Magmatic evolution in the N‑Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia‑Trás‑os‑Montes Zone and from the Central Iberian Zone (NW Iberian Massif)

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dc.contributor.author Silva, Ícaro Fróis Dias da
dc.contributor.author Díez Fernández, Rubén
dc.contributor.author Díez Montes, Alejandro
dc.contributor.author González Clavijo, Emilio José
dc.contributor.author Foster, David A,
dc.date.accessioned 2020-12-17T05:49:26Z
dc.date.available 2020-12-17T05:49:26Z
dc.date.issued 2016
dc.identifier.citation International Journal of Earth Sciences, 2016, v. 105, 1127-1151 es_ES
dc.identifier.issn 1437-3262
dc.identifier.uri http://hdl.handle.net/20.500.12468/722
dc.description.abstract LA-MC-ICP-MS U–Pb zircon ages and wholerock geochemical data obtained from volcanic rocks erupted in the northern margin of Gondwana provide new insights on the polyphase magmatic evolution of the NW Iberian domain during the establishment of passive margin conditions in Lower Paleozoic times. The U–Pb data show crystallization ages of ca. 455 Ma for two calc-alkaline rhyolites sampled in the Upper Parautochthon of the eastern Galicia—Trás-os-Montes Zone (GTMZ) and for an intraplate basalt intruded into Middle Ordovician slates of the autochthonous series of the Central Iberian Zone (CIZ). Together with previous data, the ages obtained reveal a periodic magmatic activity across the northern Gondwana margin during the Lower Paleozoic, which is comparable to that observed in NE Iberia and in other massifs of the Mediterranean realm. Both geochronological and geochemical data reinforce paleontological and stratigraphic evidences for paleogeographic proximity between these domains and contribute to the recognition of extensional-related magmatism along the northern margin of Central Gondwana associated with the opening of the Rheic Ocean. es_ES
dc.description.sponsorship Instituto Dom Luiz, Universidade de Lisboa, Portugal es_ES
dc.description.sponsorship Departamento de Geociências, Instituto Dom Luiz, Universidade de Évora, Portugal es_ES
dc.description.sponsorship Department of Geological Sciences, University of Florida, Estados Unidos es_ES
dc.description.sponsorship Unidad de Salamanca, Instituto Geológico y Minero de España, España es_ES
dc.language.iso en es_ES
dc.publisher Springer es_ES
dc.relation CGL2007-65338-C02-02/BTE es_ES
dc.relation CGL2011-22728 es_ES
dc.rights Acceso abierto es_ES
dc.subject Ordovician volcanics es_ES
dc.subject Continental rifting es_ES
dc.subject Passive Margin es_ES
dc.subject Northern Gondwana es_ES
dc.subject Rheic Ocean es_ES
dc.subject Iberian Massif es_ES
dc.title Magmatic evolution in the N‑Gondwana margin related to the opening of the Rheic Ocean—evidence from the Upper Parautochthon of the Galicia‑Trás‑os‑Montes Zone and from the Central Iberian Zone (NW Iberian Massif) es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://link.springer.com/article/10.1007/s00531-015-1232-9 es_ES
dc.description.funder Instituto Geológico y Minero de España, España es_ES
dc.description.funder Instituto Dom Luiz, Universidade de Lisboa, Portugal es_ES
dc.identifier.doi https://doi.org/10.1007/s00531-015-1232-9 es_ES
dc.coverage.spatialStudy Península Ibérica es_ES


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