 | | Journal (article/letter/editorial) | | Granulite-Facies Orthogneisses at La Picherais, Southern Armorican Massif, France Ph. Vidal 1, J.J. Peucat 1...(CNRS), Instimt de G6ologie, Universit6 de Rennes, 35042 Rennes Cedex, France 2 Laboratoire de P6trologie...Min6ralogie, U.E.R. des Sciences de. la Nature, 44037 Nantes Cedex, France Abstract. Situated within the...the orthogneiss of La Picherais (near St Mars-du-D6sert, Loire Atlantique, France) show relicts of a...yields an errorchron of 570 + 110 m.y. for the Picherais orthogneiss, whereas the U-Pb zircon method indicates |  | Bosse, Valerie, Feraud, Gilbert, Ruffet, Gilles, Ballèvre, Michel, Peucat, Jean-Jacques, De Jong, Koen (2000) Late Devonian subduction and early-orogenic exhumation of eclogite-facies rocks from the Champtoceaux Complex (Variscan belt, France) Geological Journal, 35 (3) 297-325 doi:10.1002/gj.864 | Journal (article/letter/editorial) | | rocks from the Champtoceaux Complex (Variscan belt, France) VALERIE BOSSE,1* GILBERT FERAUD,1 GILLES RUFFET...JEAN-JACQUES PEUCAT 2 and KOEN DE JONG3 1 GeÂosciences Azur (UMR-CNRS 6526), Universite de Nice-Sophia Antipolis...Antipolis, Nice, France 2 GeÂosciences Rennes (UPR-CNRS 4661), Universite de Rennes, France 3 Geological Survey...Department, Tsukuba, Ibaraki, Japan In order to de®ne the mechanisms involved during exhumation of the...from the Champtoceaux Complex (Armorican Massif, France), Sm-Nd, Rb-Sr and 40Ar/39Ar methods are combined |  | | Journal (article/letter/editorial) | | I TUDE PAR LA MI THODE Pb-Pb DE ROCHES DE HAUT GRADE MI TAMORPHIQUE IMPLIQUi ES DANS LA CHA'iNE HERCYNIENNE...HERCYNIENNE PHILIPPE VIDAL et BENOfT POSTAIRE Laboratoire de Chronologie des Terrains Cristallins et Volcanologie...du C.N.R.S. (Centre National de la Recherche Scientifique), Universitd de Clermont II, F-63038 Clermont-Ferrand...Clermont-Ferrand Cedex (France) C.A.E.S.S. (Centre Armoricain d'~tude Structurale des Socles), C.N.R.S. (Centre...(Centre National de la Recherche Scientifique), F-35042 Rennes (France) (Requ le 3 octobre, 1983; r6vis6 |  | | Journal (article/letter/editorial) | | Champtoceaux Nappe (Brittany, France) 1 2 Laboratoire de tectonique, CAESS, Universite de Rennes I, 35042 Rennes...Rennes Cedex, France Laboratoire de pe'trologie metamorphique, U.A. C.N.R.S. 727, Universite Paris VII,... 75230 Paris Cedex 05, France (Received 29 June 1988; revised typescript accepted 24 January 1989) ABSTRACT...micaschists from the Champtoceaux nappe (Brittany, France) is first described. The Champtoceaux metapelites...relations between garnet, staurolite, chloritoid, biotite, and chlorite are analysed in the K.FMASH system |  | | Journal (article/letter/editorial) | | Netherlands ORIGIN OF ECLOGITES FROM SOUTH BRITTANY,FRANCE: A Sm-Nd ISOTOPICAND REE STUDY J. BERNARD-GRIFFITHS...Socles, Znstitut de Ge’ologie, for publication December 35042 Rennes Ce’dex (France) 12, 1984) Abstract...Chem. Geol. (Isot. Geosci. Sect.), 52: 185-201. France: A Sm-Nd Geochemistry and Rare-earth element (REE)...Armorican massif in the Hercynian fold-belt of western France. The REE distribution patterns suggest that: (1)...western part of the Hercynian belt in south Brittany, France, contains eclogitefacies rocks exposed in a 600-km |  | | 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...comprehensive account of the PreMesozoic Geology of France (Armorican and Central Massifs) and related areas...the international copference held in Montpellier, France, in August, 1988, where a vast amount of new information |  | Maurel, O., Monié, P., Respaut, J.P., Leyreloup, A.F., Maluski, H. (2003) Pre-metamorphic 40Ar/39Ar and U–Pb ages in HP metagranitoids from the Hercynian belt (France) Chemical Geology, 193 (3) 195-214 doi:10.1016/s0009-2541(02)00351-0 | Journal (article/letter/editorial) | | ages in HP metagranitoids from the Hercynian belt (France) O. Maurel *, P. Monié, J.P. Respaut, A.F. Leyreloup...Pace E. Bataillon, 34095 Montpellier Cédex 05, France Received 11 February 2002; accepted 7 October 2002...Pb ion probe methods. In both cases, 40Ar/39Ar biotite and U – Pb zircon ages are consistent and could...that normally estimated for argon retention in biotite, but failed to cause significant resetting of the...metamorphic garnet fringing biotite. By contrast, a complete resetting of biotite ages occurs in gneisses |  | | Journal (article/letter/editorial) | | Castro Departamento de Geologla y Mineria, Universidad de Sevilla, E-21819 Palos de la Frontera, Huelva...transitions from cordierite-bearing facies through biotite-bearing facies to amphibole-bearing facies; (2)...xx~xxxxx~ . ! ~ x g x x g x x x Biotite-hornblende granodiorites Biotite granodiorites Cordierite granodiorites...granodiorites, which, in turn, are transitional to biotite monzogranites and finally to cordierite monzogranites...microgranular enclaves and rich in restitic spots of biotite, quartz, plagioclase and silimanite. These have |  | | Journal (article/letter/editorial) | | Socles, CNRS, Universite; de Rennes, Campus de Beaulieu, 35042 Rennes Cedex (France) (Received August 16...650 and 550 Ma. Much older relicts occur at Cap de la Hague, in Guernsey and in the Tregor, and are also...This phase was marked by dioritic (St Quay, Fort-la-Latte) and granodioritic intrusions (Mancellian batholiths)...Brioverian and the structurally older Coetmieux--Fort-la-Latte dioritic gneisses. These gneisses were therefore...whole rock Rb-Sr age of 583 + 40 Ma and a Rb-Sr biotite age of 564 Ma (Vidal et al., 1972). These ages |  | | Journal (article/letter/editorial) | | 6009, 45060 Orléans, France Université d·Orléans, ISTO, BP 6759, 45067 Orléans, France 3 Research School...(Armorican Massif) The Armorican Massif in Western France formed mainly as a result of the Variscan orogeny...over an underlying unit of augen orthogneiss and biotite-muscovite paragneiss (Faure et al. 2001). South...thrusting was followed by crustal melting producing biotite-sillimanite migmatite and granite, which are well...métamorphisme éclogitique dans la nappe de Champtoceaux (massif Armoricain, France). Comptes Rendus Acadamie |  | | Journal (article/letter/editorial) | | PRIEM Z.W.O. Laboratorium voor Isotopen-Geologie, De Boelelaan 1085, 1081 H V Amsterdam (The Netherlands)...late Pale0zoic intrusions (Capdevila et al., 1973; de Albuquerque, 1978} and the early Paleozoic precursors...of the catazonal complexes are mainly garnet--biotite gneisses, locally with minor kyanite. Their sedimentary...have shown that (at least) part of the garnet--biotite gneisses constitute residues of partial melting...intrusion of a mafic dike swarm: an older suite of biotite granodiorites of calc-alkaline character and a |  | Sun, Min, Armstrong, Richard Lee, St. J. Lambert, Richard (1992) Petrochemistry and Sr, Pb, and Nd isotopic geochemistry of early precambrian rocks, Wutaishan and Taihangshan areas, China. Precambrian Research, 56 (1) 1-31 doi:10.1016/0301-9268(92)90081-x | Journal (article/letter/editorial) | | body, the Fengkuangshan Granite, yields a K-Ar biotite date of 1810+29 Ma (Bai, 1986). An age of 1.9 Ga...granulite-facies orthogneisses at la Picherais, Southern Armorican Massif, France. Contrib. Mineral. Petrol....Longitude Amphibolite Amphibolite; biotite around hornblende Amphibolite; biotite around hornblende Wutai Complex...Hebei Same as above Same as above Same as above Biotite-hornblende-plagioclase amphibolite Plagioclase |  | | Book | | Laboratoire de Geophysique et Geodynamique, case 422 Faculte des Sciences et Techniques de St. Jerome...Universite d'Aix-Marseille 3 13397 Marseille Cedex 13 France ISBN-13: 978-3-642-84155-2 e-ISBN-13: 978-3-642-84153-8...Techniques de St. Jerome, Universite d'Aix-Marseille 3, 13397 Marseille Cedex 13, France Fig.1. The...Laboratoire de Geophysique Universite d'Aix-Marseille 3 13397 Marseille Cedex 13, France ' 2 Centre Geologique...Techniques du Languedoc, 34060 Montpellier Cedex, France 1 ing mobile belts, largely of Upper Proterozoic |
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