 | Turpina, Laurent, Clauer, Norbert, Forbes, Pierre, Pagel, Maurice (1991) UPb, SmNd and KAr 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) | | Cedex, France “Centre de Geochimie de la Surface, 1 Rue Blessig, F-6 7084 Strasbourg Cedex, France de Recherches...Cedex, France ?%ole Nationale Superieure des Mines de Paris, C.G.G.M., F- 75272 Paris Cedex, France (Received...Rhone, B.P. 17 I, F-30205 Bagnols-sur-Ceze Cedex, France. 0168-9622/9 l/$03.50 0 199 1 Elsevier Science...- 4. Results 221 DEPOSIT determined on the galena sample 2056, taken 11 km from the deposit in the...= 0.56%)) very closeto the 208Pb/204Pb ratio of galena 2056 (39.06 + 0.04). This similarity validates |  | | Journal (article/letter/editorial) | | 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...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...150 ° C (Leroy, 1978). Thanks to tiny crystals of galena formed during the transformation of the pitchblende...G~ologie de l'Uranium (CREGU) of Nancy-Vandoeuvre (France). The authors would like to express their gratitude |  | | Book | | 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 |  | | Report (issue) | | (CREGU) M Cuney B Poty (Joint project leaders, France) A Bourguignon M Brouand M Friedrich B Guineberteau...and AJ W McDonald 3 1 The Western Marche granite, France 3.3 J L Vigneresse and M Cuney 54 The Fichtelgebirge...mineralisation asso ciated with the Marche granites of France and the Fichtelgebirge granites of Gennany are...in L - type granites with the exception of the Piegut 2.2.5 OtSTRl8UTION OF VARISCAN MINERALISATION...shown that many Variscan Sn, W and U deposits in France, Portugal and Spain are genetically related to |  | | Journal (article/letter/editorial) | | uraninite but also associated minerals (pyrite, galena, and even clays), and so, it does not represent...investigation of the Piegut uranium deposit (Marche, Northwest Massif Central, France): U series disequilibrium |  | | Report (issue) | | type + epidote magnetite Re-mobilised radiogenic galena, chlorite, hematite and FeOOH hydrothermal stage...uranium secondary phases and remobilized radiogenic galena (white) commonly forms a matrix cement. Reflected...ppm), and is mainly a sulphide mineralization with galena and bornite and some digenite, covellite, chalcopyrite...pitchblende frequently contain small grains of galena which is probably radiogenic in origin. It is associated...common sulphide mineral with some chalcopyrite and galena. Semi-quantitative electron microprobe analyses |  | | 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...stockworks and episyenite columns of Bernardan (France) and Gunnar (Canada), to the narrow cracks in granite |
|
