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Journal articles on the topic 'Magmatisme – France – Massif central (France)'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Briand, Bernard, Jean-Luc Bouchardon, Houssa Ouali, Michel Piboule, and Paul Capiez. "Geochemistry of bimodal amphibolitic—felsic gneiss complexes from eastern Massif Central, France." Geological Magazine 132, no. 3 (May 1995): 321–37. http://dx.doi.org/10.1017/s0016756800013637.

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AbstractHigh-grade basic and acidic meta-igneous rocks are widespread in the bimodal amphibolitic—felsic gneiss complexes, which are characteristic formations of the ‘Middle Allochthonous Unit’ from eastern and southern French Massif Central. The metabasites from the Lyonnais and Doux complexes are chemically diverse and range from N-MORB type tholeiitic to transitional types. The two populations are not related by fractional crystallization or crustal contamination processes and their chemical characteristics reflect differences in their mantle sources. An ensialic setting is supported by the crustally-derived character of some of the associated felsic rocks, but the presence of N-MORB-type metabasites argues for an extensional environment. This bimodal association compares well with the magmatism of rifted continental margins and may reflect a transitional stage between continental rifting and oceanic crust formation during the Cambro-Ordovician spreading event.

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2

Caroff, Martial, Hervé Bellon, Louis Chauris, Jean-Paul Carron, Stéphane Chevrier, Alain Gardinier, Joseph Cotten, Yann Le Moan, and Yseult Neidhart. "Magmatisme fissural triasico-liasique dans l'ouest du Massif armoricain (France): pétrologie, géochimie, âge, et modalités de la mise en place." Canadian Journal of Earth Sciences 32, no. 11 (November 1, 1995): 1921–36. http://dx.doi.org/10.1139/e95-147.

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The dolerite dykes at the western end of Britanny (France), which is located on the North Atlantic margin, were emplaced in a NW–SE field of faults at the Trias–Lias time limit, between 210 and 195 Ma. These rocks are quartz tholeiites enriched in TiO2, with a trace element composition close to that of the Deccan basalts. The initial concentrations of Ba, K, and Rb, though slightly modified by the alteration, and of Nb seem to have been affected by crustal contamination during the magma transfer. These dykes are comparable, in age and composition, to the tholeiitic dykes exposed in the Iberian Peninsula, in the Moroccan Atlas and in the Northern Appalachians; they however have a different orientation. Furthermore, these various domains differ in their postintrusion history: the rifting leading to the opening of the Central Atlantic occurred soon after the intrusions of the dykes, whereas the opening of the North Atlantic began several tens of millions of years later, following the direction of the Armorican array of dykes. The study of the mode of emplacement of the intrusions shows evidence of two sets of dykes: "simple dikes", 5 to 10 m thick, resulting from a single magmatic injection and "multiple dykes", about 30 m thick, composed of five magmatic units that are individually 5 to 10 m wide. The western Armorican dyke field is the result of the intrusion of successive sets of dolerite having a uniform thickness and composition, suggesting a cyclic magmatic supply from homogeneous source. [Journal Translation]

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3

Gébelin, Aude, Maurice Brunel, Patrick Monié, Michel Faure, and Nicolas Arnaud. "Transpressional tectonics and Carboniferous magmatism in the Limousin, Massif Central, France: Structural and40Ar/39Ar investigations." Tectonics 26, no. 2 (March 27, 2007): n/a. http://dx.doi.org/10.1029/2005tc001822.

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4

Oliot, Emilien, Jérémie Melleton, Julie Schneider, Michel Corsini, Véronique Gardien, and Yann Rolland. "Variscan crustal thickening in the Maures-Tanneron massif (South Variscan belt, France): new in situ monazite U-Th-Pb chemical dating of high-grade rocks." Bulletin de la Société Géologique de France 186, no. 2-3 (2015): 145–69. http://dx.doi.org/10.2113/gssgfbull.186.2-3.145.

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AbstractAge constraints on the protoliths, deformation, metamorphism and melting events are key parameters when correlating different continental lithospheric remnants among each other and disentangling their evolution within large-scale orogens. In situ U-Th-Pb chemical dating on monazites using Electron Probe Micro-Analyser (EPMA) has been performed on eight samples throughout the Variscan Maures-Tanneron massif (SE France) in order to date the medium to high-tectonothermal events related to the Variscan orogeny.Results indicate a polyphased crustal evolution : (i) U-Th-Pb ages obtained in polygenetic monazite grain cores gave inherited Upper Ordovician (456 ± 11 Ma) age, highlighting the large scale occurrence of the Ordovician magmatic activity in the North Gondwanian margin. An Early Devonian (404 ± 10 Ma) age may date a protolith emplacement related to calc-alkaline supra-subduction magmatism or could be associated to an early medium-grade metamorphism, prior to collisional stage. (ii) The crustal thickening stage has been further recorded in prograde metamorphic monazites formed during the underthrusting and subsequent nappe stacking events, under amphibolite facies conditions. This stage is dated between 382 ± 11 (Middle Devonian) and 331 ± 5 Ma (Late Visean). (iii) An orogenic partial melting event took place during Middle Carboniferous and is accompanied by the crystallization of crustal peraluminous magmas (Plan-de-la-Tour granite, 329 ± 3 Ma).This contribution demonstrates the capacity of monazite to record the prograde path of rocks during increasing metamorphic conditions related to stages of crustal thickening, and the robustness of the U-Th-Pb chronometer in monazite despite the overprinting of high-grade thermal events, including partial melting. The age ranges of the different orogenic stages reported in this study are in good agreement with those reported in adjacent Variscan Corsica and Sardinia; while correlations with other nearest Variscan massifs like the Argentera massif in the southwestern Alps or the French Massif Central remain more hypothetic. The Internal Zone of the Maures-Tanneron massif, and more widely the Internal Zone of the Maures-Tanneron-Corsica-Sardinia segment, is part of the southern orogenic root system of the Variscan belt.

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5

Caroff, Martial, and Joseph Cotten. "Geochemical evolution of a 10 m-thick intrusive body: the South Brenterch diabase dyke, Western Armorican Massif, France." Canadian Journal of Earth Sciences 41, no. 7 (July 1, 2004): 775–84. http://dx.doi.org/10.1139/e04-030.

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The South Brenterch 9.5 m-thick diabase dyke belongs to the intermediate-Ti quartz-normative tholeiitic magmatism, which has intruded the western end of Britanny (France) near the Trias-Lias boundary. It has been previously identified as a "simple" dyke, resulting from a single magmatic injection. The present study is based on ten samples collected along a half transverse section of this dyke. Geochemical analyses and some textural parameters have been used to point out two flow-related differentiation processes, partially masked by alteration. These late magmatic mechanisms have induced subtle geochemical variations among samples, which sometime counteract each other. The processes pointed out here are (i) expulsion of phenocrysts from the borders during flow differentiation, likely by the way of an hydrodynamic grain dispersive pressure, and (ii) emplacement of a more evolved magma in the central part of the intrusion, probably due to a viscosity segregation mechanism during the flow.

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6

Pin, C. "Le magmatisme basique calcoalcalin d'âge dévono-dinantien du nord du Massif Central, témoin dˈune marge active hercynienne : arguments géochimiques et isotopiques Sr/NdSr-Nd isotope and trace element evidence for a Late Devonian active margin in northern Massif-Central (France)." Geodinamica Acta 15, no. 1 (March 2002): 63–77. http://dx.doi.org/10.1016/s0985-3111(01)01079-8.

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7

Harlaux, Matthieu, Christian Marignac, Julien Mercadier, Marc Poujol, Marie-Christine Boiron, Kalin Kouzmanov, Alfredo Camacho, et al. "Multistage development of a hydrothermal W deposit during the Variscan late-orogenic evolution: the Puy-les-Vignes breccia pipe (Massif Central, France)." BSGF - Earth Sciences Bulletin 192 (2021): 33. http://dx.doi.org/10.1051/bsgf/2021023.

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The Puy-les-Vignes W deposit, located in the northwestern French Massif Central (FMC), is a rare occurrence of a wolframite-mineralized hydrothermal breccia pipe hosted in high-grade metamorphic gneisses. We present an integrated study of this deposit aiming to characterize the ore-forming hydrothermal system in link with the Variscan late-orogenic evolution of the FMC. Based on a set of representative samples from the host rocks and mineralization, we describe a detailed paragenetic sequence and we provide the major and trace element geochemistry of the granitic rocks and W–Nb–Ta–Sn–Ti oxide minerals, in situ U/Pb and 40Ar/39Ar geochronology, and a fluid inclusion study of quartz and wolframite. We demonstrate that the formation of this W-mineralized breccia pipe results from a multistage development related to four major episodes during the late Carboniferous. The first episode corresponds to the emplacement of an unexposed peraluminous granite at ca. 324 Ma, which generated microgranite dykes exposed at the present-day surface. The second episode is the formation of the quartz-supported breccia pipe and wolframite mineralization at ca. 318 Ma at a paleodepth of 7 km. The mineralizing fluids have a H2O–NaCl–CO2–CH4–N2 composition, a moderate-salinity (< 9 wt.% NaCl eq) and were trapped at high-temperatures (> 400 °C) during lithostatic to hydrostatic pressure variations caused by hydrofracturing of the host rocks. Wolframite deposition is interpreted to result from a W-rich intermediate-density magmatic fluid that exsolved from an evolved leucogranite and interacted with volatile-rich metasedimentary country rocks and/or possibly mixed with low-salinity metamorphic fluids of deep origin. The third episode corresponds to magmatic-hydrothermal Nb–Ta mineralization overprinting the W-mineralized system interpreted to be related to the intrusion at ca. 311 Ma of a rare-metal granite, which is part of a regional peraluminous rare-metal magmatism during the 315–310 Ma period. Finally, the last episode corresponds to disseminated Bi ± Au–Ag mineralization emplaced at ca. 300 Ma, which shares similar mineralogical features with late Carboniferous orogenic gold deposits in the FMC. The Puy-les-Vignes W deposit records, therefore, a multistage and long-lived development that extends over a timespan of 25 million years in a regional setting dominated by protracted peraluminous magmatism and high-temperature and low-pressure metamorphism. Although the local environment of ore deposition is atypical, our results show that the mineral assemblages, alteration styles, and fluid characteristics of the Puy-les-Vignes breccia pipe are similar to those of other peri-granitic W deposits in the FMC.

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8

Ducassou, Céline, Marc Poujol, Erwan Hallot, Olivier Bruguier, and Michel Ballevre. "Petrology and geochronology of the high-K calc-alkaline Mésanger magmatism (Armorican massif, France): a ca. 320 Ma old volcano-plutonic association." Bulletin de la Société Géologique de France 182, no. 6 (November 1, 2011): 467–77. http://dx.doi.org/10.2113/gssgfbull.182.6.467.

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Abstract The late stages of the Variscan orogeny in western and central Europe are characterized by the emplacement of numerous Carboniferous granitic intrusions. In the southern part of the Armorican massif, volcanic and plutonic rocks occur within the Carboniferous series of the Ancenis basin. Chemical analyses indicate that they belong to the same magmatic high-K calc-alkaline association of peraluminous composition, which likely derives from crustal melting of an igneous source. A LA-ICPMS U-Pb/zircon age of 319.3 ± 3.1 Ma dates, for the first time, this magmatic event and, by there, constrains the maximum age of both the end of the sedimentation and the northward tilting of the sediments in the Ancenis basin. This magmatic event is coeval with the sedimentation of the coal-bearing Namurian basins located along the Nort-sur-Erdre fault. These intrusions are interpreted as the feeding conduits of the volcano-sedimentary layers encountered in these basins. This would imply a minimal dextral displacement of ca. 20–25 km along the Nort-sur-Erdre fault.

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9

Guillot, François, Olivier Averbuch, Michel Dubois, Cyril Durand, Pierre Lanari, and Arnaud Gauthier. "Zircon age of vaugnerite intrusives from the Central and Southern Vosges crystalline massif (E France): contribution to the geodynamics of the European Variscan belt." BSGF - Earth Sciences Bulletin 191 (2020): 26. http://dx.doi.org/10.1051/bsgf/2020027.

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To provide a better picture of the active geodynamics along the Variscan suture zones during the late collisional stage (particularly regarding the evolution of the orogenic system towards HT conditions), we focused here on vaugnerites, which consist of mafic ultra-potassic magmatic rocks, intrusive into the granite-gneiss sequences of the Variscan Vosges crystalline massif. Those rocks, though subordinate in volume, are frequently associated with late-collisional granites. In the Central-Southern Vosges, they appear either as (1) pluton margin of the Southern Vosges Ballons granite complex or (2) composite dykes intrusive into migmatite and metamorphic sequences classically referred to as granite-gneiss unit (Central Vosges). Both types correspond to melanocratic rocks with prominent, Mg-rich, biotite and hornblende (20–40% vol., 64 < mg# < 78), two-feldspar and quartz. Those Vosges vaugnerites display geochemical signatures characteristic of ultra-potassic mafic to intermediate, metaluminous to slightly peraluminous rocks. Zircon U-Pb ages were obtained by Laser Ablation Inductively Coupled Plasma Mass Spectrometry. Zircon grains were extracted from a sillimanite-bearing gneiss from the granite-gneiss unit hosting the Central Vosges vaugnerites. They yielded an age at 451 ± 9 Ma, indicating a pre-Variscan Upper Ordovician protolith for the host sequence. Zircon from the four vaugnerite intrusives display U-Pb ages (± 2σ) of 340 ± 2.5 Ma (Ballons), 340 ± 25 Ma, 340 ± 7 Ma and 336 ± 10 Ma (Central Vosges). Synchronous within uncertainty, vaugnerite age data suggest a relatively early emplacement during the Late Variscan collisional history (i.e. Middle Visean times). These results are in line with previously published ages from the Southern Vosges volcano-sedimentary sequences (Oderen-Markstein) and the nearby ultra-potassic granite complexes from the Central and Southern Vosges (Ballons, Crêtes) thereby arguing for a magmatic event of regional significance. Recent petrological studies on vaugnerites suggest that they derive from partial melting of a metasomatized mantle contaminated to some different degrees by elements of continental crust. We propose here that the major ultra-potassic magmatic pulse at 340–335 Ma is a consequence of a significant change into the dynamics of the Rhenohercynian subduction system below the Central-Southern Vosges. In the light of recent thermo-mechanical modelling experiments on mature continental collision, magmatism could result from a syn-collisional lithospheric delamination mechanism involving (1) first, continental subduction evolving towards (2) the underthrusting of the Avalonian continental margin lower crust and (3) the initiation of lithospheric delamination within the supra-subduction retro-wedge (Saxothuringian-Moldanubian continental block). This delamination would drive the emplacement of an asthenospheric upwelling, initially localized along the Variscan suture zones, and gradually propagating towards the southern front of the belt during the Late Carboniferous, as the delamination front migrated at the base of the crust.

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10

Najoui, Khalid, Andre Francois Leyreloup, and Patrick Monie. "Conditions et ages 40 Ar/ 39 Ar de mise en place des granitoides de la zone externe sud du Massif central francais; exemple des granodiorites de St-Guiral et du Liron (Cevennes, France)." Bulletin de la Société Géologique de France 171, no. 5 (September 1, 2000): 495–510. http://dx.doi.org/10.2113/171.5.495.

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Abstract The St-Guiral and the Liron laccolithic granodiorites outcropping in the southeastern area of the French Massif Central intrude the Cambro-Ordovician low grade series of the western Cevennes. The petrological study of their contact aureoles shows that these plutons emplaced at low depth (1-2 kb; 690-700 degrees C). The laser probe 40 Ar/ 39 Ar allows us to suggest a minimum age of 324 Ma for the emplacement of the St-Guiral granodiorite. This emplacement seems synchronous with the LP-HT regional metamorphism in the western Cevennes for which the cooling ages are identical. The Liron granodiorite (310 Ma) is younger and crosscuts the thermal structures of the LP-HT regional metamorphism. Accordingly these plutons emplaced at the Namurian-early Westphalian during the extensional phases related to the generalised gravitational collapse of the previously thickened Hercynian belt. The detachment of the subducted lithosphere (slab detachment) could be related to these phenomena and could explain the granitization of the south external area of the Hercynian belt as well as the migration of the magmatism towards the south of the belt.

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11

Dobereiner, Lorenz, Jean-Louis Durville, and Jacques Restitutito. "Weathering of the massiac gneiss (massif central, France)." Bulletin of the International Association of Engineering Geology 47, no. 1 (April 1993): 79–96. http://dx.doi.org/10.1007/bf02639596.

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12

Giusti, Christian. "Asymétrie topographique et morphogénétique dans le sud du Massif central (France) (Topographie and morphogenetic asymmetrv of the Southern Massif Central, France)." Bulletin de l'Association de géographes français 85, no. 2 (2008): 254–70. http://dx.doi.org/10.3406/bagf.2008.2620.

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13

Hugonnot, Vincent. "Bryophytes of the Peatlands of Aubrac (Massif Central - France)." Cryptogamie, Bryologie 32, no. 1 (January 2011): 43–63. http://dx.doi.org/10.7872/cryb.v32.iss1.2011.043.

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14

Zeyen, Hermann, Olaf Novak, Michael Landes, Claus Prodehl, Lynda Driad, and Alfred Hirn. "Refraction-seismic investigations of the northern Massif Central (France)." Tectonophysics 275, no. 1-3 (July 1997): 99–117. http://dx.doi.org/10.1016/s0040-1951(97)00017-6.

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15

Downes, Hilary. "Tertiary and Quaternary volcanism in the Massif Central, France." Geological Society, London, Special Publications 30, no. 1 (1987): 517–30. http://dx.doi.org/10.1144/gsl.sp.1987.030.01.25.

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16

Feijtel, T. C., A. G. Jongmans, N. Van Breemen, and R. Miedema. "Genesis of two Planosols in the Massif Central, France." Geoderma 43, no. 2-3 (December 1988): 249–69. http://dx.doi.org/10.1016/0016-7061(88)90046-8.

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17

Veldkamp, A., and A. G. Jongmans. "Trachytic pumice weathering, Massif Central, France: Geochemistry and micromorphology." Chemical Geology 84, no. 1-4 (July 1990): 145–47. http://dx.doi.org/10.1016/0009-2541(90)90192-a.

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18

Poschmann, Markus, Jason A. Dunlop, Olivier Béthoux, and Jean Galtier. "Carboniferous arachnids from the Graissessac Basin, Central Massif, France." Paläontologische Zeitschrift 90, no. 1 (March 2016): 33–48. http://dx.doi.org/10.1007/s12542-016-0295-7.

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19

Bogdanoff, Serge, Jean-Luc Cirodde, and Maurice Donnot. "The nappes of La Chataigneraie, southwest Massif Central, France." Tectonophysics 157, no. 1-3 (January 1989): 69–79. http://dx.doi.org/10.1016/0040-1951(89)90341-7.

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20

Martin, Philippe. "Approche fractale du karst des Grands Causses, Massif Central, France." Collection EDYTEM. Cahiers de géographie 7, no. 1 (2008): 63–78. http://dx.doi.org/10.3406/edyte.2008.1055.

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21

Lawalree, A. "Une nouvelle variete de Thesium (Santalaceae) du Massif Central (France)." Bulletin du Jardin botanique national de Belgique / Bulletin van de National Plantentuin van België 59, no. 3/4 (December 31, 1989): 467. http://dx.doi.org/10.2307/3668361.

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22

Martin, J.-M., M. Meybeck, V. N. Nijampurkar, and B. L. K. Somayajulu. "210Pb, 226Ra and 32Si in Pavin lake (Massif Central, France)." Chemical Geology 94, no. 3 (March 1992): 173–81. http://dx.doi.org/10.1016/s0009-2541(10)80002-6.

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23

Simon-Coinçon, Régine, Médard Thiry, and Florence Quesnel. "Paléopaysages et paléoenvironnements sidérolithiques du Nord du Massif central (France)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 330, no. 10 (May 2000): 693–700. http://dx.doi.org/10.1016/s1251-8050(00)00189-0.

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24

Vasari, Annicki, and Y. Vasari. "Relic occurence of Betula nana L. in Massif Central, France." Ecologia mediterranea 11, no. 1 (1985): 65–68. http://dx.doi.org/10.3406/ecmed.1985.1073.

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25

Juvigné, Etienne. "Deux retombées volcaniques tardiglaciaires dais le Cézallier (Massif Central, France)." Bulletin de l'Association française pour l'étude du quaternaire 24, no. 4 (1987): 241–49. http://dx.doi.org/10.3406/quate.1987.1853.

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26

Hutchison, R., C. T. Williams, P. Henderson, and S. J. B. Reed. "New varieties of mantle xenolith from the Massif Central, France." Mineralogical Magazine 50, no. 358 (December 1986): 559–65. http://dx.doi.org/10.1180/minmag.1986.050.358.02.

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AbstractSpinel lherzolite xenoliths from two localities in the Massif Central are undepleted in Al2O3, CaO, and Na2O. One suite from Tarreyres, is K2O depleted and amphibole-bearing whereas the other, from Monistrol d'Allier some 18 km away, is amphibole-free and has a higher mean K2O content of 0.035 wt.%. We present bulk major and minor element abundances in a harzburgite and a lherzolite from each locality and microprobe analyses of their constituent phases. Amphibole-bearing lherzolite and its pyroxenes are light-rare earth element (LREE) depleted, whereas amphibole-free lherzolite and its pyroxenes are LREE enriched. Both harzburgites and their pyroxenes are LREE enriched and one rock contains LREE enriched glass. The harzburgites are like harzburgite xenoliths from elsewhere but each lherzolite represents a previously unrecognized type of mantle in terms of the mineralogy and REE content. The implication for basalt genesis are briefly discussed.

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27

Downes, H. "Magma mixing in undersaturated alkaline volcanics, Cantal, Massif Central, France." Mineralogical Magazine 53, no. 369 (March 1989): 43–53. http://dx.doi.org/10.1180/minmag.1989.053.369.04.

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AbstractSeveral examples of magma mixing exist within the undersaturated alkaline magma series of the Tertiary/Quaternary volcanics in the French Massif Central. This study describes magma mixing in the Puy Griou/Griounot area of the Cantal volcano (10-3 Ma). Petrographic evidence for injection of blebs of basic magma into phonolitic host magmas is abundant (cauliform inclusions, liquid-liquid contacts, vesiculation and chilling). Compositions of the inclusions are basic tephrite, whereas the hosts are miaskitic phonolites. Petrographic examination reveals the presence of disequilibrium mineralogical features (e.g. Mg-rich olivine in phonolites) and strong zoning in many clinopyroxenes. Transfer of phenocrysts between basic inclusions and phonolite hosts was common, and can be seen clearly in the wide range of compositions of clinopyroxene. Hornblende, magnetite and olivine were also transferred from inclusions to host.Sr and Nd isotope data indicate that, unlike most other fractionated magmas of the region, phonolites which show evidence for magma mixing are uncontaminated by the continental crust and have isotopic ratios similar to local primitive basic magmas. This leads to the suggestion that the magma mixing event took place at great depth, rather than being a high-level phenomenon. The phonolites were thus generated by high-pressure fractional crystallisation of an earlier basanitic or tephritic parent, perhaps at upper-mantle depths. This conclusion may explain why some phonolites elsewhere in the world have entrained spinel Iherzolite mantle xenoliths.

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28

Merceron, T. "Lithium-Bearing Donbassite and Tosudite from Echassières, Massif Central, France." Clays and Clay Minerals 36, no. 1 (1988): 39–46. http://dx.doi.org/10.1346/ccmn.1988.0360106.

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29

Thébaud, Gilles, Pierre Goubet, Renée Skrzypczak, and Éric Sourp. "Communautés végétales des tourbières ombrotrophes du Massif central oriental (France)." Acta Botanica Gallica 156, no. 3 (January 2009): 341–77. http://dx.doi.org/10.1080/12538078.2009.10516164.

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30

Edel, J. B. "Paleomagnetic evolution of the Central Massif (France) during the Carboniferous." Earth and Planetary Science Letters 82, no. 1-2 (March 1987): 180–92. http://dx.doi.org/10.1016/0012-821x(87)90118-x.

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31

Martins, J.-M., M. Meybecks, V. N. Nijampurkar, and B. L. K. Somayajulu. "210Pb, 226Ra and 32Si in Pavin lake (Massif Central, France)." Chemical Geology: Isotope Geoscience section 94, no. 3 (March 1992): 173–81. http://dx.doi.org/10.1016/0168-9622(92)90010-8.

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32

Chen, Yan, Michel Faure, and Jean Pascal Cogné. "Late Permian palaeomagnetic results from the Brive basin (Massif Central, France)." Tectonophysics 281, no. 3-4 (November 1997): 209–20. http://dx.doi.org/10.1016/s0040-1951(97)00043-7.

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33

Elmi, Serge, and Louis Rulleau. "Le Jurassique du Beaujolais méridional, bordure orientale du Massif Central, France." Geobios 26 (January 1993): 139–55. http://dx.doi.org/10.1016/s0016-6995(06)80368-2.

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34

Uenver-Thiele, Laura, Alan B. Woodland, Hilary Downes, and Rainer Altherr. "Oxidation State of the Lithospheric Mantle below the Massif Central, France." Journal of Petrology 55, no. 12 (December 2014): 2457–80. http://dx.doi.org/10.1093/petrology/egu063.

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35

Francez, André-Jean, and Jean Dévaux. "Répartition des rotifères dans deux lacs-tourbières du Massif Central (France)." Hydrobiologia 128, no. 3 (September 1985): 265–76. http://dx.doi.org/10.1007/bf00006823.

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36

Pastre, Jean François, and Jean Marie Cantagrel. "Téphrostratigraphie du Mont Dore / The Mont Dore tephrostratigraphy (Massif Central, France)." Quaternaire 12, no. 4 (2001): 249–67. http://dx.doi.org/10.3406/quate.2001.1697.

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37

Merceron, Thierry, Philippe Vieillard, Anne-Marie Fouillac, and Alain Meunier. "Hydrothermal alterations in the Echassi�res granitic cupola (Massif central, france)." Contributions to Mineralogy and Petrology 112, no. 2-3 (November 1992): 279–92. http://dx.doi.org/10.1007/bf00310461.

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38

Matthews, A., C. Fouillac, R. Hill, R. K. O'Nions, and E. R. Oxburgh. "Mantle-derived volatiles in continental crust: the Massif Central of France." Earth and Planetary Science Letters 85, no. 1-3 (September 1987): 117–28. http://dx.doi.org/10.1016/0012-821x(87)90026-4.

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39

de Beaulieu, J. L., and M. Reille. "Long Pleistocene pollen sequences from the Velay Plateau (Massif Central, France)." Vegetation History and Archaeobotany 1, no. 4 (December 1992): 233–42. http://dx.doi.org/10.1007/bf00189500.

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40

Freytet, Pierre, Marie-Luce Lebreton, and Yves Paquette. "The carbonates of the Permian Lakes of North Massif central, France." Carbonates and Evaporites 7, no. 2 (September 1992): 122–31. http://dx.doi.org/10.1007/bf03175626.

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41

Ramananantoandro, R. "Seismic evidence for mantle flow beneath the Massif Central rift zone (France)." Canadian Journal of Earth Sciences 25, no. 12 (December 1, 1988): 2139–42. http://dx.doi.org/10.1139/e88-197.

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Abstract:

The elastic-wave velocities in three spinel lherzolite xenoliths from the Massif Central rift zone (France) indicate that the high field seismic velocity (8.4 km/s) found parallel to the rift, at a depth of 40 km in the upper mantle beneath the Massif Central, can only be explained by a preferred orientation of the olivine a axis parallel to the rift. This is not predicted by two-dimensional models of mantle flow beneath a rift. Horizontal asthenospheric flow in lithospheric fractures associated with rifting would explain the olivine orientation and the high upper mantle velocity parallel to the rift axis.

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42

Larue, Jean-Pierre. "Tectonical and morphodynamical evolution of the southern Massif Central border, between the Cesse and Hérault rivers (France)." Bulletin de la Société Géologique de France 175, no. 6 (November 1, 2004): 547–60. http://dx.doi.org/10.2113/175.6.547.

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Abstract Despite numerous researches concerning the Massif Central southern border, there are no certainties about the number and the chronology of the erosion surfaces, the uplift stages of the Massif Central and the incision stages of the rivers. Located on the Massif Central basement and on the Languedocian piedmont, the Orb, Libron and Hérault tributaries basins show a good pattern of shapes and formations, from the Caroux to the littoral plain. Geomorphological and sedimentological study brings some new insights to these questions. Heavy minerals analysis allows us to separate different formations among the deposits located on the erosion surfaces and in the valleys. It is used to reconstruct the main sedimentary pathways. North-south fluxes crossed the Avant-Monts up to the Upper Pliocene, despite of the Miocene uplift. Upper Pliocene uplift of the Avant-Monts caused the bifurcation of the Orb towards the west, the antecedent incision between the Jaur confluence and Cessenon and the stepped pediments and glacis on the Avant-Monts southern border. The longitudinal paleoprofiles argue for a progressive uplift of the Massif Central since the Messinian unconformity. Incision of the valleys began before the Messinian in the Massif Central, but only during the Lower Pleistocene in the Languedocian piedmont.

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Hugonnot, Vincent, Jaoua Celle, and Thierry Vergne. "Bryophytes Hyperocéaniques dans les Vallons du Sud-Ouest du Massif Central (France)." Cryptogamie, Bryologie 34, no. 3 (July 2013): 325–39. http://dx.doi.org/10.7872/cryb.v34.iss3.2013.325.

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Delaunay, Lionel. "Meira mellei n. sp. du mont Tanargue, Massif central, France (Coleoptera Curculionidae)." Bulletin mensuel de la Société linnéenne de Lyon 80, no. 5 (2011): 113–18. http://dx.doi.org/10.3406/linly.2011.12683.

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45

Bruce, S. "The Genesis of Mineralising Brines in the South West Massif Central, France." Mineralogical Magazine 62A, no. 1 (1998): 238–39. http://dx.doi.org/10.1180/minmag.1998.62a.1.126.

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46

Monnier, Loïs, Stefano Salvi, Jérémie Melleton, Laurent Bailly, Didier Béziat, Philippe de Parseval, Sophie Gouy, and Philippe Lach. "Multiple Generations of Wolframite Mineralization in the Echassieres District (Massif Central, France)." Minerals 9, no. 10 (October 17, 2019): 637. http://dx.doi.org/10.3390/min9100637.

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The Echassières district in central France contains complex rare-element ore deposits, whose formation is related to exotic igneous events and several hydrothermal episodes that are not entirely understood to date. Tungsten mineralization consists of three generations of wolframite, characterized by distinct Fe/Mn ratios (8.4; 3.5 and 0.3, for wolframite a, b and c, respectively), formed during three separate hydrothermal episodes related to the Variscan orogeny. Wolframite a occurs in quartz veins of the La Bosse stockwork where it crystallized before the Barrovian metamorphism that affected these veins and the host rock. After metamorphism, before intrusion of the Beauvoir and Colettes granites, wolframite b crystallized in the stockwork during massive topazification. High concentrations of wolframite c occur in the proximal quartz veins in the Mazet area, while only scant amounts are found in the La Bosse stockwork. In both settings, wolframite c precipitated from the fluid responsible for greisen alteration that massively affected the Beauvoir granite. In the La Bosse stockwork, greisen alteration is characterized by hydrothermal topaz that is texturally and chemically distinct from that precipitated during topazification. Supergene alteration responsible for kaolinization of Beauvoir and Colettes granites caused remobilization of a non-negligible amount of tungsten (W) during replacement of wolframite by W-rich goethite in all units of the Echassières district. This model for multiple W mineralizing events is novel and can prove essential in distinguishing potential economic deposits worldwide.

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Schaminée, Joop H. J., Caroline Coolen, and Marian B. Siebum. "The vegetation of 'snowbeds' in the Monts du Forez (Massif Central, France)." Phytocoenologia 21, no. 1-2 (October 27, 1992): 175–206. http://dx.doi.org/10.1127/phyto/21/1992/175.

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Granet, M., G. Stoll, J. Dorel, U. Achauer, G. Poupinet, and K. Fuchs. "Massif Central (France): new constraints on the geodynamical evolution from teleseismic tomography." Geophysical Journal International 121, no. 1 (April 1995): 33–48. http://dx.doi.org/10.1111/j.1365-246x.1995.tb03509.x.

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Mies, Bruno A. "New or Interesting Lichens from the Limousin Region (Western Massif Central, France)." Herzogia 28, no. 2 (November 2015): 473–783. http://dx.doi.org/10.13158/heia.28.2.2015.473.

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Downes, Hilary, and Claude Dupuy. "Textural, isotopic and REE variations in spinel peridotite xenoliths, Massif Central, France." Earth and Planetary Science Letters 82, no. 1-2 (March 1987): 121–35. http://dx.doi.org/10.1016/0012-821x(87)90112-9.

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