 | | Book | | ........................................... 36 Gabon .................................................. and by the early part of the 18th centu ry pitchblende was recognized by the miners as a distinct substance...produced "uranium" powder in 1789 by reducing pitchblende with charcoa l. This p roduct was assumed to...and G. Bemont isolated the element radium from pitchblende mined at Jachymov. Later work by Ernest Rutherford...uranium if higher prices justify reprocessing the mine tailings to recover some of the uranium that was |  | | Journal (article/letter/editorial) | | cryptocrystalline or colloform material known as pitchblende. Crystals are uncommon; they are generally cubic...most famous locality, Katanga district (Shaba Province), Zaire. Most of the uraninite-bearing veins in...temperature characteristics. Much of the uraninite (pitchblende) ore from these deposits is notably fine grained...an earlier generation of formation than the pitchblende. The Shinkolobwe deposit in Zaire produced a...processes. Figure 5 (above): Cuprosklodowskite, Musonoi mine, Zaire. Photo by Lou Perloff. Figure 6 (right): |  | | Book | | which it was discovered in Badakhshan, an Afghan province situated at the foot of the Pamir Mountains. The...ornamental purposes since Roman times (Blue John Mine). It some times displays the phenomenon of dichroism:...manganese deposits in warm climates, such as Moanda, in Gabon, or Hotazel, South-WestAfrica. 1 - Dolomite (Eugui...of the crystals can be quite brilliant. In Morgan Mine, Carson Hill (Calaveras County, Colorado), in the...Montana, Romania): 0.2 cm. 2 - Native gold (N’Dangi, Gabon): 4 cm. n . Jib- 'W * ■* R-? '. |  | | Journal (article/letter/editorial) | | Francevillian(Lower Proterozoic)Uranium Ore Depositsof Gabon F. GAUTHIER-LAFAYE AND F. WEBER Centrede Sddimentologie...lowerProterozoicuraniumore depositsin the Francevillebasin(Gabon)are the oldest high-gradeuraniumaccumulations known...(Bonhommeet al., 1982; Gauthier-Lafaye, in southeastern Gabon and rests on the Archean 1986). (2,700 Ma) basementrocksof...Geologicmap of Gabon.Insert showsthe locationof Gabon in Africa. teau,the StanleyPool,andthe Batekeplateauseries...ins five other uranium ore deposits:Boyindzi, Mounana,Okelobondo,Bangomb6,and Mikouloungou.For thisreasononlythe |  | | Journal (article/letter/editorial) | | DRC; (b) chervetite on francevillite from Mounana mine, Gabon. Field of view ∼2.5 mm across. Collection...Eva mine, Northern Territory, Australia Ranger U mine, Northern Territory, Australia Ranger U mine, Northern...Territory, Australia Ranger U mine, Northern Territory, Australia Sleisbeck U mine, Northen Territory, Australia...Musonoi mine, Shaba, DRC Shinkolobwe mine, Shaba, DRC Shinkolobwe mine, Shaba, DRC Mounana mine, Gabon Mounana...Mounana mine, Gabon Moctezuma mine, Sonora, Mexico Moctezuma mine, Sonora, Mexico Moctezuma mine, Sonora |  | | Book | | ........................................... 75 Gabon ..................................................by the early part of the eighteenth century, pitchblende was recognized by the miners as a distinct substance...produced "uranium" powder in 1789 by reducing pitchblende with charcoal. This product was assumed to be... Be111ont isolated the element rad ium from pitchblende mined at Jachymov. Later work on radjoactive...vvastewater during environmental reclamation at a mine that has ceased production. The following statistical |  | | Journal (issue) | | James R. Winchell The Uranium-Vanadium Deposit of Mounana, G a b o n ......................................THINK YOU HAVE FOUND A NEW MINERAL? Pete J. Dunn Department of Mineral Sciences Smithsonian Institution Washington...species, the locality, and the particular part of the mine or quarry from which the spec imens came, the date...were unearthed. Miscellaneous by-products at the mine were dumped, and it was in this area of the operation...areas of the operation were visited, and the actual “mine” and its operation were observed. Of particular |  | | Catalog/List | | attention at all times. JULY 1973 1. ADAMITE. Ojuela Mine, Mapimi, Mexico. Choice well-formed yellowish green...gossan. lxl lT • £1- 6. ARTHURITE. Hingston Down Mine, Gunnislake, Cornwall. Rich green crystaline to...Li~ht green 2tx2t". £1. AUTUNITE. South Terras Mine, st. Stephens, Cornwall. Light yellowish green platy...encrusting black Pitchblende and Quartz matrix. 2xlt". £2.50. A?1JRITE. Copper Queen Mine, Bisbee, Arizona...crystals. 3tx2t". £10. 10. A?1JRITE. Carharrack Mine, Gwennap, Cornwall. Fine bright blue platy crystals |  | | Journal (article/letter/editorial) | | discovery of a natural reactor by the French C.E.A. in Gabon. The relationships of these ratios with the U contents...rdcente d'un rdacteur naturel par le C.E.A. au Gabon. Les relations concentration-composition en uranium...in the Oklo sedimentary uranium ore deposit o f Gabon [1 ] (Fig. 1). These anomalies are located in three...drillings and has not y e t been reached by the mine working. Preliminary chemical and isotopic measurements...geological m a p of Gabon, with location o f the Franceville formation and the Oklo and Mounana mines. ~ / |  | | Catalog/List | | gossan in association. 2!-x2". £1.25. Hingston Down Mine, Gunnislake, Cornwall. Rich apple green crystaline...granite. 2tx2t". £1. BARYTDCALCITE.Nentsberry Haggs Mine, Alston, Cumberland. Well formed sheaves of pale...Erythrite. 2xltxH". £3.5C. . 11. BOhNITE. Levant Mine, Pendeen, Cornwall. An unusual specimen showing...sulphidic matrix. 4x2t". £5. 14. BROCHANTITE. Geevor Mine, Pendeen, Cornwall. Rich emerald green crystalised...Basalt matrix 4x3". £3. 17. CASSITEhITE. Goonbarrow Mine, Bugle, Nr. St. hustell, Corm/a 11. A pure resinous |  | | Journal (article/letter/editorial) | | other selenides,as well as chalcopyrite, pyrite, pitchblende, hematite, goethite, and native gold. The name...the oxidation zone of the uranium deposit a:t Mounana, Gabon, associated with duttonite and lenoblite (Amer...of the zone of oxidation of the V deposit of Mounana, Gabon. The name is for H.-J. Schubnel, mineralogist...neues Mineral aus den oxidationszonen der Tsumeb-Mine, siidwest afika. Neues Jahrb. Mi,neral., Monatsh...Microprobe analyses of samples from the Martin Lake mine and from the Eagle claims near llal Lake, both in |  | | Report (issue) | | deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia complex deposits: Deposits...material, mainly pitchblende. Typical examples range from the thick and massive pitchblende veins of Pribram...granite or metamorphic rocks, also filled with pitchblende of Mina Fe (Spain) and Singhbhum (India). 6....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, |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PRINCIPAL URANIUM DEPOSITS OF THE WORLD ...Angola, Peoples Republic of........................ Gabon, Republic of................................. Central...minerals (pitchblende and uraninite) occur either in extensive bedded deposits of pitchblende in sedimentary...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) | | mineral names M. H. H E Y AND P. G. E M B R E Y Department of Mineralogy, British Museum (Natural History)...high-temperature modification of AsS occurs at the Alacr~in mine, Pampa Larga, Chile. It is very similar to realgar...stringers in carbonate vein material, at the Martin Lake mine, Uranium City, Lake Athabasca, Saskatchewan, are...mineral in the uranium-vanadium deposit of Mounana, Gabon, is monoclinic, a II'7o, b 3"63, e 20.o6 A...platy anorthic crystals from the Alai alkalic province have a 5.41, b I1.74, c 2 H 6 A, ~ 89~ fi 9o~ |  | | 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...but also in vein and veinlike-type deposits. "Pitchblende" is used for U0 2 + x varieties of micro- or |  | | Journal (article/letter/editorial) | | uraniumthat theycanopt to exportß Anstralia, Canada, Gabon, Niger, and South Africa (includingNamibia). Anstraliahasby...(<$30/1b UaOs) Canada, South Africa USA, Niger, Gabon Australia, Canada, France Namibia Australia 500...UaOs are known,and the capitalinvestmentrequiredto mine such depositsis nmch higher and riskier than for...Canada 20 184 igneous conglomerate,vein France Gabon India 41 22 33 vein sandstone vein Niger South...reservesplus productionof 25,000 to 40,000 the Pitch mine. Colorado; and the Sherwoodmine, short tons UaOs |  | | Journal (article/letter/editorial) | | the Oklo and Bangombé natural fission reactors, Gabon LENA Z. EVINS,1,* KELD A. JENSEN,2,3 and RODNEY...Museum of Natural History, Stockholm, Sweden Department of Geological Sciences, University of Michigan...reactors formed ca. 2 Ga ago in the Franceville basin, Gabon. The response of uraninite in the natural reactors...situated in the ca. 2 Ga old Franceville basin, SE Gabon, and formed contemporaneously with the other U deposits...deposits found in the Franceville Basin: Boyindzi, Mounana, Mikouloungou and Kiene (Fig. 1). Unique to the |  | | Journal (article/letter/editorial) | | ore minerals occurring in the reduced zone are pitchblende and coffinite, to some extent associated with...irregularly laid pipe. Main ore minerals are pitchblende and coffinite. In addition, selenium as ferroselite...clastic Main ore minerals in the reduced zone are pitchblende with subordinate coffinire. In the oxidized zone...deposits are found in the Franceville Basin of Gabon and at Ambrosia Lake/Grants District, New Mexico...1977) Veinlike deposits are characterized by pitchblende mineralization in massive ore veins (Nabarlek/Aust |  | | Journal (article/letter/editorial) | | Paleoproterozoic natural nuclear fission reactors of Oklo, Gabon: paragenesis, thermal maturation and carbon isotopic...François Gauthier-Lafaye b, Simon E. Jackson c,1 a Department of Physics, Engineering and Geoscience, Mount...France c Centre for Earth Resources Research, Department of Earth Sciences, St. John’s, Newfoundland,...Introduction The Paleoproterozoic Franceville Series of Gabon has been described as the most impressive sedimentary...to the geology of Oklo and environs, Republic of Gabon, showing the location of uranium deposits and selected |  | | Report (issue) | | UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Geology and genesis of major world hardrock....................................44 Grenville Province, Quebeck and Ontario............................orebody.....................39 20. Grenville Province of the Canadian Shield......................46...Saskatchewan.............53 22. Geology of the Rossing mine area...............................55 iii Illustrations...cross section of Verna and Fay orebodies, Eldorado mine................................................ |  | De Vivo, B., Ippolito, F., Capaldi, G., Simpson, P. R. - Eds. (1984) Uranium geochemistry, mineralogy, geology, exploration and resources. Springer Netherlands. doi:10.1007/978-94-009-6060-2 | Book | | were unknown until 1780, when Wagsfort found a pitchblende sample in 10hanngeorgenstadt. This discovery...species of a zinc mineral-hence the n':lme 'pitchblende' (= pitch-like blende). Seven years later, Klaproth...the separation and, in so doing, reduced the pitchblende. His attempt was not successful and only U02...which, in 1780, Wagsfort had found the first pitchblende sample. The other known mineral deposits at that...Becquerel discovered the radioactive property of pitchblende and the Curies isolated radium. Suddenly scientists |  | | Book | | On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE...Allgood, C. Williams: Ramsdellite from the Mistake mine [Arizona] 14:333-335 ALLGOOD, ROBERT W. -with G...the Mistake mine [Arizona] 14:333-335 ALMA Famous mineral localities: the Home Sweet Home mine, [near Alma |  | | Book | | the Academy was in charge of the newly founded Department of Mining. The mineral collection was transferred...University building at "Unter den Linden". The Department of Mining, and thus the Academy itself and its...particularly interesting collection of miners' lamps and mine surveying instruments. Ancient and mediaeval mining...worn by mine officials of Saxony on ceremonial occasions. A special attraction is a model mine, 20m below...N. from the main railway station, landmark is a mine headframe. Tues.- Fri. 8.30-17.30 hrs.; Sat.- Sun |  | | Report (issue) | | CHAPTER 1: INTRODUCTION Kurt Kyser Department of Geological Sciences and Geological Engineering, Queen’s...Nancy, France michel.cuney@g2r.uhp-nancy.fr the pitchblende led to the discovery of Po and Ra shortly thereafter...precipitated a yellow compound by dissolving pitchblende in nitric acid and neutralizing the solution...(Becquerel 1896). Realization that U isolated from pitchblende was less radioactive than Short course co-sponsored...engineered. Once an ore deposit is discovered, a mine is developed and U extracted by a variety of mining |  | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book | | block I experienced recently when visiting a gold mine in virtually unmetamorphosed ground. A fault cuts..."common sense" observations described from the gold mine with the chert and the organic matter. Another potent...Alterations of Conglomeratic Uranium Ores, Pronto Mine, Ontario, Canada E.Wm. Heinrich (With 1 Figure)...Observations on Ore Rhythmites of the Trzebionka Mine, Upper Silesian-Cracow Region, Poland L. Fontbote...the Cobaltite-Gersdorffite Series from the Raipas Mine, Finnmark, Norway F.M. Vokes and G.S. Strand (With |
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Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon