caa a22 4500 465791255 CHVBK 20180323112025.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00306440 doi (NATIONALLICENCE)springer-10.1007/BF00306440 Meta-igneous origin of Hercynian peraluminous granites in N.W. French Massif Central: implications for crustal history reconstructions [Elektronische Daten] [Laurent Turpin, Michel Cuney, Marc Friedrich, Jean-Luc Bouchez, Monique Aubertin] Seventy samples of Hercynian peraluminous granites (Guéret, Millevaches and Saint Sylvestre massifs) and metamorphic units of the Limousin area were analysed for Rb−Sr and Sm−Nd. The source rocks of the peraluminous granites can be found in the metamorphic rocks of Limousin, among them meta-igneous rocks were largely predominent over meta-sedimentary rocks in the source of the three granites. Millevaches and Guéret granites were generated by the partial melting of rocks comprising meta-volcanics and meta-sediments, whereas the Saint Sylvestre granite was produced exclusively by the melting of late Precambrian granites. This leads to confusing T DM Nd values, the confusion being amplified by the segregation of monazite during the petrogenetic evolution of the peraluminous granites, which leads to dramatic fractionation in Sm/Nd ratios. The data of the present study tend to demonstrate that peraluminous granites do not give a good representation of isotopic mean crustal estimates. Late Precambrian time seems, however, to have been a period of extensive crustal generation in Western Europe. Springer-Verlag, 1990 Turpin Laurent Centre d'Etudes Nucléaires Valrho, DEAEA-SEA, B.P. 171, F-30205, Bagnols-sur-Cèze, France aut Cuney Michel CREGU G.S. CNRS-GREGU, B.P. 23, F-54501, Vandoeuvre Cedex, France aut Friedrich Marc CREGU G.S. CNRS-GREGU, B.P. 23, F-54501, Vandoeuvre Cedex, France aut Bouchez Jean-Luc Laboratoire de Pétrophysique et Tectonique, Université Paul Sabatier, 38, Rue des Trente-Six Ponts, F-34000, Toulouse, France aut Aubertin Monique Section d'Analyses Isotopiques et Nucléaires, CEA/IRDÍ, Bâtiment 391, CEN, Saclay, F-91191, Gif sur Yvette, France aut Contributions to Mineralogy and Petrology Springer-Verlag 104/2(1990-02-01), 163-172 0010-7999 104:2<163 1990 104 410 https://doi.org/10.1007/BF00306440 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00306440 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Turpin Laurent Centre d'Etudes Nucléaires Valrho, DEAEA-SEA, B.P. 171, F-30205, Bagnols-sur-Cèze, France aut NATIONALLICENCE 700 1- Cuney Michel CREGU G.S. CNRS-GREGU, B.P. 23, F-54501, Vandoeuvre Cedex, France aut NATIONALLICENCE 700 1- Friedrich Marc CREGU G.S. CNRS-GREGU, B.P. 23, F-54501, Vandoeuvre Cedex, France aut NATIONALLICENCE 700 1- Bouchez Jean-Luc Laboratoire de Pétrophysique et Tectonique, Université Paul Sabatier, 38, Rue des Trente-Six Ponts, F-34000, Toulouse, France aut NATIONALLICENCE 700 1- Aubertin Monique Section d'Analyses Isotopiques et Nucléaires, CEA/IRDÍ, Bâtiment 391, CEN, Saclay, F-91191, Gif sur Yvette, France aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 104/2(1990-02-01), 163-172 0010-7999 104:2<163 1990 104 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer