Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay

Autores
Schmidt, Sabine; Howa, Héléne; Diallo, Amy; Martín de Nascimento, Jacobo; Cremer, Michel; Duros, Pauline; Fontanier, Christophe; Deflandre, Bruno; Metzger, Edouard; Mulder, Thierry
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Cap-Ferret Canyon (CFC), a major morphologic feature of the eastern margin of the Bay of Biscay, occupies a deep structural depression that opens about 60 km southwest of the Gironde Estuary. Detailed depth profiles of the particle-reactive radionuclides 234Th and 210Pb in interface sediments were used to characterise the present sedimentation (bioturbation, sediment mass accumulation, and focusing) in the CFC region. Two bathymetric transects were sampled along the CFC axis and the southern adjacent margin. Particle fluxes were recorded from the nearby Landes Plateau by means of sediment traps in 2006 and 2007. This dataset provides a new and comprehensive view of particulate matter transfer in the Cap-Ferret Canyon region, through a direct comparison of the canyon with the adjacent southern margin. Radionuclide profiles (234Th and 210Pb) and mass fluxes demonstrate that significant particle dynamics occur on the SE Aquitanian margin in comparison with nearby margins. The results also suggest show three distinct areas in terms of sedimentary activity. In the upper canyon (<500 m), there is little net sediment accumulation, suggesting a by-pass area. Sediment focusing is apparent at the middle canyon (500–1500 m), that therefore acts as a depocenter for particles from the shelf and the upper canyon. The lower canyon (>2000 m) can be considered inactive at annual or decadal scales. In contrast with the slow and continuous accumulation of relatively fresh material that characterises the middle canyon, the lower canyon receives pulses of sediment via gravity flows on longer time scales. At decadal scale, the CFC can be considered as a relatively quiescent canyon. The disconnection of the CFC from major sources of sediment delivery seems to limit its efficiency in particle transfer from coastal areas to the adjacent ocean basin.
Fil: Schmidt, Sabine. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Howa, Héléne. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Diallo, Amy. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Martín de Nascimento, Jacobo. Consejo Superior de Investigaciones Cientificas. Instituto de Ciencias del Mar; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cremer, Michel. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Duros, Pauline. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Fontanier, Christophe. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Deflandre, Bruno. Universite de Bordeaux; Francia
Fil: Metzger, Edouard. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Mulder, Thierry. Universite de Bordeaux; Francia
Materia
Sediment Transport
Cap-Ferret Canyon
210pb
Sedimentation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/6855
Acceder
id CONICETDig_347bdf0f95914b2b65792156c9287f7e
oai_identifier_str oai:ri.conicet.gov.ar:11336/6855
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of BiscaySchmidt, SabineHowa, HéléneDiallo, AmyMartín de Nascimento, JacoboCremer, MichelDuros, PaulineFontanier, ChristopheDeflandre, BrunoMetzger, EdouardMulder, ThierrySediment TransportCap-Ferret Canyon210pbSedimentationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Cap-Ferret Canyon (CFC), a major morphologic feature of the eastern margin of the Bay of Biscay, occupies a deep structural depression that opens about 60 km southwest of the Gironde Estuary. Detailed depth profiles of the particle-reactive radionuclides 234Th and 210Pb in interface sediments were used to characterise the present sedimentation (bioturbation, sediment mass accumulation, and focusing) in the CFC region. Two bathymetric transects were sampled along the CFC axis and the southern adjacent margin. Particle fluxes were recorded from the nearby Landes Plateau by means of sediment traps in 2006 and 2007. This dataset provides a new and comprehensive view of particulate matter transfer in the Cap-Ferret Canyon region, through a direct comparison of the canyon with the adjacent southern margin. Radionuclide profiles (234Th and 210Pb) and mass fluxes demonstrate that significant particle dynamics occur on the SE Aquitanian margin in comparison with nearby margins. The results also suggest show three distinct areas in terms of sedimentary activity. In the upper canyon (<500 m), there is little net sediment accumulation, suggesting a by-pass area. Sediment focusing is apparent at the middle canyon (500–1500 m), that therefore acts as a depocenter for particles from the shelf and the upper canyon. The lower canyon (>2000 m) can be considered inactive at annual or decadal scales. In contrast with the slow and continuous accumulation of relatively fresh material that characterises the middle canyon, the lower canyon receives pulses of sediment via gravity flows on longer time scales. At decadal scale, the CFC can be considered as a relatively quiescent canyon. The disconnection of the CFC from major sources of sediment delivery seems to limit its efficiency in particle transfer from coastal areas to the adjacent ocean basin.Fil: Schmidt, Sabine. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; FranciaFil: Howa, Héléne. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; FranciaFil: Diallo, Amy. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; FranciaFil: Martín de Nascimento, Jacobo. Consejo Superior de Investigaciones Cientificas. Instituto de Ciencias del Mar; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Cremer, Michel. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; FranciaFil: Duros, Pauline. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; FranciaFil: Fontanier, Christophe. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; FranciaFil: Deflandre, Bruno. Universite de Bordeaux; FranciaFil: Metzger, Edouard. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; FranciaFil: Mulder, Thierry. Universite de Bordeaux; FranciaElsevier2014-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6855Schmidt, Sabine; Howa, Héléne; Diallo, Amy; Martín de Nascimento, Jacobo; Cremer, Michel; et al.; Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay; Elsevier; Deep Sea Research Part II: Topical Studies in Oceanography; 104; 3-2014; 134-1440967-0645enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0967064513002348info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2013.06.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:04Zoai:ri.conicet.gov.ar:11336/6855instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:05.092CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
title Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
spellingShingle Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
Schmidt, Sabine
Sediment Transport
Cap-Ferret Canyon
210pb
Sedimentation
title_short Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
title_full Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
title_fullStr Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
title_full_unstemmed Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
title_sort Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay
dc.creator.none.fl_str_mv Schmidt, Sabine
Howa, Héléne
Diallo, Amy
Martín de Nascimento, Jacobo
Cremer, Michel
Duros, Pauline
Fontanier, Christophe
Deflandre, Bruno
Metzger, Edouard
Mulder, Thierry
author Schmidt, Sabine
author_facet Schmidt, Sabine
Howa, Héléne
Diallo, Amy
Martín de Nascimento, Jacobo
Cremer, Michel
Duros, Pauline
Fontanier, Christophe
Deflandre, Bruno
Metzger, Edouard
Mulder, Thierry
author_role author
author2 Howa, Héléne
Diallo, Amy
Martín de Nascimento, Jacobo
Cremer, Michel
Duros, Pauline
Fontanier, Christophe
Deflandre, Bruno
Metzger, Edouard
Mulder, Thierry
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sediment Transport
Cap-Ferret Canyon
210pb
Sedimentation
topic Sediment Transport
Cap-Ferret Canyon
210pb
Sedimentation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Cap-Ferret Canyon (CFC), a major morphologic feature of the eastern margin of the Bay of Biscay, occupies a deep structural depression that opens about 60 km southwest of the Gironde Estuary. Detailed depth profiles of the particle-reactive radionuclides 234Th and 210Pb in interface sediments were used to characterise the present sedimentation (bioturbation, sediment mass accumulation, and focusing) in the CFC region. Two bathymetric transects were sampled along the CFC axis and the southern adjacent margin. Particle fluxes were recorded from the nearby Landes Plateau by means of sediment traps in 2006 and 2007. This dataset provides a new and comprehensive view of particulate matter transfer in the Cap-Ferret Canyon region, through a direct comparison of the canyon with the adjacent southern margin. Radionuclide profiles (234Th and 210Pb) and mass fluxes demonstrate that significant particle dynamics occur on the SE Aquitanian margin in comparison with nearby margins. The results also suggest show three distinct areas in terms of sedimentary activity. In the upper canyon (<500 m), there is little net sediment accumulation, suggesting a by-pass area. Sediment focusing is apparent at the middle canyon (500–1500 m), that therefore acts as a depocenter for particles from the shelf and the upper canyon. The lower canyon (>2000 m) can be considered inactive at annual or decadal scales. In contrast with the slow and continuous accumulation of relatively fresh material that characterises the middle canyon, the lower canyon receives pulses of sediment via gravity flows on longer time scales. At decadal scale, the CFC can be considered as a relatively quiescent canyon. The disconnection of the CFC from major sources of sediment delivery seems to limit its efficiency in particle transfer from coastal areas to the adjacent ocean basin.
Fil: Schmidt, Sabine. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Howa, Héléne. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Diallo, Amy. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Martín de Nascimento, Jacobo. Consejo Superior de Investigaciones Cientificas. Instituto de Ciencias del Mar; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cremer, Michel. Centre National de la Recherche Scientifique. Environnements et Paléoenvironnements Océaniques; Francia
Fil: Duros, Pauline. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Fontanier, Christophe. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Deflandre, Bruno. Universite de Bordeaux; Francia
Fil: Metzger, Edouard. LUNAM Université. Laboratoire des Bio-Indicateurs Actuels et Fossiles; Francia
Fil: Mulder, Thierry. Universite de Bordeaux; Francia
description The Cap-Ferret Canyon (CFC), a major morphologic feature of the eastern margin of the Bay of Biscay, occupies a deep structural depression that opens about 60 km southwest of the Gironde Estuary. Detailed depth profiles of the particle-reactive radionuclides 234Th and 210Pb in interface sediments were used to characterise the present sedimentation (bioturbation, sediment mass accumulation, and focusing) in the CFC region. Two bathymetric transects were sampled along the CFC axis and the southern adjacent margin. Particle fluxes were recorded from the nearby Landes Plateau by means of sediment traps in 2006 and 2007. This dataset provides a new and comprehensive view of particulate matter transfer in the Cap-Ferret Canyon region, through a direct comparison of the canyon with the adjacent southern margin. Radionuclide profiles (234Th and 210Pb) and mass fluxes demonstrate that significant particle dynamics occur on the SE Aquitanian margin in comparison with nearby margins. The results also suggest show three distinct areas in terms of sedimentary activity. In the upper canyon (<500 m), there is little net sediment accumulation, suggesting a by-pass area. Sediment focusing is apparent at the middle canyon (500–1500 m), that therefore acts as a depocenter for particles from the shelf and the upper canyon. The lower canyon (>2000 m) can be considered inactive at annual or decadal scales. In contrast with the slow and continuous accumulation of relatively fresh material that characterises the middle canyon, the lower canyon receives pulses of sediment via gravity flows on longer time scales. At decadal scale, the CFC can be considered as a relatively quiescent canyon. The disconnection of the CFC from major sources of sediment delivery seems to limit its efficiency in particle transfer from coastal areas to the adjacent ocean basin.
publishDate 2014
dc.date.none.fl_str_mv 2014-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/6855
Schmidt, Sabine; Howa, Héléne; Diallo, Amy; Martín de Nascimento, Jacobo; Cremer, Michel; et al.; Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay; Elsevier; Deep Sea Research Part II: Topical Studies in Oceanography; 104; 3-2014; 134-144
0967-0645
url http://hdl.handle.net/11336/6855
identifier_str_mv Schmidt, Sabine; Howa, Héléne; Diallo, Amy; Martín de Nascimento, Jacobo; Cremer, Michel; et al.; Recent sediment transport and deposition in the Cap-Ferret Canyon, South-East margin of Bay of Biscay; Elsevier; Deep Sea Research Part II: Topical Studies in Oceanography; 104; 3-2014; 134-144
0967-0645
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0967064513002348
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2013.06.004
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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