (China), Hamr-Stráz (Czech Republic), Akouta, Arlit, Imouraren (Niger) and Colorado Plateau (USA). • Basal...mineralisation can be up to 1.5 km. Ores are uraninite-brannerite by composition and belong to ordinary...concentrated as primary uranium ore, generally uraninite, in the permeable breccia matrix, and in the arcuate...Limestone in the Grants district (USA) where uraninite occurs in intraformational folds and fractures...activities include drilling and coring to complete final mine plans and establish final processing flowsheets |  | | Journal (article/letter/editorial) | | deposits from western United States, Europe, and Niger are mostly associated with type III kerogens. Ore-...France; Randstadt, Sweden), African (Arlit-Akouta, Niger), Russian (Siberia, USSR) and US (Chattanooga)...the polymerization of light hydrocarbons around uraninite grains (Liebenberg, 1955; Schidlowski, 1981),...the polymerization of light hydrocarbons around uraninite grains. Such examples illustrate that the very...history of the host sediments. Only the Arlit (Niger), Arizona (USA), and Lod~ve (France) deposits contain |  | | Journal (article/letter/editorial) | | both cases. In the case of a uranium ore (SOMAÏR, Niger) and associated UOC, the observed fractionation...jordisite (amorphous MoS2) are often associated with uraninite or pitchblende. Mo is also present in small quantities...Annex. The ore samples that feed the COMINAK mill, Niger were taken in situ in the galleries of underground...mines while the ores that feed the SOMAÏR mill, Niger were sampled after blending of large batches extracted...02 6) Trekkopje, Namibia COMINAK, Niger COMINAK, Ebba North, Niger 0.5 1.1 11.9 0.004 0.066 24.8 0 |  | | Journal (article/letter/editorial) | | Printed in t .OO Experimental evidence of uraninite formation from diagenesis of uranium-rich organic... uranyl-carboxylic complexes decompose while uraninite forms. The chemical composition of the experimentally...to form uraninite is directly related to the dehydrogenation of lignite. The resulting uraninite has a...uraninites observed in sedimentary environments. Uraninite not only forms in the pore space but also replaces...lignite constituents. The results demonstrate that uraninite may form during thermal evolution of uranium-rich |  | | Journal (article/letter/editorial) | | theycanopt to exportß Anstralia, Canada, Gabon, Niger, and South Africa (includingNamibia). Anstraliahasby...grade (<$30/1b UaOs) Canada, South Africa USA, Niger, Gabon Australia, Canada, France Namibia Australia...UaOs are known,and the capitalinvestmentrequiredto mine such depositsis nmch higher and riskier than for...France Gabon India 41 22 33 vein sandstone vein Niger South Africa (incl. Namibia) 176 336 sandstone...reservesplus productionof 25,000 to 40,000 the Pitch mine. Colorado; and the Sherwoodmine, short tons UaOs |  | | Journal (article/letter/editorial) | | Schwartzwalder, Colorado, USA North Canning, Owl Creek Mountains, Wyoming, USA Ukraine Oklo, Gabon, Africa Northern...Australia La Lauzier, Alps Mohave County, Arizona, USA Akouta, Nigeria, Africa Slick Rock district., Colorado...Bohemian Massif, Czechia Olympic Dam, Australia Akouta, Nigeria, Africa Lodeve, France Oklo, Gabon, Africa...Africa Coronation Hill, Australia Capitan Mountains, New Mexico, USA Athabasca Basin, Saskatchewan, Canada...(1965). N. A. Kulik, “Joint simultaneous growth of uraninite and brannerite and some data on conditions of |  | Bute, Saleh Ibrahim, Yang, Xiaoyong, Suh, Cheo Emmanuel, Girei, Musa Bala, Usman, Musa Bappah (2020) Mineralogy, geochemistry and ore genesis of Kanawa uranium mineralization, Hawal Massif, eastern Nigeria terrane: Implications for uranium prospecting in Nigeria and Cameroon. Ore Geology Reviews, 120. 103381 doi:10.1016/j.oregeorev.2020.103381 | Journal (article/letter/editorial) | | shear zones, extend from Nigeria in to Cameroon and Niger, and could be linked to other mega shear zones in...al., 2012). The U-bearing minerals are mainly uraninite and the ore minerals occur as disseminated in...mineralized veins (Fig. 6bc). Finely disseminated uraninite and coffinite were identified in the mineralized...mineralized bands (Suppl. Fig. S1). The uraninite and coffinite grains are associated with sulfides, barite,...replacement of pyrite by quartz, uraninite and galena, indicate uraninite and galena were coeval. The replacement |  | | Report (issue) | | of the western margin of the Air Mountains in the Republic of Niger ...................................United States, and most of the remainder was from Niger, France, Argentina, and Japan. Reasonably Assured...domestic sources of uranium in Argentina, Japan, Niger, and the United States and are an important source...terrane. The chief primary uranium minerals are uraninite (pitchblende), coffinite, and urano-organic complexes;...percent came from the United States, 6 percent from Niger, 4.7 percent from France, and the remainder from |  | | Journal (article/letter/editorial) | | of authigenic vanadium clays, vanadium oxides, uraninite, coffinite, and their alteration products (mainly...to Alpine metamorphism (=200"-400"C?) Akouta U deposit, Niger, Visean sandstone (Forbes, 1989) chlori...formation des mineralisations a U-Zr-Zn-V-Mo d' Akouta (Niger): Geol. Geochim. Uranium. Mem .. Nancy. France...(1964) Vanadium silicate minerals from the Yamato Mine, Kagoshima Prefecture, Japan: Sci. Rep. Kyushu Univ |  | | Journal (article/letter/editorial) | | because we have selected the freshest samples from mine open pits to get the best preserved melt inclusions...associated with acidic volcanism, as observed at Akouta in Niger (Forbes 1989) and Müllenbach in Germany (Pironon...allanite (Pagel 1982; Cuney and Friedrich 1987). Uraninite is sometimes present. In the Streltsovka granites...allanite and uranothorite have been observed. Uraninite may have been present but leached during hydrothermal...allanite/monazite, zircon, apatite and possibly uraninite were the major hosts for uranium in the granites |  | | Report (issue) | | NAMIBIA NEPAL NETHERLANDS NEW ZEALAND NICARAGUA NIGER NIGERIA NORWAY OMAN PAKISTAN PALAU PANAMA PAPUA... Description of a selected deposit: The Denison mine deposit (Canada) ....... 304 Surficial deposits...magmatic uranium mainly from (i) peraluminous, uraninite-bearing leucogranitoids (e.g. the European Variscan...represented by quartz-pebble conglomerates, where uraninite is accumulated with other heavy; (b) SRt: synsedimentary...Slovakia); Subtype 4.3. Volcano-sedimentary (Anderson Mine, USA; Sierra Pintada district, Argentina). Type |  | | Report (issue) | | engineered. Once an ore deposit is discovered, a mine is developed and U extracted by a variety of mining...and richest U deposits (e.g. McMurray 2006). Uraninite is the major mineral in these deposits, although...affected by later fluid events that have altered the uraninite. Major deposits occur in the Athabasca Basin...Colorado Plateau (USA), Beverley (Australia), Akouta (Niger) Rabbit Lake, McArthur River (Athabasca Basin);...sandstone U deposits occur in sandstone deposits in Niger, Kazakhstan, Uzbekistan and the Karoo of South Africa |  | | Journal (article/letter/editorial) | | during the exploration and development of the uranium mine at this site (Hoeve and Sibbald, 1978). Its presence...drillholes in bitumen-bearing rocks in the Boliden mine indicate abundant methane (Grip and Ödman, 1944)...methane-rich gas, released during excavation of the mine. 2.2. Techniques 2.2.1. Pyrolysis–gas chromatography–mass...terrestrial, biogenic organic matter from the Akouta deposit in Niger indicate that organic matter with U concentrations... G., 1943. A titano-thucholite from the Boliden Mine. Geol. Foren. Stock. Foer. 432, 31–36. Baratta, |  | | Journal (article/letter/editorial) | | montroseite, melanovanadite, new Ca-Fe-V phase, uraninite and clausthalite are intensely altered to supergene...association with melanovanadite and tyuamunite. Uraninite forms abundant microscopic (up to 50 - 80 μm)...microscopis (25 μm) grains in association with uraninite and montroseite. Pascoite occurs as transparent...metarossite, sherwoodite, metatyuamunite, tyuamunite, uraninite, chemical composition, X-ray data, Prachovice...2011). Na podzim roku 2007 zde byla nalezena V-U mine- ralizace, která z této oblasti nebyla doposud |  | | Report (issue) | | NAMIBIA NEPAL NETHERLANDS NEW ZEALAND NICARAGUA NIGER NIGERIA NORWAY OMAN PAKISTAN PALAU PANAMA PAPUA.........................................59 3.3.4. Mine data .............................................Canada Russian Federation Namibia South Africa Niger Brazil China Greenland (Denmark) Ukraine Mongolia...Rössing in Namibia and the closure of the Kayelekera mine in Malawi as a result of low prevailing uranium...Germany Australia Russian Federation South Africa Niger Uzbekistan Ukraine Namibia Czech Republic France |  | Rallakis, Dimitrios, Michels, Raymond, Brouand, Marc, Parize, Olivier, Cathelineau, Michel (2019) The Role of Organic Matter on Uranium Precipitation in Zoovch Ovoo, Mongolia. Minerals, 9 (5) 310 doi:10.3390/min9050310 | Journal (article/letter/editorial) | | , Two matrix phasessupported were identified—uraninite and coffinite, sometimes samples also of variable...and sandstones cemented by occurring together. Uraninite forms independent spheres at a minimum size range...discussed in [36]. Two phases were identified—uraninite and coffinite, sometimes while Ca-P-rich coffinite...(Figure 4). Aggregates of the occurring together. Uraninite forms independent spheres at µm a minimum size...the two end-members. most abundant U 4) mineral uraninite deviating concentrations. The U + Ca versusThe |  | | Journal (article/letter/editorial) | | reducing conditions. U4+ forms ore minerals such as uraninite and pitchblende, while U6+ forms (UO2)2+ complexes...quartz-pebble conglomerates shed from Archean-age mountains located in what is now southern Africa and Canada...Inkay, Kazakhstan; Westmoreland, Australia; Akouta, Niger; Hamr-Straz, Czech Republic 3 Hematite breccia...29%; Australia, 22%; Kazakhstan, 9%; Russia, 8%; Niger, 8%; Namibia, 8%; and Uzbekistan, ELEMENTS 191 |  | | Book | | ............ ..... ........................ 80 Niger ..................................................-l 72J 00 Nan1ibia 0 5,900 234,900 362,600 Niger 5.500 5,500 339,000 340.600 Russian Federation...vvastewater during environmental reclamation at a mine that has ceased production. The following statistical...Saskatchewan, is the world's largest high-grade uraniu1n mine. The ore from that ,nine is crushed and treated...to start production at the Talvivaara Ni-Zn-Cu-Co mine, ,vhere bio-heap leaching is used to extract metals |  | | Journal (article/letter/editorial) | | calcschists were collected in and next to the Montdardier mine about 3 km to the W 135 of the Les Malines district...dolostones taken in 136 the neighborhood of the mine. In the second sector about 50 km to the SW, four...Lavayre mine with five samples from a transect across the 138 Saint-Julien fault visible in the mine at...drilling MLV located 1 km to the E of the Mas Lavayre mine 140 (Fig. 1D). In addition to these clay-rich...tuffaceous beds of Autunian sediments from Mas Lavayre mine 142 were also purified, analyzed for their K-Ar |  | | Book | | NAMIBIA NEPAL NETHERLANDS NEW ZEALAND NICARAGUA NIGER NIGERIA NORTH MACEDONIA NORWAY OMAN PAKISTAN PALAU...Russian Federation; Kurišková, Slovakia Anderson Mine, USA; Sierra Pintada district, Argentina Kirovograd...associated with intrinsic reductant Arlit district, Niger Ambrosia Lake district (Grants region), USA Salt...of copper mining as exemplified by the Phalabora mine. – Carbonatite deposits constitute unconventional...Andujar, Asele, Bange Jiali, Beiras, Burgas, Burro Mountains, Cabeza de Araya, Central Bohemian, Chandu, Coast |  | | Corporate Document | | initial beneficiary of a change in the ALP’s “3 mine” policy as it has both a supportive state government...negatively impacted 2H07. Langer Heinrich uranium mine (Paladin Resources, ASX:PDN) is now in production...March 2007 Uranium, Base Metals Canada, Ireland, Niger Exploration Exchanges: TSX.V:BAY, FWB:B2V Production...discovery; sedimentary, IOCGU and Rossing type targets. Niger uranium property grants expected 1H07 (780kha)....Canada's most prospective uranium regions and in Niger. BAY has the largest land holding in the Thelon |  | | Book | | Granite-Related Vein Uranium Deposits: Schwartzwalder Mine, Front Range, USA ................................this are: Uraninitelpitchblende: In this book "uraninite" is used for the macrocrystalline, more or less...(amorphous) 2 Uraninite Pitchblende or or Euhedral (subhedral) uraninite Colloform uraninite Sooty pitchblende...pitchblende or Sooty uraninite chemical properties (for details see Fritsche et al. in press; Ramdohr...1) and is widely used, particularly in Europe. Uraninite is a term commonly used for all kinds of uranium |  | Jaraula, Caroline M.B., Schwark, Lorenz, Moreau, Xavier, Pickel, Walter, Bagas, Leon, Grice, Kliti (2015) Radiolytic alteration of biopolymers in the Mulga Rock (Australia) uranium deposit. Applied Geochemistry, 52. 97-108 doi:10.1016/j.apgeochem.2014.11.012 | Journal (article/letter/editorial) | | microscope identified coffinite [U (SiO4)1 x (OH)4x] and uraninite [UO2] and noted unidentified sulfides associated...organic matter associated with the Akouta uranium deposits (Niger): geological implications. Chem. Geol...P., Pagel, M., 1990. Experimental-evidence of uraninite formation from diagenesis of uranium-rich organic-matter |
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