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The post-breakup magmatism in Cabo Frio High, Campos Basin, Brazil: implications to a thinned lithosphere contribution in magma formation

2023-10Journal article Open access
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dc.contributor.authorDe Barros, Tatiele
dc.contributor.authorCastro De Brito, Priscila
dc.contributor.authorCorval Vieira, Artur
dc.contributor.authorValente, Sérgio De Castro
dc.contributor.authorMiranda, Alan
dc.date.accessioned2023-12-05T15:38:43Z
dc.date.available2023-12-05T15:38:43Z
dc.date.issued2023-10
dc.description.abstractABSTRACT: The Cabo Frio High, limit between Campos and Santos basins, consists of an elevated structure characterized by intense magmatism. Through new petrographic and geochemical data, this paper brings new highlights on sources and evolutionary processes associated with volcanic events that affected this area during Santonian-Campanian drifting stage. Samples from three studied wells are pyroclastic ash, lapilli tuffs, basalts, scoria and diabases associated with subaerial explosive volcanism. Geochemically, they are alkaline rocks classified as basalts, alkaline basalts, foidites and tephriphonolites. The evolution of these rocks derives from geodynamic processes that occurred in shallow mantle depths (35 – 80 km) and involved mixing between a depleted, relatively shallow asthenospheric source (N-MORB) and the local subcontinental lithospheric mantle represented by the average composition of the lamprophyres at the Cabo Frio Structural High.pt_PT
dc.description.abstractRESUMO: O Alto de Cabo Frio, limite entre as bacias de Campos e Santos, é uma estrutura elevada caracterizada por intenso magmatismo. Novos dados petrográficos e geoquímicos deste trabalho fornecem novas perspetivas acerca das fontes e processos evolucionários associados a eventos vulcânicos que afetaram esta área durante o Santoniano-Campaniano. Amostras de poços estudados são cinzas piroclásticas, lapilli tufos, basaltos, escórias e diabásios associados com um vulcanismo subaéreo explosivo. Geoquimicamente, são rochas alcalinas classificadas como basaltos, basaltos alcalinos, foiditos e tefrifonolitos. A evolução dessas rochas deriva de processos geodinâmicos que ocorreram a profundidades reduzidas no manto (35 – 80 km) e envolveram a mistura entre uma fonte astenosférica relativamente superficial e esvaziada (N-MORB) e o manto litosférico subcontinental local representado pela composição média dos lamprófiros do Alto Estrutural de Cabo Frio.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBarros, Tatiele... et.al - The post-breakup magmatism in Cabo Frio High, Campos Basin, Brazil: implications to a thinned lithosphere contribution in magma formation. In: Comunicações Geológicas, 2023, vol. 110, nº 1, p. 39-60pt_PT
dc.identifier.doi10.34637/h145-3n13pt_PT
dc.identifier.eissn1647-581X
dc.identifier.issn0873-948X
dc.identifier.urihttp://hdl.handle.net/10400.9/4188
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherLNEG - Laboratório Nacional de Energia e Geologiapt_PT
dc.relation.publisherversionhttps://doi.org/10.34637/h145-3n13pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectVolcanismpt_PT
dc.subjectLithogeochemistrypt_PT
dc.subjectCabo Frio Highpt_PT
dc.subjectVulcanismopt_PT
dc.subjectLitogeoquímicapt_PT
dc.subjectAlto de Cabo Friopt_PT
dc.titleThe post-breakup magmatism in Cabo Frio High, Campos Basin, Brazil: implications to a thinned lithosphere contribution in magma formationpt_PT
dc.title.alternativeO magmatismo pós-fragmentação no Alto de Cabo Frio, Bacia de Campos, Brasil: implicações para a contribuição de uma litosfera adelgaçada na formação de magmapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage60pt_PT
oaire.citation.startPage39pt_PT
oaire.citation.titleComunicações Geológicaspt_PT
oaire.citation.volume110pt_PT
person.familyNameDe Barros
person.familyNameCastro de Brito
person.familyNameCorval Vieira
person.familyNameValente
person.familyNameMiranda
person.givenNameTatiele
person.givenNamePriscila
person.givenNameArtur
person.givenNameSérgio de Castro
person.givenNameAlan
person.identifier.orcid0009-0004-9399-0556
person.identifier.orcid0009-0004-7432-7425
person.identifier.orcid0000-0002-5154-2737
person.identifier.orcid0000-0002-7467-672X
person.identifier.orcid0000-0002-7531-2936
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd8337988-ee8a-420c-bbb8-feecdaa0986a
relation.isAuthorOfPublication27121178-99f8-490d-9610-ee115800a421
relation.isAuthorOfPublicationf28e5544-4f29-47b1-b92c-761ea8ec709c
relation.isAuthorOfPublicationd34e2dc5-8f8a-4a52-9585-c4e60f17982b
relation.isAuthorOfPublicatione50c55ed-3446-4fb0-858d-417831f0ce82
relation.isAuthorOfPublication.latestForDiscoverye50c55ed-3446-4fb0-858d-417831f0ce82

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Volume 110 (2023) Fascículo I