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http://hdl.handle.net/10773/13028
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cordani, U. G. | pt |
dc.contributor.author | Nutman, A. P. | pt |
dc.contributor.author | Andrade, A. S. | pt |
dc.contributor.author | Santos, J. F. | pt |
dc.contributor.author | Azevedo, M. do Rosário | pt |
dc.contributor.author | Mendes, M. H. | pt |
dc.contributor.author | Pinto, M. S. | pt |
dc.date.accessioned | 2014-12-17T15:57:44Z | - |
dc.date.available | 2014-12-17T15:57:44Z | - |
dc.date.issued | 2006 | - |
dc.identifier.issn | 0001-3765 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/13028 | - |
dc.description.abstract | 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 orogenic event. This is consistent with the development of an active continental margin setting at the end of the Proterozoic and supports a Gondwanan provenance for the Iberian crust. On the other hand, the Ordovician emplacement age obtained for the magmatic precursors of the Portalegre orthogneisses (497 ± 10 Ma) provides additional evidence for the occurrence of rift-related magmatic activity during the Lower Paleozoic. | pt |
dc.language.iso | eng | pt |
dc.publisher | Academia Brasileira de Ciências | pt |
dc.relation | FCT - POCTI/1999/CTA/35630 | pt |
dc.rights | openAccess | por |
dc.subject | Cadomian orogeny | pt |
dc.subject | Iberian Massif | pt |
dc.subject | Ossa-Morena Zone | pt |
dc.subject | U-Pb geochronology | pt |
dc.title | New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-morena tectonic zone | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
ua.event.title | Anais da Academia Brasileira de Ciencias | |
degois.publication.firstPage | 133 | pt |
degois.publication.issue | 1 | pt |
degois.publication.issue | 1 | |
degois.publication.lastPage | 149 | pt |
degois.publication.title | Anais da Academia Brasileira de Ciências | pt |
degois.publication.volume | 78 | pt |
dc.identifier.doi | 10.1590/S0001-37652006000100013 | pt |
Appears in Collections: | DGeo - Artigos |
Files in This Item:
File | Description | Size | Format | |
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a13v78n1.pdf | documento principal | 435.11 kB | Adobe PDF | View/Open |
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