Results 1 to 10 of about 4,105 (193)

Kinematics, deformation partitioning and late Variscan magmatism in the Agly massif, Eastern Pyrenees, France [PDF]

BSGF - Earth Sciences Bulletin, 2020
In order to constrain the finite deformation pattern of the Variscan basement of the Agly massif, a detailed structural analysis over the whole Agly massif was performed.
Vanardois Jonas, Trap Pierre, Goncalves Philippe, Marquer Didier, Gremmel Josselin, Siron Guillaume, Baudin Thierry   +6 more
doaj   +3 more sources

A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres [PDF]

Geologica Acta, 2006
The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cut by small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes was undertaken to constrain the Late Variscan
J.H. SCARROW, F. BEA, P. GONZÁLEZ MONTERO, J. F. MOLINA PALMA, ALAN VAUGHAN   +4 more
doaj   +6 more sources

Geology of late-Variscan Sàrrabus pluton (south-eastern Sardinia, Italy)

Journal of Maps, 2021
This paper deals with the geological mapping of the late-Variscan Sàrrabus pluton, (south-eastern Sardinia), a shallow multiple and composite igneous complex dominated by several generations of granodiorites, metaluminous and peraluminous granites and ...
F. Secchi, S. Naitza, G. Oggiano, S. Cuccuru, A. Puccini, A. M. Conte, T. Giovanardi, M. Mazzucchelli   +7 more
doaj   +2 more sources

Polyphased rare-element magmatism during late orogenic evolution: geochronological constraints from NW Variscan Iberia

BSGF - Earth Sciences Bulletin, 2022
Rare-element granites and pegmatites represent important sources of raw materials for “clean, green and high technologies”, such as lithium and tantalum, for example.
Melleton Jérémie, Gloaguen Eric, Frei Dirk, Lima Alexandre, Vieira Romeu, Martins Tania   +5 more
doaj   +1 more source

The enriched Variscan lithosphere of NE Iberia: data from postcollisional Permian calc-alkaline lamprophyre dykes of Les Guilleries

Geologica Acta, 2021
Post-collisional mafic dykes crosscut the Paleozoic metamorphic basement and late-Variscan plutons in Les Guilleries massif (Catalan Coastal Ranges, NE Iberia).
Esteban Mellado, Mercè Corbella, Didac Navarro-Ciurana, Andrew Kylander-Clark   +3 more
doaj   +1 more source

Age of the basement beneath the Mesozoic Lusitanian Basin revealed by granitic xenoliths from the Papôa volcanic breccia (West Iberia)

Geologica Acta, 2020
The dyke of the Papôa volcanic breccia cross-cutting the Lower Jurassic sequence of the Lusitanian Basin (West Iberia) contains granitic xenoliths. In this study, for the first time, U-Th-Pb zircon analysis of two xenoliths yielded 298±4Ma for biotite ...
M.F. Pereira, C. Gama, J.B. Silva, Í. Dias da Silva   +3 more
doaj   +3 more sources

Syntectonic magmatism and reactivation of collisional structures during late-Variscan shearing (SW Sardinia, Italy)

International Journal of Earth Sciences, 2022
AbstractThe Arbus igneous complex (SW Sardinia, Italy) represents a good example of a short time lived post-collisional composite pluton emplaced at shallow crustal level in the external zone of the Variscan chain. The pluton almost consists of granodiorite and leucogranite rock-suites emplaced at 304 ± 1 Ma within a main NW trending thrust separating ...
F. Secchi, L. Casini, F. Cifelli, S. Naitza, E. Carta, G. Oggiano   +5 more
openaire   +3 more sources

Late Variscan metamorphic and magmatic evolution in the eastern Pyrenees revealed by U–Pb age zircon dating [PDF]

Journal of the Geological Society, 2013
Variscan migmatites cropping out in the eastern Pyrenees were dated together with Late Variscan plutonic rocks. Upper Proterozoic–Lower Cambrian series were migmatized during a thermal episode that occurred in the interval 320–315 Ma coeval with the main Variscan deformation event (D 1 ).
Aguilar Gil, Carmen María, Liesa Torre-Marín, Montserrat, Castiñeiras García, Pedro, Fernández de la Cruz, Marina Navidad   +3 more
openaire   +6 more sources

Flow of partially molten crust controlling construction, growth and collapse of the Variscan orogenic belt: the geologic record of the French Massif Central

BSGF - Earth Sciences Bulletin, 2020
We present here a tectonic-geodynamic model for the generation and flow of partially molten rocks and for magmatism during the Variscan orogenic evolution from the Silurian to the late Carboniferous based on a synthesis of geological data from the French
Vanderhaeghe Olivier, Laurent Oscar, Gardien Véronique, Moyen Jean-François, Gébelin Aude, Chelle-Michou Cyril, Couzinié Simon, Villaros Arnaud, Bellanger Mathieu   +8 more
doaj   +1 more source

Geochemistry and paleogeographic implications of Permo-Triassic metasedimentary cover from the Tauern Window (Eastern Alps) [PDF]

European Journal of Mineralogy, 2021
The chemical composition of metasediments is a valuable source of paleogeographic information about the protolith's sedimentary environment. Here, we compile major- and trace-element whole-rock data, including B contents, and 10/11B-isotope ratios from ...
G. Franz, M. Kutzschbach, E. J. Berryman, A. Meixner, A. Loges, A. Loges, D. Schultze, D. Schultze   +7 more
doaj   +1 more source