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Monsoon control on channel avulsions in the Late Quaternary Congo Fan

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire Géosciences Océan [LGO]
dc.contributor.authorPICOT, M.
hal.structure.identifierInstitut Français de Recherche pour l'Exploitation de la Mer [IFREMER]
dc.contributor.authorMARSSET, T.
hal.structure.identifierLaboratoire Géosciences Océan [LGO]
dc.contributor.authorDROZ, L.
hal.structure.identifierInstitut Français de Recherche pour l'Exploitation de la Mer [IFREMER]
dc.contributor.authorDENNIELOU, B.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorBAUDIN, François
dc.contributor.authorHERMOSO, M.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorDE RAFELIS, M.
hal.structure.identifierInstitut Français de Recherche pour l'Exploitation de la Mer [IFREMER]
dc.contributor.authorSIONNEAU, T.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCREMER, M.
hal.structure.identifierInstitut Français de Recherche pour l'Exploitation de la Mer [IFREMER]
dc.contributor.authorLAURENT, D.
dc.contributor.authorBEZ, M.
dc.date.accessioned2024-02-27T12:05:00Z
dc.date.available2024-02-27T12:05:00Z
dc.date.issued2019
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188453
dc.description.abstractEnThe mechanisms governing the development of deep-sea fans is a matter of debate and their understanding at Milankovitch and millenial time-scales is challenged by complex architectures and the lack of material suitable for establishing reliable chronostratigraphies. Based on a detailed investigation of the emplacement of channel-levee-lobe systems and their successive bifurcations and seaward-landward migrations (Picot et al., 2016), we present for the last 210 ka a detailed chronostratigraphic framework of the migration pattern based mainly on radiocarcarbon dating of channels and lobes abandonment or initiation. The comparison of architectural cycles to proxies of external factors (sea-level and climate) suggest that sea-level changes have minor impacts on the architectural evolution of the Congo Fan. In contrast, comparison with climate and environmental proxies (West African monsoon, pollen grain assemblages, Kaolinite/Smectite) evidences a major impact on the timing of the development of the architectural pattern, at least for the last 38 kyr. A general scheme of the growth pattern of the Congo Fan in link with climate evolution is proposed: the stacking pattern of the Congo Fan responds to humidity/aridity cycles that generate successive progradation and retrogradation of avulsion points. These climate changes are under the control of the West African monsoon which, by controlling the rainfall and vegetation on the watershed, ultimately impacts the composition and volume of the sediment source and the transport capacity of gravity flow generated in the canyon and flowing in the turbiditic channels.
dc.language.isoENen_US
dc.subject.enQuaternary
dc.subject.enMonsoon
dc.subject.enSouth atlantic
dc.subject.enSedimentology-marine cores
dc.subject.enCongo
dc.subject.enTurbidite system
dc.subject.enSub-bottom profiles
dc.title.enMonsoon control on channel avulsions in the Late Quaternary Congo Fan
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2018.11.033en_US
dc.subject.halPlanète et Univers [physics]en_US
bordeaux.journalQuaternary Science Reviewsen_US
bordeaux.page149-171en_US
bordeaux.volume204en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamSEDIMen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierinsu-03595804
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quaternary%20Science%20Reviews&rft.date=2019&rft.volume=204&rft.spage=149-171&rft.epage=149-171&rft.au=PICOT,%20M.&MARSSET,%20T.&DROZ,%20L.&DENNIELOU,%20B.&BAUDIN,%20Fran%C3%A7ois&rft.genre=article


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