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Origin and architecture of a Mass Transport Complex on the northwest slope of Little Bahama Bank (Bahamas): Relations between off-bank transport, bottom current sedimentation and submarine landslides

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorTOURNADOUR, Elsa
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMULDER, Thierry
dc.contributor.authorBORGOMANO, J.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUCASSOU, Emmanuelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGILLET, Herve
dc.date.accessioned2024-06-18T09:32:09Z
dc.date.available2024-06-18T09:32:09Z
dc.date.issued2014-10-01
dc.identifier.issn0037-0738en_US
dc.identifier.urihttps://www.researchgate.net/publication/267100544_Origin_and_architecture_of_a_Mass_Transport_Complex_on_the_northwest_slope_of_Little_Bahama_Bank_Bahamas_Relations_between_off-bank_transport_bottom_current_sedimentation_and_submarine_landslides
dc.identifier.urioai:crossref.org:10.1016/j.sedgeo.2014.10.003
dc.identifier.urioai:researchgate.net:267100544
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200523
dc.description.abstractEnThe analysis of the sedimentary dynamics of the carbonate slope of the northwest part of Little Bahama Bank (LBB, Bahamas) reveals a complex interaction between slope destabilisations, off-bank sediment export and longitudinal transport, the latter being driven by the Antilles and the Florida currents, at the northern end of the Florida Strait. Their combined action since the middle Miocene resulted in an extensional growth slope, previously called ‘LBB Drift’ (Mullins et al., 1980). Deposition within this extensional growth slope is dominated by either platform-derived downslope sedimentation or bottom current sedimentation. The latter induces the formation of a plastered drift, showing both upslope and downslope migrations, which do not correspond to the ‘LBB Drift’ as described by Mullins et al. (1980). Interestingly, a large submarine landslide affects the upper part of this plastered drift, and displays a complex and striking geomorphology on the seafloor. A new high-quality multibeam echosounder and seismic dataset allowed a detailed characterisation of the architecture of this Mass Transport Complex (MTC). A 44 km-long circular incision at 275 m and 460 m water depths, with a steep external edge (from 40 to 70 m high), forms the only present day evidence of this ancient MTC. It comprises confined Mass Transport Deposits (MTDs), which are delimited by frontal and lateral edges that developed inside the plastered drift. The top of this plastered drift is marked by a major erosional surface, most likely induced by an increase in oceanic current circulation. Channelised geometries, laterally associated with overspill deposits, developed within the depression induced by the MTC, and are an additional evidence of bottom current activity in this area. In addition, recent pockmarks are visible on the seafloor in front of the circular scarp of the MTC and probably relate to fluid escape, originating from the underlying MTDs' compressional area.
dc.language.isoENen_US
dc.sourcecrossref
dc.sourceresearchgate
dc.title.enOrigin and architecture of a Mass Transport Complex on the northwest slope of Little Bahama Bank (Bahamas): Relations between off-bank transport, bottom current sedimentation and submarine landslides
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.sedgeo.2014.10.003en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalSedimentary Geologyen_US
bordeaux.page9-26en_US
bordeaux.volume317en_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-04615567
hal.version1
hal.date.transferred2024-06-18T09:32:10Z
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=Sedimentary%20Geology&rft.date=2014-10-01&rft.volume=317&rft.spage=9-26&rft.epage=9-26&rft.eissn=0037-0738&rft.issn=0037-0738&rft.au=TOURNADOUR,%20Elsa&MULDER,%20Thierry&BORGOMANO,%20J.&HANQUIEZ,%20Vincent&DUCASSOU,%20Emmanuelle&rft.genre=article


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