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dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUBOSQ, Nicolas
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSCHMIDT, Sabine
IDREF: 131836129
dc.contributor.authorWALSH, J.P.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGREMARE, Antoine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGILLET, Herve
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLEBLEU, Pascal
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPOIRIER, Dominique
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPERELLO, Marie-Claire
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLAMARQUE, Bastien
IDREF: 257511881
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDEFLANDRE, Bruno
IDREF: 170923509
dc.date.accessioned2023-11-15T11:14:14Z
dc.date.available2023-11-15T11:14:14Z
dc.date.issued2021-05-15
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/184769
dc.description.abstractEnOn the Bay of Biscay continental shelf, there are several mid-shelf mud patches including La Grande Vasière to the north, the West Gironde Mud Patch (WGMP) off the Gironde estuary and the Basque Mud Patch close to the Spanish border. In general, these deposits are several meters thick and cover coarser substrate. Questions remain about their storage capability for fine particles and carbon. This work investigates the sedimentation of the WGMP in order to develop a first estimate of organic carbon (OC) burial. Interface sediment cores were collected at nine stations along two cross-shelf transects in October–November 2016. X-radiograph imaging and grain-size analyses were used to characterize sedimentary structures. 210Pbxs depth profiles were established to calculate sediment (SAR) and mass (MAR) accumulation rates. Sedimentary structures indicate episodic sandy inputs overlying older deposits at proximal sites, and relatively continuous sedimentation at seaward locations. On the outer-central portion of the northern transect, a maximum SAR (0.47 cm yr−1) was observed, suggesting a depocenter. On the southern transect, excluding two stations where sedimentary inputs appear massive but sporadic, the SARs are lower (<0.3 cm yr−1). Quantitative estimates of OC burial rates increase seaward with a maximum of 45 gC m−2 yr−1. To evaluate carbon loading independent of grain-size variability, OC values were normalized to surface area of sediments (SA). Interestingly, a qualitative comparison of OC burial efficiencies using the OC/SA ratio highlights three groups of sites (low, medium and relatively high OC burial efficiency) which are likely related both to different sedimentary environments and variable deposition conditions linked to local environmental conditions and depth. This work highlights the likely control of hydrodynamic intensity and sedimentary inputs on the amount of OC stored in the WGMP sediments.
dc.language.isoENen_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subject.enAssessment Method
dc.subject.enAtlantic Ocean
dc.subject.enBasque Country [Spain]
dc.subject.enBay Of Biscay
dc.subject.enBurial Diagenesis
dc.subject.enContinental Shelf
dc.subject.enEnvironmental Conditions
dc.subject.enFrance
dc.subject.enGironde Estuary
dc.subject.enLa Grande
dc.subject.enOregon
dc.subject.enOrganic Carbon
dc.subject.enSediment Core
dc.subject.enSedimentation
dc.subject.enSpain
dc.subject.enUnited States
dc.title.enA first assessment of organic carbon burial in the West Gironde Mud Patch (Bay of Biscay)
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.csr.2021.104419en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalContinental Shelf Researchen_US
bordeaux.volume221en_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
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
dc.rights.ccCC BY-NC-NDen_US
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Continental%20Shelf%20Research&amp;rft.date=2021-05-15&amp;rft.volume=221&amp;rft.au=DUBOSQ,%20Nicolas&amp;SCHMIDT,%20Sabine&amp;WALSH,%20J.P.&amp;GREMARE,%20Antoine&amp;GILLET,%20Herve&amp;rft.genre=article


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