 | | Journal (article/letter/editorial) | | revival in the collection of uranium minerals. Uraninite (Cook 2004) and several of the most common secondary...mm, are not uncommon in the mines of the Grants district, McKinley County, New Mexico (Frondel 1958). Here...Mariano Lake uranium deposit within the Grants district (Sachdev 1980; Place, Valler, and Brookins 1980;...Jackpile mines, Laguna district, Valencia County; the Iron Mountain No. 2 district, Sierra County; and in... 1 and 4 and the Sandy No. 3 mines, Elk Ridge district; and the Happy Jack mine. Cuprosklodowskite is |  | | Journal (article/letter/editorial) | | Murchison C2 carbonaceous chondrite 4.7 Ga w Fuchs et al. Ž1973. Near-surface occurrences Modena,...Milltown Quarry, Derbyshire, UK Cheleken, Turkmenistan Florida, USA Cochise County, AZ, USA Lower Pecos...near Braunschweig, Germany Etzel24 drillhole, NW Germany Zwickau, Saxony, Germany Dohlener Basin, Dresden...Dresden, Saxony, Germany ¨ Hannebach, Eifel, Germany Kladno basin, WNW Prague, Czech Republic Northern...Schlema-Hartenstein, Saxony, Germany Himmelsfurst ¨ Mine, Freiberg, Germany Ronneburg, Thuringia, Germany Pribram, Czech |  | | Journal (article/letter/editorial) | | (Hilpert and Moench, 1960,p. a 5)' In the Laguna district, in fact, it probably accountsfor most of the...small specimen from the Woodrow mine in the Laguna district, New Mexico, has provided an opportunity to study...grained and impure. Subsequently, Hoekstra and Fuchs (1956) synthesized bluish-green coffinite with refractive...indices of 1.83 to 1.85;this material is anhydrous (Fuchs and Gebert, 1958, p. 243). Ramdohr (1960, p. 1001;1961...describe the habit of coffinite from Wcilsendorf, Bavaria. coffinite occurs also in some Tertiary vein deposits |  | Havelcová, Martina, Machovič, Vladimír, René, Miloš, Sýkorová, Ivana, Lapčák, Ladislav, Špaldoňová, Alexandra (2020) Geochemistry of shear zone-hosted uranium mineralisation at the Zadní Chodov uranium deposit (Bohemian Massif) Ore Geology Reviews, 120. 103428 doi:10.1016/j.oregeorev.2020.103428 | Journal (article/letter/editorial) | | Bohemian Massif the most important uranium ore district in the European Variscan belt. The most important...common uranium minerals were coffinite (65 vol%), uraninite (25 vol%), and brannerite (10 vol%). The uranium...dated at 260 ± 2 Ma based on the U–Pb age of uraninite, obtained by isotope dilution-thermal ionization...to the origin of small veins and veinlets of uraninite II and quartz II. During the post-ore carbonate...brannerite - UO22+, uraninite; C – (grain core) anatase, amorphous brannerite - UO22+, uraninite; D - (area to |  | | Report (issue) | | vein uranium deposits. Association: matter. Uraninite, thorite, pyrite, marcasite, roscoelite, clay...in the La Sal No. 2 mine, Beaver Mesa, Gateway district, Mesa Co., and in the Peanut mine, Montrose Co...other mines, San Juan Co., Utah. From WÄolsendorf, Bavaria; at Niederramstadt, near Schneeberg, Johanngeorgenstadt...Johanngeorgenstadt, and Niederpfannenstiel, Saxony, Germany. At HÄ uttenberg, Carinthia, Austria. From J¶achymov...a new mineral. Amer. Mineral., 41, 675{688. (2) Fuchs, All rights reserved. No part of this publication |  | | Journal (article/letter/editorial) | | Kristalle und Lebewesen.[Book re472 viewl... Brauns-Fuchs, Anleitung zum Bestimmender Mineralien. 272 [Bookreview]...(Bannister). 194 Anleitung zum Bestimmen der Mineralien.(Fuchs-Brauns) 272 [Book review] Application of differential...Stainerite. 92 Delury, J. S. and Ellsworth, H. V. Uraninite from Huron 'Winnipeg Claim, River area, S. E....(Stephens). Ellsworth, H, V. Uraninite from Ilenvey township, Parry Sdund district, Ontario. . .. and Delury...Delury, J. S. Uraninite from S. E. Manitoba. Emery, A. f[., Cooke, S. R. B. and. Howes, W. Mineragraphic |  | | Journal (article/letter/editorial) | | assachusetts.s Assrnecr It has long been known that uraninite varies widely in both composition and properties...variation in composition. Analyzed samples of uraninite were r-rayed., annealed by heating to 550' C.... including radiogenic lead, is exsolved from uraninite. A study of *-ray line I Contribution from the...orientedmonomolecular PbO (massicot) alongcubeplanesin the uraninite,separating the uraninitecrystallites so that the...to UaOs. ROLE OF LEAD AND EXCESS OXYGEN IN URANINITE 707 When Th is present, the tetragonal phase |  | Fuchs, Sebastian H.J., Schumann, Dirk, Williams-Jones, Anthony E., Murray, Andrew J., Couillard, Martin, Lagarec, Ken, Phaneuf, Michael W., Vali, Hojatollah (2017) Gold and uranium concentration by interaction of immiscible fluids (hydrothermal and hydrocarbon) in the Carbon Leader Reef, Witwatersrand Supergroup, South Africa. Precambrian Research, 293. 39-55 doi:10.1016/j.precamres.2017.03.007 | Journal (article/letter/editorial) | | Witwatersrand Supergroup, South Africa Sebastian H.J. Fuchs, Dirk Schumann, Anthony E. Williams-Jones, Andrew...March 2017 Please cite this article as: S.H.J. Fuchs, D. Schumann, A.E. Williams-Jones, A.J. Murray,...Supergroup, South Africa Author names: Sebastian H. J. Fuchs 1,2*, Dirk Schumann3, Anthony E. Williams-Jones...24148 Kiel, Germany (present address) 3Fibics Incorporated, 1431 Merivale Road, Lower Level, Suite...2B2, Canada Corresponding author: *Sebastian Fuchs Email: sfuchs@geomar.de Telephone: +49-431-600-1423 |  | Sharpe, Ryan, Fayek, Mostafa, Quirt, David, Jefferson, Charlie W. (2015) Geochronology and Genesis of the Bong Uranium Deposit, Thelon Basin, Nunavut, Canada. Economic Geology, 110 (7) 1759-1777 doi:10.2113/econgeo.110.7.1759 | Journal (article/letter/editorial) | | proposed for the Bong deposit, with three stages of uraninite identified. The premineralization phase is characterized...is separated into three main stages. Stage 1 uraninite (U1; ca. 1500 Ma) is preserved in highly fractured...that are overgrown by later stages of uraninite. Stage 2 uraninite (U2; ca. 1100 Ma) forms veinlets parallel...in organic matter nodules and blebs. Stage 2 uraninite is associated with pervasive illite that formed...δ2H: –97‰), which remobilized much of Stage 1 uraninite and completely overprinted Stage 1 alteration |  | Dolníček, Zdeněk, René, Miloš, Hermannová, Sylvie, Prochaska, Walter (2014) Origin of the Okrouhlá Radouň episyenite-hosted uranium deposit, Bohemian Massif, Czech Republic: fluid inclusion and stable isotope constraints. Mineralium Deposita, 49 (4) 409-425 doi:10.1007/s00126-013-0500-5 | Journal (article/letter/editorial) | | circulation led to precipitation of disseminated uraninite and coffinite, and later on, post-ore quartz and...formed primarily of coffinite and minor collomorph uraninite, the latter being often altered to coffinite....(U–Pb, uraninite, isotopic dilution (ID)–TIMS). The U/Pb ages of partly recrystallized uraninite from post-ore...episyenite sample No-8036.d Coffinitization (Cf) of uraninite (U) from a quartz (Qtz) vein hosted by episyenite...episyenite, sample 02c. e Quartz (Qtz) vein containing uraninite (white blebs) cut episyenite (Ep) composed of |  | | Journal (article/letter/editorial) | | OF R. HOEKSTRA THUCHOLITE AND LOUIS • H. FUCHS ABSTRACT The origin of the organic material, and...in thucholite from the Besner Mine, Parry Sound District, Ontario, have been investigated. Results indicate...other relatively soluble oxides were leached from uraninite while aluminum, iron, magnesium, and silica were...HENRY R. HOEKSTR,/I Solubility AND LOUIS H. FUCHS in Carbon Disulfide Insoluble Soluble I Liquid...the oldestpetroleumdepositsare found to have a lower averagemolecularweightthan muchyoungerdeposits. |  | Schindler, Michael, Lussier, Aaron J., Bellrose, Jacob, Rouvimov, Sergei, Burns, Peter C., Kyser, T. Kurt (2017) Mobilization and agglomeration of uraninite nanoparticles: A nano-mineralogical study of samples from the Matoush Uranium ore deposit. American Mineralogist, 102 (9) 1776-1787 doi:10.2138/am-2017-5984 | Journal (article/letter/editorial) | | ENVIRONMENT Mobilization and agglomeration of uraninite nanoparticles: A nano-mineralogical study of samples...K7L 3N6, Canada 2 Abstract The occurrence of uraninite nanoparticles in the alteration zones of uranium...waste. This study investigates the occurrence of uraninite nanoparticles in the outer alteration zone of...Canada. Selected samples with finely disseminated uraninite from the outer alteration zone of the deposit...using the focused ion beam milling technique. Uraninite nanoparticles occur as single particles, in clusters |  | | Journal (article/letter/editorial) | | granites where geochemical uranium, found as uraninite, can easily he leached through slight weathering...perhaps a brief continental interlude during the lower Cretaceous. It then follows a new phase with lagoonal...240 Middle Saxonian 250 PERMIAN Rodez LodSve Lower Autunian Stephanian 260 End of deuteric processes...nevertheless certain of a source which "seems to be uraninite 1 in the shape of inclusions or of crystals scattered...is necessary to assume that a dissolution of uraninite occurred, pointing out that these deposits cannot |  | | Journal (article/letter/editorial) | | similar to the synthetic coffinite, prepared by Fuchs and Hoekstra (1959), through the absence of an essential...uranium may be found in discreteminerals such as uraninite or coffinite,and it may occur as a urano-organic...The temperaturerange under which coffiniteforms (Fuchs and Iloekstra, 1959) and the temperature of induration...have been formed by hydrothermal replacement of uraninite by hydrocarbons polymerized by a-particle irradiation...radiation to form thucholite which in turn replaced uraninite. Christie and Keston (1949) have describedthucholite |  | Fuchs, S., Schumann, D., Williams-Jones, A.E., Vali, H. (2015) The growth and concentration of uranium and titanium minerals in hydrocarbons of the Carbon Leader Reef, Witwatersrand Supergroup, South Africa. Chemical Geology, 393. 55-66 doi:10.1016/j.chemgeo.2014.11.018 | Journal (article/letter/editorial) | | Reef, Witwatersrand Supergroup, South Africa S. Fuchs a,⁎, D. Schumann b,c, A.E. Williams-Jones a, H....Canada Fibics Incorporated, 1431 Merivale Road, Lower Level, Suite 100, Ottawa, ON K2E0B9, Canada c Department...Keywords: Bitumen Oil as an orefluid Nanoparticles Uraninite Anatase Witwatersrand a b s t r a c t Uranium...study provides evidence for the insitu growth of uraninite and anatase nanocrystals in the pyrobitumen, implying...liquid hydrocarbons. Individual nanocrystals of uraninite and anatase are pervasively distributed and locally |  | | Report (issue) | | Desmond Pretorius Vein-type Uranium Deposits - Helmut Fuchs Proterozoic Unconformity and Stratabound Uranium...and the uranium community worlwide. Dr. Helmut Fuchs, who guided the work of this project on vein-type...mbH in Frankfurt am Main, Federal Republic of Germany, and his colleagues who assisted, deserve special...helping to improve the English of some papeis. Helmut Fuchs Project Manager Eaitor EDITORIAL NOTE In preparing....................................... 7 H. D. Fuchs The problem of uranium mineralization in Precambrian |  | | Journal (article/letter/editorial) | | 75, 1980, pp. 296-302 CoexistingCoffiniteand Uraninite in Some Sandstone-Host UraniumOresof Wyoming KENNETH... I. GRAUCH Abstract Coexistingcoffiniteand uraninite appear to be very commonin high-grade,sandstonehost...coffinire and uraninite, is commonly present and probably consistsof submicroscopicmixtures of uraninite and coffiniteor...show the presenceof major Ca and Si in both the uraninite and coffinire but no other major metals besidesU...minerals,and the Si is possiblyin the structure of uraninite as well as that of coffinite. Introduction |  | Guimarães, Frederico Sousa, de Freitas, Monica Elizetti, Rios, Francisco Javier, Pedrosa, Tércio Assunção (2019) Mineralogical characterization and origin of uranium mineralization in Witwatersrand-like metaconglomerate of the Moeda Formation, Quadrilátero Ferrífero, Brazil. Ore Geology Reviews, 106. 423-445 doi:10.1016/j.oregeorev.2019.01.016 | Journal (article/letter/editorial) | | include uraninite, coffinite, brannerite and uranyl arsenates. An early generation of uraninite and brannerite...at the southern sector. A late generation of uraninite formed due to a low-temperature hydrothermal overprint...Fraenkel (1974) described uranium minerals, mainly uraninite, in amorphous hydrocarbon in the Moeda metaconglomerate...According to Raposo (1977), in an unpublished report, uraninite occurs together with organic matter, as overgrowths...interpreting a detrital origin for both pyrite and uraninite. This is in agreement with Renger et al. (1994) |  | | Journal (article/letter/editorial) | | the main ore stages in the veins and intrude the lower strata of the Hornby Bay Group. While diabase intrusions...fine-grained uraninite record isotopic resetting at 1453 ±18 Ma. The δ18O compositions of all uraninite stages...Chondrite-normalized rare earth element data for uraninite produce bellshaped patterns centered on Sm-Dy...element), O isotope, and precise U-Pb analyses of uraninite, coupled with published geochronology of pre-ore...the mineralized fault zone and deposition of lower Hornby Bay Group strata that are comparable to those |  | Fuchs, Sebastian, Williams-Jones, Anthony E., Jackson, Simon E., Przybylowicz, Wojciech J. (2016) Metal distribution in pyrobitumen of the Carbon Leader Reef, Witwatersrand Supergroup, South Africa: Evidence for liquid hydrocarbon ore fluids. Chemical Geology, 426. 45-59 doi:10.1016/j.chemgeo.2016.02.001 | Journal (article/letter/editorial) | | Evidence for liquid hydrocarbon ore fluids Sebastian Fuchs, Anthony E. Williams-Jones, Simon E. Jackson, Wojciech...2016 1 February 2016 Please cite this article as: Fuchs, Sebastian, Williams-Jones, Anthony E., Jackson...30, 30-059 Krakow, Poland Corresponding author: Fuchs CE *Sebastian Email: sebastian.fuchs@mail.mcgill...with the presence of ubiquitous, submicroscopic uraninite in the pyrobitumen documented in an earlier study...migration, the liquid hydrocarbons dissolved detrital uraninite present in the basin, adding to the uranium budget |  | | Journal (article/letter/editorial) | | of the Hagendorf-Pleystein pegmatite province, Germany: with special reference to laser-ablation inductively-coupled...Natural Resources, P.O. Box 510163 D-30631 Hannover, Germany Frankfurt University, Institute of Geosciences...Frankfurt am Main, Germany 3 Bürgermeister-Knorr Str. 8, D-92637 Weiden i.d.OPf., Germany 2 [Received 17...supergene alteration, element recycling, Hagendorf, Germany. Introduction * E-mail: Harald.Dill@bgr.de DOI:...Schwarzach). 372 CU-FE-U PHOSPHATE MINERALIZATION, GERMANY coupled to a New Wave UP213 ultraviolet laser |  | | Journal (article/letter/editorial) | | Petrography and genetic history of coffinite and uraninite from the Liueryiqi granite-hosted uranium deposit...online 1 February 2005 Abstract Coffinite and uraninite banded aggregates from the Liueryiqi granite-hosted...These aggregates consist of concentric bands of uraninite and coffinite that range in thickness from 1 to...indicate that coffinite and uraninite contain Ca and Al impurities. Altered uraninite, feldspar, quartz or pyrite...fluids resulted in the formation of the coffinite–uraninite intergrowth-banded aggregates. The precipitating |  | Szenknect, Stephanie, Mesbah, Adel, Cordara, Théo, Clavier, Nicolas, Brau, Henri-Pierre, Le Goff, Xavier, Poinssot, Christophe, Ewing, Rodney C., Dacheux, Nicolas (2016) First experimental determination of the solubility constant of coffinite. Geochimica et Cosmochimica Acta, 181. 36-53 doi:10.1016/j.gca.2016.02.010 | Journal (article/letter/editorial) | | coffinite, uranium silicate, solubility constant, uraninite, silica, coffinitization. ABSTRACT. Dissolution...infer the relative stability of coffinite and uraninite as a function of groundwater composition. Geochemical...the formation of coffinite from a mixture of uraninite and quartz. The value obtained (∆r,oxG° = 20.6...that coffinite is less stable than the quartz + uraninite mixture at 25°C. Geochemical simulations using...reactors at Oklo and Oklobondo (Gabon), where uraninite, UO2(cr) was observed to be altered to coffinite |  | | Journal (article/letter/editorial) | | (ppm} AA Io. n n ! ).01 A Central Region m~ • Lower PaLaeozoic & I1 I!o 100 %; V ( ppm} AA A AA...and Southwick (Fig. 4), discrete inclusions of uraninite can be identified using electron microscopy (Fig...Carboniferous rocks, whilst other bitumens are derived from Lower Palaeozoic rocks (Parnell 1983 a, 1987). Dysprosium...Carboniferous Coal Measures and (3) a region of Lower Palaeozoic rocks in the south (Fig. 1). The data...fields. The hydrothermal bitumens generally have lower H / C ratios (more thermally altered), and both |  | Melleton, J., Gloaguen, E., Frei, D., Novak, M., Breiter, K. (2012) HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC?. The Canadian Mineralogist, 50 (6) 1751-1773 doi:10.3749/canmin.50.6.1751 | Journal (article/letter/editorial) | | related with the granulite-facies metamorphism of the lower crust. Rather, the magmas could have originated...have proposed that metamorphic processes in the lower crust (e.g., granulite-facies metamorphism) could...pegmatites in this region postdates their exhumation to lower and middle crust levels. Unfortunately, very few...and composed of a Neoproterozoic basement and a Lower Paleozoic cover poor in Variscan magmatic activity...defined: the Drosendorf and Gföhl units (e.g., Fuchs & Matura 1976, Matte et al. 1990, Fiala et al. 1995 |
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