New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone

New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone

New SHRIMP U-Pb zircon ages for the Portalegre and Alcáçovas orthogneisses document a complex pre- Variscan history for the Iberian basement in Portugal. The available geochemical and geochronological data for the Alcáçovas orthogneiss (ca. 540 Ma) tend to favor its involvement in a Cadomian orogeni...

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Bibliographic Details
Main Authors: Cordani Umberto G., Nutman Allen P., Andrade Antonio S., Santos José F., Azevedo Maria do Rosário, Mendes Maria Helena, Pinto Manuel S.
Format: Article
Language:English
Published: Academia Brasileira de Ciências 2006-01-01
Series:Anais da Academia Brasileira de Ciências
Subjects:
Cadomian orogeny
U-Pb geochronology
Iberian Massif
Ossa-Morena Zone
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100013

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http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100013

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