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Zircon U-Pb and Lu-Hf Constraints on the Paleo- to Mesoproterozoic Evolution of the Southwest Angolan Shield (Congo Craton) [Resumo]

2025-07Documento de conferência Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambiente
dc.contributor.authorFerreira, Ezequiel
dc.contributor.authorLehmann, Jeremie
dc.contributor.authorRodrigues, José Feliciano
dc.contributor.authorHayes, Ben
dc.contributor.authorMerino-Martinez, Enrique
dc.contributor.authorMilani, Lorenzo
dc.contributor.authorBybee, Grant M.
dc.contributor.authorSmith, Trishya M. Owen
dc.contributor.authorGarcía-Lobón, J. L.
dc.contributor.authorTassinari, Colombo C. G.
dc.contributor.authorUeckermann, Henriette
dc.contributor.authorSato, Kei
dc.contributor.authorSilva, Paulo Bravo
dc.contributor.authorCorreia, João
dc.contributor.authorLabaredas, José
dc.contributor.authorDuarte, Laurent
dc.contributor.authorMolekwa, Mmasetena Anna
dc.contributor.authorManuel, José
dc.contributor.authorVictorino, Américo da Mata
dc.date.accessioned2026-02-11T16:54:36Z
dc.date.available2026-02-11T16:54:36Z
dc.date.issued2025-07
dc.description.abstractABSTRACT: The crustal evolution of the Angolan Shield (AS) remains poorly constrained. To address this, we analysed U-Pb and Lu-Hf isotopes in detrital and igneous zircons to determine the age and provenance of extensive sedimentary strata in southwest Angola, and use them as a proxy for the Paleoproterozoic to Mesoproterozoic evolution of the southwest AS. Mesoproterozoic maximum depositional ages between 1334 ± 8 Ma and 1184 ± 23 Ma for the Iona, Cahama, and Ompupa siliciclastic rocks refute previous correlations with the Paleoproterozoic Chela Group. Detrital zircon U-Pb and Lu-Hf isotopes closely match those of magmatic rocks from the southwest AS, indicating that Mesoproterozoic siliciclastic rocks were primarily derived from the AS.eng
dc.identifier.citationFerreira, E., Lehmann, J., Rodrigues, J.F., Hayes, B., Merino-Martinez, E., Milani, L., Bybee, G.M., Smith, T.M.O., García-Lobón, J.L., Tassinari, C.C.G., Ueckermann, H., Sato, K., Silva, P.B., Correia, J ., Labaredas, J., Duarte, L., Molekwa, M.A., Manuel, J. & Victorino, A.D.L. (2025). Zircon U-Pb and Lu-Hf Constraints on the Paleo-to Mesoproterozoic Evolution of the Southwest Angolan Shield (Congo Craton). In: Goldschmidt2025 - International Conference on Geochemistry, Abstract 28232, Prague, Czech Republic, 6-11 July, 2025. https://doi.org/10.7185/gold2025.28232
dc.identifier.doi10.7185/gold2025.28232
dc.identifier.urihttp://hdl.handle.net/10400.9/6258
dc.language.isoeng
dc.peerreviewedno
dc.publisherGeochemical Society
dc.relation.hasversionhttps://goldschmidtabstracts.info/abstracts/abstractView?doi=10.7185/gold2025.28232
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectU-Pb geochronology
dc.subjectZircon
dc.subjectMesoproterozoic igneous
dc.subjectCrustal evolution
dc.subjectAngola (Southwest)
dc.titleZircon U-Pb and Lu-Hf Constraints on the Paleo- to Mesoproterozoic Evolution of the Southwest Angolan Shield (Congo Craton) [Resumo]eng
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferenceDate2025-07
oaire.citation.conferencePlacePrague, Czech Republic
oaire.citation.titleGoldschmidt2025
oaire.versionhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43
person.familyNameRodrigues
person.givenNameJosé Feliciano
person.identifier.orcid0000-0001-8246-9379
relation.isAuthorOfPublication8a316992-104c-4157-af2e-3981eabe75ff
relation.isAuthorOfPublication.latestForDiscovery8a316992-104c-4157-af2e-3981eabe75ff

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