U–Pb Zircon geochronology of the Cambro-Ordovician metagranites and metavolcanic rocks of central and NW Iberia
dc.contributor.author | Talavera, Cristina | |
dc.contributor.author | Montero, P. | |
dc.contributor.author | Bea, F. | |
dc.contributor.author | Gonzalez Lodeiro, F. | |
dc.contributor.author | Whitehouse, M | |
dc.date.accessioned | 2017-01-30T13:53:48Z | |
dc.date.available | 2017-01-30T13:53:48Z | |
dc.date.created | 2014-03-19T20:00:43Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Talavera, C. and Montero, P. and Bea, F. and Gonzalez Lodeiro, F. and Whitehouse, M. 2013. U–Pb Zircon geochronology of the Cambro-Ordovician metagranites and metavolcanic rocks of central and NW Iberia. International Journal of Earth Sciences. 102: pp. 1-23. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/36128 | |
dc.identifier.doi | 10.1007/s00531-012-0788-x | |
dc.description.abstract |
New U–Pb zircon data from metagranites and metavolcanic rocks of the Schist-Graywacke Complex Domain and the Schistose Domain of Galicia Tras-os-Montes Zone from central and NW Iberia contribute to constrain the timing of the Cambro-Ordovician magmatism from Central Iberian and Galicia Tras-os-Montes Zones which occurred between 498 and 462 Ma. The crystallization ages of the metagranites and metavolcanic rocks from the northern Schist-Graywacke Complex Domain are as follows: (a) in west Salamanca, 489 ± 5 Ma for Vitigudino, 486 ± 6 Ma for Fermoselle and 471 ± 7 Ma for Ledesma; (b) in northern Gredos, 498 ± 4 Ma for Castellanos, 492 ± 4 Ma for San Pelayo and 488 ± 3 Ma for Bercimuelle; (c) in Guadarrama, 490 ± 5 Ma for La Estacion I, 489 ± 9 Ma for La Canada, 484 ± 6 Ma for Vegas de Matute (leucocratic), 483 ± 6 Ma for El Cardoso, 482 ± 8 Ma for La Morcuera, 481 ± 9 Ma for Buitrago de Lozoya, 478 ± 7 Ma for La Hoya, 476 ± 5 Ma for Vegas de Matute (melanocratic), 475 ± 5 Ma for Riaza, 473 ± 8 Ma for La Estacion II and 462 ± 11 Ma for La Berzosa; and (d) in Toledo, 489 ± 7 Ma for Mohares and 480 ± 8 Ma for Polan. The crystallization ages of the metagranites from the Schistose Domain of Galicia Tras-os-Montes Zone are 497 ± 6 Ma for Laxe, 486 ± 8 Ma for San Mamede, 482 ± 7 Ma for Bangueses, 481 ± 5 Ma for Noia, 480 ± 10 for Rial de Sabucedo, 476 ± 9 Ma for Vilanova, 475 ± 6 Ma for Pontevedra, 470 ± 6 Ma for Cherpa and 462 ± 8 Ma for Bande.This magmatism is characterized by an average isotopic composition of (87Sr/86Sr)485Ma ≈ 0.712, (eNd)485Ma ≈ -4.1 and (TDM) ≈ 1.62 Ga, and a high zircon inheritance, composed of Ediacaran–Early Cambrian (65 %) and, to a lesser extent, Cryogenian, Tonian, Mesoproterozoic, Orosirian and Archean pre-magmatic cores. Combining our geochronological and isotopic data with others of similar rocks from the European Variscan Belt, it may be deduced that Cambro-Ordovician magmas from this belt were mainly generated by partial melting of Ediacaran–Early Cambrian igneous rocks. | |
dc.publisher | Springer | |
dc.subject | Cambro-Ordovician | |
dc.subject | U–Pb dating | |
dc.subject | Zircon | |
dc.subject | Magmatism | |
dc.title | U–Pb Zircon geochronology of the Cambro-Ordovician metagranites and metavolcanic rocks of central and NW Iberia | |
dc.type | Journal Article | |
dcterms.source.volume | 102 | |
dcterms.source.startPage | 1 | |
dcterms.source.endPage | 23 | |
dcterms.source.issn | 1437-3254 | |
dcterms.source.title | International Journal of Earth Sciences | |
curtin.note |
The final publication is available at SpringerLink. | |
curtin.department | ||
curtin.accessStatus | Open access |