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Quaternary sedimentary processes on the Bahamas: From platform to abyss

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFAUQUEMBERGUE, Kelly
IDREF: 233247483
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUCASSOU, Emmanuelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMULDER, Thierry
dc.contributor.authorREIJMER, J. J. G.
dc.contributor.authorBORGOMANO, J.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorRECOUVREUR, Audrey
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
dc.contributor.authorBETZLER, C.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPRINCIPAUD, Melanie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHABAUD, Ludivine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFABREGAS, Natacha
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGIRAUDEAU, Jacques
dc.contributor.authorBOUT-ROUMAZEILLES, V.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMOAL, Paul
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPERELLO, Marie-Claire
dc.contributor.authorPOLI, E.
dc.date.accessioned2024-11-04T11:34:14Z
dc.date.available2024-11-04T11:34:14Z
dc.date.issued2023-05-01
dc.identifier.issn0025-3227en_US
dc.identifier.urioai:crossref.org:10.1016/j.margeo.2023.107044
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203115
dc.description.abstractEnUnderstanding the interaction between sediment production on and export from shallow-water areas of plat- forms and slopes is primordial when assessing sedimentary processes on a carbonate-platform scale. In this manuscript we explore variations in facies, sediment export, sediment deposition and reorganisation, hydro- acoustic- and small-scale sedimentary structures, but also assess the variability in current systems as observed during the Quaternary for the north-facing margin of Little Bahama Bank (LBB) and compare those characteristics with features observed on other slopes surrounding LBB and Great Bahama Bank (GBB). Over the past decade, the northern margin of LBB was explored during a series of oceanographic cruises of the CARAMBAR project, which included the collection of 24.270 km2 of bathymetry data, 6.398 km of very high- resolution seismic profiles, and 42 cores covering water depths ranging from 177 m to 4873 m. This study evaluates the results obtained from the analysis of sediment cores retrieved in the Great Abaco Canyon area (GAC), located between the lower northern LBB slope, which is connected to the abyssal plain. The analysis of the shallower parts of the LBB slope relies on earlier studies and are complementary to our data, and allow for a detailed analysis of the sedimentary processes acting along the entire LBB slope. The data reveal that Quaternary sediment distribution differs when moving from the northeastern to the north-western LBB slope. The entire LBB slope is dissected by numerous canyons. Gravity processes enriched in coarse platform components occur infrequently and are concentrated within lobes in the east. Only coarse- grained rich bank facies can concentrate coarse grains on this margin. The western LBB slope is mostly influenced by fine-grained platform export and current circulation. The deeper GAC area is dominated by pelagic sediments that are supplied from the canyon sides and through tributaries. The sediment composition confirms that pelagic sediment production and current movements determine the sediment-deposition and redistribution processes at this site. The comparison with other Bahamian slopes demonstrates that a leeward position agrees with high sedimentation rates on the slopes resulting in specific morphologic structures, such as gullies and sediment waves, related to fine-grained sediment export, whereas platform-derived coarse-grained facies are deposited down- stream in larger structures, such as canyons, that are not affected by the main wind direction. Slope angle could also have an impact on grain-size export, as it appears that coarse-grained deposits are frequent on steep slopes like those bordering the Exuma Sound basin.
dc.language.isoENen_US
dc.sourcecrossref
dc.subject.enCarbonate
dc.subject.enSlope
dc.subject.enBahamas
dc.subject.enQuaternary
dc.subject.enLeeward vs. Windward Sediment processes
dc.title.enQuaternary sedimentary processes on the Bahamas: From platform to abyss
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.margeo.2023.107044en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalMarine Geologyen_US
bordeaux.page107044en_US
bordeaux.volume459en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
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=2023-05-01&rft.volume=459&rft.spage=107044&rft.epage=107044&rft.eissn=0025-3227&rft.issn=0025-3227&rft.au=FAUQUEMBERGUE,%20Kelly&DUCASSOU,%20Emmanuelle&MULDER,%20Thierry&REIJMER,%20J.%20J.%20G.&BORGOMANO,%20J.&rft.genre=article


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