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A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating
dc.contributor.author | Bea Barredo, Fernando | |
dc.contributor.author | González Montero, Pilar | |
dc.contributor.author | Talavera Rodríguez, Cristina | |
dc.contributor.author | Zinger, Tatiana | |
dc.date.accessioned | 2014-06-02T07:07:57Z | |
dc.date.available | 2014-06-02T07:07:57Z | |
dc.date.issued | 2006 | |
dc.identifier.citation | Bea Barredo, F.; et al. A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating. Geologica Acta, 4(3): 395-401 (2006). [http://hdl.handle.net/10481/32070] | es_ES |
dc.identifier.issn | 1695-6133 | |
dc.identifier.issn | 1696-5728 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/32070 | |
dc.description.abstract | The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, on the base of a U-Pb discordia upper intercept of 618 ± 9 Ma. Nevertheless, new ion-microprobe and LA-ICPMS U-Pb zircon dating revealed that the crystallization age was 483 ± 3 Ma. The orthogneiss also contains a 605 ± 13 Ma zircon population that indicates that the source-rock for the Ordovician magma was Pan-African. Moreover, a few ~3.17 Ga zircon grains were also recorded. These grains are the oldest found so far in Iberia, and its occurrence would suggest the involvement of an Archean crust in the Pan-African orogeny. | es_ES |
dc.description.sponsorship | This work was financially supported supported by the Spanish DGCYT grant BTE2002-04618-C02-01, the SYNTHESIS grant SE-TAF 528 and the NATO Collaborative Project EST-CLG-978997. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Universidad de Barcelona; Instituto de Ciencias de la Tierra Jaume Almera | es_ES |
dc.rights | Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | |
dc.subject | U-Pb dating | es_ES |
dc.subject | Ollo de Sapo | es_ES |
dc.subject | Pre-Variscan | es_ES |
dc.subject | Central Iberian Zone | es_ES |
dc.subject | Gneiss | es_ES |
dc.title | A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating | es_ES |
dc.type | journal article | es_ES |
dc.rights.accessRights | open access | es_ES |