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Orleans, France Geochemical and geochronological data presently available, concerning pitchblende vein-type...vein-type deposits in France, seem altogether too contradictory for use in building a genetic model. Mostly...elements essentially found in mineral deposits of pitchblende with a quartz, clay or calcite matrix, c) Such...have been laid (geochronology U-Pb); d) Veined pitchblende deposits show much analogy in their mineral associations...genetic problem concerning some uraniferous sites in France. There are many advantages in choosing these particular |
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Gdologie de l'Uranium, 54501 Vandoeuvre les Nancy Cddex (France) and E.N.S. de Gdologie Appliqude et de...Prospection Mini~re de Nancy, 54001 Nancy Cddex (France) Section d 'Etudes et d 'Analyse Isotopique et...Nucldaires de Saclay, 91191 Gif-sur-Yve tte Cddex (France) (Received June 7, 1983; accepted for publication...mineralizations (Margnac and Fanay mines, Limousin, France). Chem. Geol., 45: 121--134. Mineralogical and...coffinites from the Margnac and Fanay mines (Limousin, France) indicate that chemical exchanges between uraniferous |
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andFluidInclusions o[the BolsNoirs-LimouzatUranium Vein, Forez, France ]•[ICIIEL CUNEY Abstract The genesisof the Bois...100 to 300 bars) near the brecciazoneswhere pitchblende was deposited.The COnconcentration decreased...Marcasite and pyrite depositionalternatedwith pitchblende. Oxidation of the re- ducedsulfurspeciesin ...conditions of temperature and fluid composition. Pitchblende was transformed to coffinireduring the secondstage...135ø, of hexavalenturaniummineralsand sooty pitchblende. Introduction The Bols Noirs-Limouzatdepositwas |
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Vandoeuvre-lbs-Nancy Cddex (France) CEA/IRDI- SEAIN, CEN Saclay, F-91191 Gif-sur- Yvette Cddex (France) (Received April...deposits from the northwestern Massif Central, France (Margnac-Fanay and Le Bernardan deposits), were...present in the solutions (CO~- or HCO£ with the pitchblende stage at 350°C; HPO~- or other phosphorous anions...The REE content of the newly formed minerals (pitchblende) appears to be mainly controlled in such deposits...n p a r t of t h e M a s s i f C e n t r a l , France. O t h e r similar deposits are k n o w n in this |
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R~sum~ Les min~raux des filons hydrothermaux contenus dans le socle cristallin et dans les s~diments...STSr/86Srqui indiquent une origine continentale du St. Les r~sultats pr~sent~s dans cette note ne permettent...strontianites du Miinsterland). Les min&aux des veines contenues dans les roches s~dimentaires doivent tr~s...contenues dans les roches cristallines moldanubiennes du Bayerische Wald date du PermoTrias. Les rapports initiaux...composition isotopique, fonction du temps, des roches encaissantes. Les filons de la For& Noire, qul traversent |
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Steenfelt (Denmark/Greenland), M. Pagel (France), B. Poty (France), J. Royall (Spain), and A. Kuestermeyer...their magmatic evolution as presented in Chapter 6, France. V. I. Kazansky translated and prepared text and... . . . 159 159 159 159 162 162 162 Chapter 6 France .. . . . . . . . . . . . . . . . . . . . . . ....Subbasin, Allier . . . . . . . . . . . 6.2.4 Aquitaine Basin, Coutras Deposit, Dpt. Gironde . . . . ...Rouges Massif, Western Canton of Valais . . . 18.1.1 Les Marécottes-La Creusa Area . . . . . . . . . . . |
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COPPENS Centre de Recherches Radiog4ologiques, Nancy (France) Le gisement polymdtallique de Kowary (Pologne)...with Uranium. The geochronological study of the pitchblende by Uranium -- Lead method shows that the Uranium...constitu4 par des granites au centre et par des roches m6tamorphiques aux bords. Ce bloc s'est form4 l'dpoque...gneiss, -- micaschistes, - - amphibolites. Ces roches ont des ~ges, soit du Pr4cambrien, soit du Paldozoique...m&amorphique. L'flge absolu de ces granites d4termin4 par les m4thodes K A e t Sr--Rb, est de 306 M.A. (BoRuCKI |
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Depositsof the La CrouzilleDistrict(WesternMassifCentral,France)' GeologicandFluid InclusionStudies JACQUES LEROY...the Margnacminewasapproximately 345øC. A.fter pitchblende deposition, the fluid becameprogressively more...Crouzilleuraniferous district(COGEMA, Haut-Limousin,France) is the main intragranitic 1978). Geologic Setting...plagioclase gneisses, and quartz-feldspar rocks (pitchblende, coffinite,and secondary mineralsof (gneisses...1972,Bourganeuf). MARGNAC AND FANAY U DEPOSITS, FRANCE ('hro..•l•.•v sligll(, (lm (lit't'crcllC(,sill |
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Geology in France and Related Areas (1994) J. D. Keppie (Ed.) Pre-Mesozoic Geology in France and Related...Cataloging-in-Publication Data. Pre-Mesozoic geology in France and related areas / J. D. Keppie (ed.). p.cm.Developed...2. Geology, Stratigraphic-Paleozoic. 3. Geology-France.!. Keppie, J. Duncan. II. IGCP Project 233-Terranes...PreMesozoic Geology of France (Armorican and Central Massifs) and related areas (Aquitaine Basin, Vosges, Crystalline...the international copference held in Montpellier, France, in August, 1988, where a vast amount of new information |
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l'Uranium (CREGU), BP 23, 54501 Vandoeuvre-les-Nancy C~dex, France Ecole Nationale Sup6rieure de G6ologie...Prospection Mini6re de Nancy, BP 452, 54001 Nancy Cddex, France R6sum6. Le gisement d'uranium du Bernardan exploit6...Le quartz est dissout; les feldspaths (principalement les plagioclases) et les biotites sont partiellement...partiellement transform6s en phengites. Les muscovites et orthoses granitiques se r6equilibrent avec perte de...Sylvestre et Hyverneresse darts celui du Millevaches. Les transformations min6ralogiques, ~t l'exception de |
| | Journal (article/letter/editorial) |
de l'uranium dans le Morvan H. G. CaRRAT Nancy, France The main subject of this note is the study of...phase (250 M.Y.), the main concentration of pitchblende veins took place. Thus one is lead to the genetic...d4cisives de la concentration de l'uranium au sein des roches ign4es. Le comportement de cet 614ment s'y montre...thorium dans les roches volcaniques et les granites ~t 6volution calme, se trouve modifi6 d~s les premieres...brutalement accrue. L'uranium se fixe alors dans les zones pr~cocement fractur6es et consolid4es de la |
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(Goni, Buszite Guillemin) Buttgenbach, H. Les Min6raux et les Roches, Etudes Pratiques de Cristallographie...323 Carobbi, G. 848 Petrographie Caroz.zi, A. des Roches Sedimentaires (Book Review) 1034 Carr, D. R. C...Thompson, R. M. A magnesium borate from IsBre, France and Swift River, Yukon Territory, with n-ray powder...calcite marbles 647 Kokkoros,P...... 8 5 1 Les Min6raux et les Roches,Etudes K o w a l k o w s k iR, . . ....Roy) Isdre, Magnesium borate from River, Swift and France Yukon Territorl', with r-ray porvder data for some |
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Port Hope, Ontario. Le texte et les titres de chapitre, ainsi que les caractères gothiques des légendes...Limited est une société de la Couronne dont toutes les actions sont confiées à la garde du ministre du Commerce...mines de la région de Beaverlodge, en Saskatchewan. Les concentrés sont expédiés ensuite à une affinerie...d'uranium, mais elle inclut aussi l'uranium métal et les alliages sous forme de lingots façonnés, de profilés...valeur et un personnel des ventes. A ses débuts dans les années 1920, l'Eldorado était une société privée |
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with the uranium-lead-method, first applied to pitchblende, was introduced by Holmes as early as 1913. The...Ivrea-Ceneri zones, Southern Alps (Italy) Velay (France) paragneiss Velay orthogneiss 311 * 13 3195 11...Monte1 et al. (1994) Besides uraninite and pitchblende, which are restricted in occurrence, the most...l’uranium B 1’6tat de traces dans les roches granitiques saines les uranites a teneur ClevCe du Massif |
| | Report (issue) |
....... 39 2.5.2. Geologic setting of Margnac, France and Jáchymov, Czech Republic deposits............3. Ore geometry and metallogenesis of Margnac, France and Jáchymov, Czech Republic deposits............4. Uranium resources and production in Margnac, France and Jáchymov, Czech Republic deposits............ Examples include the deposits of Mas Laveyre (France) and Mikouloungou (Gabon). 5 3. Hematite breccia...material, mainly pitchblende. Typical examples range from the thick and massive pitchblende veins of Pribram |
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the Swiss/kips are noted in a geological map. Pitchblende is the most important uranium ore mineral to...substantially higher than that of thorium. R6sum6 Les gisements d'uranium des Alpes suisses trouv6s au...d'uranium le plus important. Les roches min6ralis6es telles que les schistes et les gneiss ~ chlorite et s6ricite...effeetu6es sur plnsieurs tonnes d'6chantillons. Les r6sultats obtenns sont repr6sent6s sons forme de...de tableaux et d'un graphique. Dans les roches m6tamorphiques et min6ralisSes la teneur en uranium est |
| | Journal (article/letter/editorial) |
examples Alps 1 and Alps 2 relate to uraninite and pitchblende in the same thin section. The older age of 265...Europe. The younger age ( 19 Ma) relates to pitchblende in a cross-cutting feature in the section and...the Hercynian massifs underlying the Alps and pitchblende formed following movement and recrystallisation...l'uranium h l'6tat de traces dans les roches granitiques saines les uranites/l teneur 61ev6e du Massif...metamorphism of reaction zone samples from Okto. In: Les r6acteurs de fission naturels. I.A.E.A. (Int. At |
| | Report (issue) |
Spain.............................................. France............................................. England...minerals (pitchblende and uraninite) occur either in extensive bedded deposits of pitchblende in sedimentary...silicic intrusions in orogenic belts (e.g., Spain, France, Bohemian Massive, and Colorado Rockies); (4) in...Massif; Vosges vein deposits of Massif Central, France; and vein deposits of Spanish Meseta, Portugal)...U308. See table 1. 11 USA 47% 161,214 (209,559 France and associates 6% 27,853)121,427 South Africa |
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Géologie appliquée à l'Ecole des Mines de Paris, France with a Foreword by C. E. WEGMANN Translated...proportions within the compass of an outcrop, a quarry, a cliff face, or even a mass of greater extent...characteristically found in the crystallophyllian1 rocks (roches cristallophylliennes) of metamorphism. Furthermore...sketches of embrechites of the SaintEtienne region of France given by A. Demay (1942) illustrate some similar...Mont Aigoual granite, Cévennes, in the south of France, where the shoving aside of the schist layers is |
| | Report (issue) |
crystals. Other uranium-bearing minerals are sooty pitchblende, a complex U-Ti oxide, allanite, xenotime, davidite...Jaduguda-Bhatin sector. The dominance of uraninite over pitchblende, the presence of several percents of REE in uraninite...the principal uranium mineral. Near surface pitchblende is common together with autunite (metaautunite)...FW orientated, sinistral stress system. The pitchblende veins and the many minor radioactive mineral...with fault zones. U-Pb isotope analyses of the pitchblende indicate a Gardar age of 1180 j^ 15 Ma. In the |
| | Journal (article/letter/editorial) |
commonly refer to its low-temperature variety pitchblende. Most studies of uraninite composition have the...are the major source of uranium that occurs in pitchblende veins in the granite margins and country rocks...27l _ 7 Ma as implied by U-Pb ages of primary pitchblende from the Schlema-Alberoda vein-type deposit (F6rster...and some late-Variscan granites from the Vosges, France (Pagel, 1982a), the Harz Mts., Germany (Brocken...mkthodes de prospection de l'uranium; Symposium sur les m~thodes de prospeetion de l'uranium - - examen dur |
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Coste A. (Limousin, France), Cuney M. (granites, France), Dardel J.RM. (France), Ewers G. (Pine Creek...Uranium Deposits: Limousin/La Crouzille District, France. . . . . . . . . . . . . . . . . . . . . . . ....but also in vein and veinlike-type deposits. "Pitchblende" is used for U0 2 + x varieties of micro- or...Uraninite Pitchblende or or Euhedral (subhedral) uraninite Colloform uraninite Sooty pitchblende or Sooty...press; Ramdohr 1980, and Sect. 2.3.1). The term pitchblende has been maintained for traditional reasons. |
| | Book (volume) |
Emberger and the following national chapters: France and Luxembourg by J. Bouladon Spain by F. Vazquez...Romania and Yugoslavia; and Southwest Europe embraces France, Spain, Portugal and Italy. Each volume has an...of large sedimentary basins Conclusions 30 31 France and Luxembourg by J. Bouladon Introduction 37...Basin (including Lorraine and Luxembourg) and Aquitaine Basin (zone E) Iron. Sulphur Gypsum and anhydrite...this introduction, comprises the territories of France, Luxembourg, Italy, Spain and Portugal. It covers |
| | Report (issue) |
which displaces the Athabasca Formation. Oldest pitchblende ages are about 1,285 m.y., (Gumming and Rimsaite...marked by alternating stages of hematite and pitchblende with sulfides (Hoeve and Sibbald, 1978). Alteration...(probably Fe-rich) after mafics precedes early pitchblende. This stage was followed by a period of magnesium...formed with middle-stage pitchblende and coffinite. A late stage of sooty pitchblende and coffinite occurs...quartz, somewhat earlier than middle-stage pitchblende, have filling temperatures in the range 135 to |
| | Journal (article/letter/editorial) |
crystallised grains at higher and a botryoidal variety (pitchblende) at lower temperatures. It can host a number...than low-temperature, hydrothermal uraninite (pitchblende), i.e. as much as generally 615 wt% ThO2 as opposed...deposits from the Amorican Massif and Massif Central (France), we analysed uraninite grains from 14 further...Germany; scale bar = 1 cm; (E) BSE images of pitchblende from Jáchymov, scale bar = 200 lm; (F) massive...beryl, bertrandite and at least in one locality (a quarry near the village of Dörrmorsbach) also uraninite |