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Geodynamic evolution of the South Variscan Iberian Suture as recorded by mineral transformations

2002-03Artigo científico Acesso aberto
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dc.contributor.authorFigueiras, Jorge
dc.contributor.authorA., Mateus
dc.contributor.authorA. Gonçalves, Mário
dc.contributor.authorWaerenborgh, João
dc.contributor.authorFonseca, Paulo
dc.date.accessioned2022-08-02T09:48:15Z
dc.date.available2022-08-02T09:48:15Z
dc.date.issued2002-03
dc.description.abstractNew structural, petrographic, mineralogical and geochemical data from the Beja-Acebuches Ophiolite Complex (BAOC) are presented, and reviewed together with data published elsewhere. The new data obtained shed light on questions such as: 1) the relative importance of the obduction event; 2) its geological record in the deep levels of BAOC; 3) the nature and intensity of the Variscan metamorphism and deformation during subsequent continental (arc) collision; 4) the age relationships between BAOC and the Beja Igneous Complex; and 5) by means of numerical modelling, the thermal metamorphism of the Ossa-Morena autochthonous terranes induced by the ophiolite obduction. The emerging picture is that of a fairly simple overall geological evolution for BAOC, seamlessly integrated within the evolution of the southern branch of the Iberian Variscides. Obduction of BAOC is a relatively minor early event in the general NE–SW convergence that gave rise to the orogen as seen regionally and is recorded by an anisotropic, high-temperature, metamorphic fabric at the gabbro levels and by subtle features of the chemical composition of primary minerals at the underlying peridotite level; it caused chilling of the obducted ophiolitic slab and no significant metamorphism on the autochtonous rocks of the Ossa-Morena Zone. BAOC underwent most of its deformation and (amphibolite facies) metamorphism during a later collisional event, that took place as the most primitive rocks of the Beja Igneous complex were being intruded, and whose waning stages are responsible for extensive serpentinisation of peridotites and for important aquocarbonic fluid discharges along the semibrittle–brittle shear zones meanwhile developed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/S0985-3111(01)01078-6pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/54003
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor and Francispt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0985311101010786pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectBeja-Acebuches Ophiolite Complexpt_PT
dc.subjectMineral transformationspt_PT
dc.titleGeodynamic evolution of the South Variscan Iberian Suture as recorded by mineral transformationspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage61pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage45pt_PT
oaire.citation.titleGeodinamica Actapt_PT
oaire.citation.volume15pt_PT
person.familyNameNunes Mateus
person.familyNameCarreira Gonçalves
person.familyNameTalhadas Ferreira da Fonseca
person.givenNameAntónio Manuel
person.givenNameMário Abel
person.givenNamePaulo Emanuel
person.identifierD-3727-2011
person.identifierB-4751-2008
person.identifierhttps://scholar.google.pt/citations?user=XgXM_fkAAAAJ&hl=pt-PT
person.identifier.ciencia-id3012-5AFF-429F
person.identifier.ciencia-idDB18-804D-DAB7
person.identifier.ciencia-idF21B-90F8-A5DC
person.identifier.orcid0000-0003-2623-1539
person.identifier.orcid0000-0002-1898-0727
person.identifier.orcid0000-0003-2068-4895
person.identifier.scopus-author-id6701374691
person.identifier.scopus-author-id7202320464
person.identifier.scopus-author-idhttps://www2.scopus.com/authid/detail.uri?authorId=7005166336
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication48cb5c2a-66a8-4389-a848-80813db2c9b0
relation.isAuthorOfPublication73f9d07d-0de8-4500-8908-9722df62dba5
relation.isAuthorOfPublicationd7be0fc4-4c91-4b3a-b082-456646b239f2
relation.isAuthorOfPublication.latestForDiscoveryd7be0fc4-4c91-4b3a-b082-456646b239f2

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