Results 101 to 110 of about 1,858 (217)

Short-lived active margin magmatism preceding Variscan collision in the Western French Massif Central

BSGF - Earth Sciences Bulletin
This paper presents and discusses new geochronological and petrological data on a suite of calc-alkaline plutons composed predominantly of diorites and tonalites from the West Massif Central.
Berger Julien, Beau-Hurdebourcq Léa, Serrano Julien, Benoit Mathieu, Grégoire Michel, Benmammar Anissa, Duchene Stéphanie, Bruguier Olivier, Baele Jean-Marc   +8 more
doaj   +1 more source

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas

, 2015
[EN] Major and trace element chemistry has been determined in the main minerals (olivine, orthopyroxene, clinopyroxene, plagioclase, amphibole, phlogopite) from the Talavera and La Solanilla gabbroic intrusions (Spanish Central System). The results show
Jeffries, T. E., Losantos, E., Jeffries, T, Villaseca González, Carlos, Orejana, D., Villaseca, Carlos, Orejana García, David, Jeffries, T.E., Orejana, D, Losantos, E, Villaseca, C, Losantos, Emma   +11 more
core   +1 more source

Quantitative P–T–t–D Paths: A Key to decipher orogenic dynamics in the Variscan Aiguilles Rouges Massif (External Crystalline Massifs, Western Alps)

BSGF - Earth Sciences Bulletin
This study investigates the P–T–t–D evolution of two metapelitic samples from the middle crust exposed in the Aiguilles Rouges Massif. Garnet compositional mapping, phase equilibrium modelling, zirconium-in-rutile thermometry, trace element geochemistry ...
Vanardois Jonas, Trap Pierre, Goncalves Philippe, Roger Françoise, Lanari Pierre, Piccoli Francesca, Marquer Didier, Paquette Jean-Louis, Melleton Jérémie   +8 more
doaj   +1 more source

Rare-metal mineralization and crust-derived magmatism in a collisional orogen: the Variscan metallogenic odyssey of the Sioule region (French Massif Central)

BSGF - Earth Sciences Bulletin
The Sioule region in the northern part of the French Massif Central of the Variscan belt hosts the Echassières complex, where a large W(-Sn) quartz vein system was intruded by the Beauvoir rare-metal granite (RMG) hosting disseminated Sn, Nb-Ta and Li ...
Ballouard Christophe, Carr Patrick A., Monnier Loïs, Fidalgo Jean-Charles, Rocher Océane, Esteves Nicolas, Laurent Oscar, Daoulas-Gérardin Marie, Peiffert Chantal, Declercq Lou, Mercadier Julien, Plunder Alexis, Melleton Jérémie   +12 more
doaj   +1 more source

Deep seismic reflection profiles in SE Poland reveal a Variscan thin-skinned fold-and-thrust belt encroaching the East European Craton [PDF]

, 2018
20th EGU General Assembly, EGU2018, Proceedings from the conference held 4-13 April, 2018 in Vienna, AustriaRecent years have brought a significant progress in understanding of the external Variscides in Poland.
Kufrasa, Mateusz, Żaba, Jerzy, Mazur, Stanisław, Gągała, Łukasz, Krzywiec, Piotr, Gaidzik, Krzysztof   +5 more
core  

Rare-elements (Li-Be-Ta-Sn-Nb) magmatism in the European Variscan belt, a review

, 2015
International audienceThe European Variscan belt, which is characterized by a huge amount of granitic intrusions, displays several significant rare-elements pegmatites and/or granites fields which could represent an important source of raw materials.
Gloaguen, Eric, Melleton, Jérémie
core   +1 more source

cGPS Record of Active Extension in Moroccan Meseta and Shortening in Atlasic Chains under the Eurasia-Nubia Convergence. [PDF]

Sensors (Basel), 2023
Chalouan A, Gil AJ, Chabli A, Bargach K, Liemlahi H, El Kadiri K, Tendero-Salmerón V, Galindo-Zaldívar J.   +7 more
europepmc   +1 more source

Imprint of the Reguibat Promontory (West Africa) on the Appalachian, Mauritanide and Souttoufide Belts During the Assembly of Pangaea

Geosciences
During the course of the Carboniferous to Permian, large parts of eastern Laurentia and northern Gondwana were affected by the Variscan Orogeny accompanying the assembly of Pangea. Here, we concentrate on the Appalachian belt of eastern Laurentia and the
Michel Villeneuve, Omar Guillou, Andreas Gärtner, Abdelkrim El Archi, Abdelmohsine Aghzer, Hervé Bellon, Paul A. Mueller, Papa Moussa Ndiaye, Nasrrddine Youbi, Ulf Linnemann, Michel Corsini   +10 more
doaj   +1 more source

Topographic reconstructions of the Variscan Belt of Western Europe through the study of fossil hydrothermal systems

, 2019
This thesis presents the first stable isotope quantification of paleoaltimetry for the Variscan Belt of Western Europe that integrates late-Carboniferous hydrogen isotope ratios of meteoric water in the internal zones in the Armorican Massif (AM) and the
Dusséaux, Camille
core  

Synorogenic sedimentation in the Variscan Belt of Europe

Bulletin de la Société Géologique de France, 1986
Wolfgang Engel, Wolfgang Franke
openaire   +1 more source