|
Regular Article |
1 Department of Earth Sciences, Memorial University of Newfoundland, St John’s, NF, Canada A1B 3X5
2 Departamento de Geología, Facultad de Ciencias, Universidad de Salamanca, 37008 Salamanca, Spain (e-mail: gabi{at}usal.es)
Present address: Departamento de Petrología y Geoquímica, Facultad de Geología, Universidad Complutense, 28040 Madrid, Spain (e-mail: jfsuarez@eucmos.sim.ucm.es)
Scientific editing by Randall Parish.
U–Pb geochronology of Variscan granitoid rocks from the West Asturian Leonese Zone of the NW Iberian belt documents the episodic nature of magmatism in this section of the western European Variscides. Each magmatic episode is characterized by granitoids with distinct features and has a duration on the scale of several millions of years. The ages of these granitoids place new constraints on the age and duration of magmatic and tectonic events, that are consistent with previous structural studies and proposed models for the tectonic evolution and migration of deformation in the NW Iberian Variscan belt.
Granitoid rocks in this zone belong to two main magmatic episodes (syn- and post-tectonic relative to the Variscan Orogeny) and are broadly representative of the granitoid types found in the NW Iberian Variscan belt. The syntectonic association is formed by: (i) tonalite–granodiorite–monzogranite intrusions emplaced synchronously with the main phase of crustal deformation (D2) at c. 325 Ma and (ii) younger leucogranite intrusions emplaced synchronously with syn-convergence extensional structures at c. 320–310 Ma. The post-tectonic association is composed of: (i) volumetrically dominant tonalite–granodiorite–monzogranite intrusions (and associated minor mafic-intermediate rocks) emplaced at c. 295–290 Ma; and (ii) scarce leucogranite intrusions emplaced at c. 290–285 Ma.
Keywords: Iberia, Variscides, granitoids, U/Pb, deformation.
This article has been cited by other articles:
 |
|
 |
|
  A. Weil, G. Gutierrez-alonso, and J. Conan New time constraints on lithospheric-scale oroclinal bending of the Ibero-Armorican Arc: a palaeomagnetic study of earliest Permian rocks from Iberia Journal of the Geological Society, 2010; 167: 127 - 143. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. E. Alcock, J. R. Martinez Catalan, R. Arenas, and A. Diez Montes Use of thermal modeling to assess the tectono-metamorphic history of the Lugo and Sanabria gneiss domes, Northwest Iberia Bulletin de la Societe Geologique de France, 2009; 180: 179 - 197. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. R. MARTiNEZ CATALaN, J. FERNaNDEZ-SUaREZ, C. MEIRELES, E. GONZaLEZ CLAVIJO, E. BELOUSOVA, and A. SAEED U-Pb detrital zircon ages in synorogenic deposits of the NW Iberian Massif (Variscan belt): interplay of Devonian-Carboniferous sedimentation and thrust tectonics Journal of the Geological Society, 2008; 165: 687 - 698. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. GALAN, J. C. FERNANDEZ-CALIANI, A. MIRAS, P. APARICIO, and M. G. MARQUEZ Residence and fractionation of rare earth elements during kaolinization of alkaline peraluminous granites in NW Spain Clay Minerals, 2007; 42: 341 - 352. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. R. M. Catalan, R. Arenas, F. D. Garcia, P. G. Cuadra, J. Gomez-Barreiro, J. Abati, P. Castineiras, J. Fernandez-Suarez, S. S. Martinez, P. Andonaegui, et al. Space and time in the tectonic evolution of the northwestern Iberian Massif: Implications for the Variscan belt Geological Society of America Memoirs, 2007; 200: 403 - 423. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Keller, H. Bahlburg, C.D. Reuther, and A. Weh Flexural to broken foreland basin evolution as a result of Variscan collisional events in northwestern Spain Geological Society of America Memoirs, 2007; 200: 489 - 510. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Gasparrini, R. J. Bakker, and T. Bechstadt Characterization of Dolomitizing Fluids in the Carboniferous of the Cantabrian Zone (NW Spain): A Fluid-Inclusion Study with Cryo-Raman Spectroscopy Journal of Sedimentary Research, 2006; 76: 1304 - 1322. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. R. Martinez Catalan, J. R.M. Catalan, J. FernAndez-SuArez, G. A. Jenner, E. Belousova, and A. Montes Provenance constraints from detrital zircon U-Pb ages in the NW Iberian Massif: implications for Palaeozoic plate configuration and Variscan evolution Journal of the Geological Society, 2004; 161: 463 - 476. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Aranguren, A. Aranguren, J. Cuevas, J.M. TubIa, T. RomAn-Berdiel, A. Casas-Sainz, and A. Casas-Ponsati Granite laccolith emplacement in the Iberian arc: AMS and gravity study of the La Tojiza pluton (NW Spain) Journal of the Geological Society, 2003; 160: 435 - 445. [Abstract] [Full Text] [PDF]
|
|
