Results 101 to 110 of about 8,012 (220)

Bimodal magmatism as a consequence of the post-collisional readjustment of the thickened Variscan continental lithosphere (Aiguilles Rouges-Mont Blanc Massifs, Western Alps) [PDF]

, 2017
: High Precision U-Pb zircon and monazite dating in the Aiguilles Rouges-Mont Blanc area allowed discrimination of three short-lived bimodal magmatic pulses: the early 332 Ma Mg-K Pormenaz monzonite and associated 331 Ma peraluminous Montées Pélissier ...
Bussy, François, Hernandez, Jean, Von Raumer, Jürgen   +2 more
core  

40Ar/39Ar laserprobe dating of mylonitic fabrics in a polyorogenic terrane of NW Iberia [PDF]

, 2006
The tectonothermal evolution of a polyorogenic terrane in the Variscan belt of NW Spain has been constrained by 40Ar/39Ar laserprobe incremental heating experiments on mylonitic fabrics developed in major structures.
Abati Gómez, Jacobo, Arenas Martín, Ricardo, Castiñeiras García, Pedro, Díaz García, Florentino, Gómez Barreiro, Juan, Martínez Catalán, José R., Wijbrans, Jan R.   +6 more
core  

Seismic anisotropy beneath southern Iberia from SKS splitting [PDF]

, 2008
International audienceSeismic anisotropy of the south Iberian upper mantle is investigated using shear-wave splitting of SKS phases. We analyzed teleseismic events recorded by sixteen permanent broadband stations installed on the southern Iberian ...
Barruol, Guilhem, Bokelmann, Goetz, Buontempo, L., Morales, J.   +3 more
core   +2 more sources

The Long-Lasting Exhumation History of the Ötztal-Stubai Complex (Eastern European Alps): New Constraints from Zircon (U–Th)/He Age-Elevation Profiles and Thermokinematic Modeling [PDF]

Lithosphere
The Eastern European Alps formed during two orogenic cycles, which took place in the Cretaceous and Cenozoic, respectively. In the Ötztal-Stubai Complex—a thrust sheet of Variscan basement and Permo-Mesozoic cover rocks—the record of the first (Eoalpine)
Kyra Hölzer, Reinhard Wolff, Ralf Hetzel, István Dunkl   +3 more
doaj   +1 more source

Late Variscan, Permo-Carboniferous, Al-K plutonism in the South Portuguese Zone: El Crispinejo cordierite-bearing granite.

Geologica Acta, 2017
The El Crispinejo granite forms part of a small, but distinctive late intrusive suite of cordierite-bearing peraluminous granites in the South Portuguese Zone (SPZ). This granite has the best outcrop relationships of the suite.
A. DÍEZ MONTES, PABLO VALVERDE-VAQUERO, C. REY-MORAL, T. SÁNCHEZ-GARCÍA   +3 more
doaj  

Chemical and mineralogical data of the metalliferous mineralization from S. Carlo mine (Peloritani mts, Ne Sicily, Italy)

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2006
The mineralization processes in the Peloritani Belt (Southern Sector of the Calabria- Peloritani Arc) prevalently developed during the Variscan orogenesis producing Pb, Zn, Fe, As, Sb, Cu, Ag, W, etc. polymetalliferous ore-bearing horizons.
Pisacane, G, de Fazio, A, Nucera, P, Sacca', D, Sacca', C   +4 more
doaj   +1 more source

Deciphering orogeny: a metamorphic perspective. Examples from European Alpine and Variscan belts

Bulletin de la Société Géologique de France, 2014
AbstractIn this paper we review and discuss, in a synthetic historical way, the main results obtained on Alpine metamorphism in the western Alps. First, we describe the finite metamorphic architecture of the western Alps and discuss its relationships with subduction and collision processes.
openaire   +1 more source

Petrogenetic link between metasedimentary rocks, migmatites and granitoids in the Variscan basement of the Pontgibaud area, French Massif Central – implications for the crustal structure

BSGF - Earth Sciences Bulletin
The architecture of the crust in the French Massif Central (FMC) is described as a nappe stack composed, from top to bottom, of the Upper Gneiss Unit (UGU), the Lower Gneiss Unit (LGU), and the Para-Autochthonous Unit (PAU), which are intruded by ...
Passos do Carmo Caliméria, Vanderhaeghe Olivier, Laurent Oscar, Berger Julien, Bellanger Mathieu, Leisen Mathieu, Chmeleff Jérôme   +6 more
doaj   +1 more source

Lithospheric structure and tectonic memory of the European Variscan belt

Geological Society, London, Special Publications
The Variscan belt of Europe formed during the late Paleozoic through the convergence of Laurussia and Gondwana, subduction of intervening oceans, and the accretion of peri-Gondwanan terranes during Pangaea assembly. This study integrates geological, geophysical and crust–mantle structural data to investigate the orogen's construction, destruction and ...
Stanislaw Mazur, Imma Palomeras, Christian Schiffer, Olivier Vanderhaeghe, Jacek Puziewicz   +4 more
openaire   +1 more source

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