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Morphological evolution of Cap Lopez Canyon (Gabon): Illustration of lateral migration processes of a submarine canyon

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBISCARA, Laurie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMULDER, Thierry
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARIEU, Vincent
dc.contributor.authorCRESPIN, Jean-Pierre
dc.contributor.authorBRACCINI, Eric
dc.contributor.authorGARLAN, Thierry
dc.date.accessioned2024-11-13T10:08:26Z
dc.date.available2024-11-13T10:08:26Z
dc.date.issued2013-06-01
dc.identifier.issn0025-3227en_US
dc.identifier.urihttps://www.researchgate.net/publication/277368846_Morphological_evolution_of_Cap_Lopez_Canyon_Gabon_Illustration_of_lateral_migration_processes_of_a_submarine_canyon
dc.identifier.urioai:crossref.org:10.1016/j.margeo.2013.04.014
dc.identifier.urioai:researchgate.net:277368846
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203223
dc.description.abstractEnComparison of bathymetric data on short time scales (1959-2008) is used to provide new insights into the modem sedimentary dynamics of the Cap Lopez Canyon (Gabon, West Africa). The canyon head evolution is characterized by a north-eastward lateral migration of similar to 180 m between 1959 and 2008. The evolution of the coastline position over the same period highlights the strong relationship between the probable increase of the longshore transport related to the smoothing of the coast and the morphological evolution of the canyon head. Lateral migration of the thalweg from the inner bend to the outer bend is estimated between 77 and 190 m (or between 1.6 and 3.8 m/year), leading to an increase of the sinuosity (from 1-1.5 in 1959 to 13-3.6 in 2008). The migration of the thalweg is associated with strong erosion on the outer bends (up to 60 m) and sediment deposition on the inner bends (up to 25 m). Both the absence of overbank deposits and the developing point-bar morphology may reflect that equilibrium flows are the most frequent flows encountered in the Cap Lopez Canyon. Although erosion of the outer bends is the result of slope failures and steady erosional processes, our study suggests that erosion related to the transit of sediment gravity flows would be the predominant process.
dc.language.isoENen_US
dc.sourcecrossref
dc.sourceresearchgate
dc.title.enMorphological evolution of Cap Lopez Canyon (Gabon): Illustration of lateral migration processes of a submarine canyon
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.margeo.2013.04.014en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalMarine Geologyen_US
bordeaux.page49-56en_US
bordeaux.volume340en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamGEOLSEDen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04779795
hal.version1
hal.date.transferred2024-11-13T10:08:29Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Marine%20Geology&rft.date=2013-06-01&rft.volume=340&rft.spage=49-56&rft.epage=49-56&rft.eissn=0025-3227&rft.issn=0025-3227&rft.au=BISCARA,%20Laurie&MULDER,%20Thierry&HANQUIEZ,%20Vincent&MARIEU,%20Vincent&CRESPIN,%20Jean-Pierre&rft.genre=article


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