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Variscan metamorphism in the eastern Pyrenees and its relation to Late-Variscan magmatism revealed by U-Pb zircon dating: implications for the configuration of the Variscan Belt in the NE Iberian Peninsula

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Aguilar, Carmen y Liesa Torre Marín, Montserrat y Castiñeiras García, Pedro y Navidad Fernández de la Cruz, Marina (2014) Variscan metamorphism in the eastern Pyrenees and its relation to Late-Variscan magmatism revealed by U-Pb zircon dating: implications for the configuration of the Variscan Belt in the NE Iberian Peninsula. Journal of the Geological Society, 171 (2). pp. 181-192. ISSN 0016-7649

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URL Oficial: http://www.geolsoc.org.uk/jgs



Resumen

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 (D1). The calc-alkaline Sant Llorenç–La Jonquera pluton and the gabbro–diorite Ceret stock were emplaced during a later thermal episode synchronous with the D2 deformation event. A tonalite located at the base of La Jonquera suite intruded into the upper crustal levels between 314 and 311 Ma. The gabbro–diorite stock was emplaced in the middle levels of the series in two magmatic pulses at 312 and 307 Ma. The thermal evolution recorded in the eastern Pyrenees can be correlated with that of neighbouring areas of NE Iberia (Pyrenees–Catalan Coastal Ranges) and SE France (Montagne Noire). The correlation suggests a NW–SE-trending zonation where the northeasternmost areas (Montagne Noire and eastern Pyrenees) would occupy relatively more internal zones of the orogen than the southwesternmost ones.


Tipo de documento:Artículo
Palabras clave:Methamorphism, Magmatic evolution, Pyrenees
Materias:Ciencias > Geología
Ciencias > Geología > Geoquímica
Ciencias > Geología > Petrología
Código ID:26651
Depositado:10 Sep 2014 11:28
Última Modificación:01 Ene 2015 00:01

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