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Detrital zircon geochronology of the Carboniferous Baixo Alentejo Flysch Group (South Portugal); constraints on the provenance and geodynamic evolution of the South Portuguese Zone

2015-05Journal article Open access
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dc.contributor.authorRodrigues, B.
dc.contributor.authorChew, David
dc.contributor.authorJorge, Raul CG Santos
dc.contributor.authorFernandes, Paulo
dc.contributor.authorPires, Cristina Veiga
dc.contributor.authorOliveira, José Tomás
dc.date.accessioned2015-07-25T17:33:08Z
dc.date.available2015-07-25T17:33:08Z
dc.date.issued2015-05
dc.description.abstractU–Pb detrital zircon data from the Baixo Alentejo Flysch Group in the South Portuguese Zone show significant age differences between formations. The Visean Mértola Formation and Serpukhovian to early Bashkirian Mira Formation are dominated by zircons in the 316–388?Ma age range, whereas the late Bashkirian to late Moscovian Brejeira Formation is dominated by zircons with an age range of 498–687?Ma. Detrital zircons spanning an age range of 0.9–1.1?Ga are present in the Brejeira Formation but are absent in the Mértola and Mira formations. Detrital zircon ages of the Mértola and Mira formations indicate provenance from an extra-basinal source (Ossa–Morena Zone) with a minor intra-basinal contribution (South Portuguese Zone). The abundant presence of detrital zircon with age ranges of 500–750 and 0.9–1.1?Ga in the Brejeira Formation suggests a sediment source from the Avalon–Meguma terranes with limited recycling from the SW Portugal Domain. The different inferred source areas for the Baixo Alentejo Flysch Group formations are attributed to the presence of a forebulge that was formed in Mid-Visean times during the foreland phase of the South Portuguese Zone. The forebulge acted as a physical barrier separating sub-basins that accumulated the Mértola–Mira and Brejeira sediments respectively.por
dc.identifier.citationRodrigues, B... [et al.] - Detrital zircon geochronology of the Carboniferous Baixo Alentejo Flysch Group (South Portugal); constraints on the provenance and geodynamic evolution of the South Portuguese Zone. In: Journal of the Geological Society, Vol. 172, Part 3 (May 2015), p. 294-308por
dc.identifier.doihttp://dx.doi.org./10.1144/jgs2013-084
dc.identifier.issn0016-7649
dc.identifier.urihttp://hdl.handle.net/10400.9/2841
dc.language.isoengpor
dc.subjectGeocronologiapor
dc.subjectEvolução geodinâmicapor
dc.subjectEstratigrafia regionalpor
dc.subjectFlyschpor
dc.subjectCarbónicopor
dc.subjectBaixo Alentejo (Portugal)por
dc.subjectZona Sul Portuguesapor
dc.subjectPortugal (Sul)por
dc.titleDetrital zircon geochronology of the Carboniferous Baixo Alentejo Flysch Group (South Portugal); constraints on the provenance and geodynamic evolution of the South Portuguese Zonepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceLondon, U. K.por
oaire.citation.titleJournal of the Geological Societypor
person.familyNameChew
person.familyNameJorge
person.familyNameFernandes
person.givenNameDavid
person.givenNameRaul C. G. Santos
person.givenNamePaulo
person.identifier422469
person.identifier.ciencia-idDD16-D75D-34CF
person.identifier.ciencia-id051D-A133-65D9
person.identifier.orcid0000-0002-6940-1035
person.identifier.orcid0000-0002-3875-6538
person.identifier.orcid0000-0003-4888-0230
person.identifier.ridB-7828-2008
person.identifier.ridJ-6992-2013
person.identifier.ridJ-6577-2014
person.identifier.scopus-author-id24486420300
person.identifier.scopus-author-id55549552200
person.identifier.scopus-author-id57197129025
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication0dc09df0-8c8e-4daa-90d9-3ba3ba41f563
relation.isAuthorOfPublication5faef79f-55e2-467f-8343-ae4562e95197
relation.isAuthorOfPublicationb42caa3f-b216-443e-921f-a05b10543663
relation.isAuthorOfPublication.latestForDiscoveryb42caa3f-b216-443e-921f-a05b10543663

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