A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications

Autores
Hernandez Molina, F.Javier; Soto, Matias; Piola, Alberto Ricardo; Tomasini, Juan; Preu, Benedict; Thompson, Phil; Baldini, Gianluca; Creaser, Adam; Violante, Roberto Antonio; Morales, Ethel; Paterlini, Marcelo; De Santa Ana, Hector
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
For the first time, a multidisciplinary approach to evaluate the influence of bottom currents in the Uruguayan continental margin is presented. Bathymetric data and multichannel 2D and 3D seismic reflection profiles were used to construct a morphosedimentary map to interpret and decode sedimentary and oceanographic processes along the Uruguayan continental margin. Based on these results, an extensive contourite depositional system on the margin is described, which contains an impressive array of large erosive, depositional (drifts) and mixed (terrace) features, which have been generated primarily by the near-bottom flows associated with water masses of Antarctic and subantarctic origin. From the Eocene–Oligocene boundary up to present time, the long-term influence of water masses from higher southern latitudes, in combination with down-slope sedimentary processes have strongly controlled the overall margin morphology. Most of the features described here, were formed during the middle/late Miocene epoch due to paleoceanographic shifts that include the arrival of Antarctic Intermediate Water along the margin, which in combination with deeper Antarctic Bottom Water are fundamental in the margin evolution. In combination with Quaternary climatic and eustatic changes in sea level, fluctuations of the Brazil–Malvinas Confluence influenced subsequently glacial and interglacial stages as recognized in sedimentary features defined here. These paleoceanographic changes controlled the sedimentary stacking pattern and the locations of high amplitude reflections along the contourite terraces, which could be associated with sandy deposits. A more detailed understanding of the margin will improve interpretations of variations in the South Atlantic subtropical gyre and further constrain general climatic and ocean circulation models.
Fil: Hernandez Molina, F.Javier. University of London; Reino Unido
Fil: Soto, Matias. ANCAP; Uruguay
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires; Argentina. Instituto Franco-Argentino; Argentina
Fil: Tomasini, Juan. ANCAP; Uruguay
Fil: Preu, Benedict. Chevron Upstream Europe; Reino Unido
Fil: Thompson, Phil. BG Group; Reino Unido
Fil: Baldini, Gianluca. BG Group; Reino Unido
Fil: Creaser, Adam. University of London; Reino Unido
Fil: Violante, Roberto Antonio. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: Morales, Ethel. ANCAP; Uruguay
Fil: Paterlini, Marcelo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: De Santa Ana, Hector. ANCAP; Uruguay
Materia
Sedimentary Processes
Seismic Stratigraphy
High Amplitude Reflections
Paleoceanography
Contourites
Uruguayan Margin
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/43741
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/43741
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implicationsHernandez Molina, F.JavierSoto, MatiasPiola, Alberto RicardoTomasini, JuanPreu, BenedictThompson, PhilBaldini, GianlucaCreaser, AdamViolante, Roberto AntonioMorales, EthelPaterlini, MarceloDe Santa Ana, HectorSedimentary ProcessesSeismic StratigraphyHigh Amplitude ReflectionsPaleoceanographyContouritesUruguayan Marginhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1For the first time, a multidisciplinary approach to evaluate the influence of bottom currents in the Uruguayan continental margin is presented. Bathymetric data and multichannel 2D and 3D seismic reflection profiles were used to construct a morphosedimentary map to interpret and decode sedimentary and oceanographic processes along the Uruguayan continental margin. Based on these results, an extensive contourite depositional system on the margin is described, which contains an impressive array of large erosive, depositional (drifts) and mixed (terrace) features, which have been generated primarily by the near-bottom flows associated with water masses of Antarctic and subantarctic origin. From the Eocene–Oligocene boundary up to present time, the long-term influence of water masses from higher southern latitudes, in combination with down-slope sedimentary processes have strongly controlled the overall margin morphology. Most of the features described here, were formed during the middle/late Miocene epoch due to paleoceanographic shifts that include the arrival of Antarctic Intermediate Water along the margin, which in combination with deeper Antarctic Bottom Water are fundamental in the margin evolution. In combination with Quaternary climatic and eustatic changes in sea level, fluctuations of the Brazil–Malvinas Confluence influenced subsequently glacial and interglacial stages as recognized in sedimentary features defined here. These paleoceanographic changes controlled the sedimentary stacking pattern and the locations of high amplitude reflections along the contourite terraces, which could be associated with sandy deposits. A more detailed understanding of the margin will improve interpretations of variations in the South Atlantic subtropical gyre and further constrain general climatic and ocean circulation models.Fil: Hernandez Molina, F.Javier. University of London; Reino UnidoFil: Soto, Matias. ANCAP; UruguayFil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires; Argentina. Instituto Franco-Argentino; ArgentinaFil: Tomasini, Juan. ANCAP; UruguayFil: Preu, Benedict. Chevron Upstream Europe; Reino UnidoFil: Thompson, Phil. BG Group; Reino UnidoFil: Baldini, Gianluca. BG Group; Reino UnidoFil: Creaser, Adam. University of London; Reino UnidoFil: Violante, Roberto Antonio. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; ArgentinaFil: Morales, Ethel. ANCAP; UruguayFil: Paterlini, Marcelo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; ArgentinaFil: De Santa Ana, Hector. ANCAP; UruguayElsevier Science2016-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/43741Hernandez Molina, F.Javier; Soto, Matias; Piola, Alberto Ricardo; Tomasini, Juan; Preu, Benedict; et al.; A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications; Elsevier Science; Marine Geology; 378; 8-2016; 333-3490025-3227CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2015.10.008info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0025322715300487info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:31:19Zoai:ri.conicet.gov.ar:11336/43741instacron: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:34982025-10-15 14:31:19.933CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
title A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
spellingShingle A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
Hernandez Molina, F.Javier
Sedimentary Processes
Seismic Stratigraphy
High Amplitude Reflections
Paleoceanography
Contourites
Uruguayan Margin
title_short A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
title_full A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
title_fullStr A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
title_full_unstemmed A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
title_sort A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications
dc.creator.none.fl_str_mv Hernandez Molina, F.Javier
Soto, Matias
Piola, Alberto Ricardo
Tomasini, Juan
Preu, Benedict
Thompson, Phil
Baldini, Gianluca
Creaser, Adam
Violante, Roberto Antonio
Morales, Ethel
Paterlini, Marcelo
De Santa Ana, Hector
author Hernandez Molina, F.Javier
author_facet Hernandez Molina, F.Javier
Soto, Matias
Piola, Alberto Ricardo
Tomasini, Juan
Preu, Benedict
Thompson, Phil
Baldini, Gianluca
Creaser, Adam
Violante, Roberto Antonio
Morales, Ethel
Paterlini, Marcelo
De Santa Ana, Hector
author_role author
author2 Soto, Matias
Piola, Alberto Ricardo
Tomasini, Juan
Preu, Benedict
Thompson, Phil
Baldini, Gianluca
Creaser, Adam
Violante, Roberto Antonio
Morales, Ethel
Paterlini, Marcelo
De Santa Ana, Hector
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sedimentary Processes
Seismic Stratigraphy
High Amplitude Reflections
Paleoceanography
Contourites
Uruguayan Margin
topic Sedimentary Processes
Seismic Stratigraphy
High Amplitude Reflections
Paleoceanography
Contourites
Uruguayan Margin
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv For the first time, a multidisciplinary approach to evaluate the influence of bottom currents in the Uruguayan continental margin is presented. Bathymetric data and multichannel 2D and 3D seismic reflection profiles were used to construct a morphosedimentary map to interpret and decode sedimentary and oceanographic processes along the Uruguayan continental margin. Based on these results, an extensive contourite depositional system on the margin is described, which contains an impressive array of large erosive, depositional (drifts) and mixed (terrace) features, which have been generated primarily by the near-bottom flows associated with water masses of Antarctic and subantarctic origin. From the Eocene–Oligocene boundary up to present time, the long-term influence of water masses from higher southern latitudes, in combination with down-slope sedimentary processes have strongly controlled the overall margin morphology. Most of the features described here, were formed during the middle/late Miocene epoch due to paleoceanographic shifts that include the arrival of Antarctic Intermediate Water along the margin, which in combination with deeper Antarctic Bottom Water are fundamental in the margin evolution. In combination with Quaternary climatic and eustatic changes in sea level, fluctuations of the Brazil–Malvinas Confluence influenced subsequently glacial and interglacial stages as recognized in sedimentary features defined here. These paleoceanographic changes controlled the sedimentary stacking pattern and the locations of high amplitude reflections along the contourite terraces, which could be associated with sandy deposits. A more detailed understanding of the margin will improve interpretations of variations in the South Atlantic subtropical gyre and further constrain general climatic and ocean circulation models.
Fil: Hernandez Molina, F.Javier. University of London; Reino Unido
Fil: Soto, Matias. ANCAP; Uruguay
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires; Argentina. Instituto Franco-Argentino; Argentina
Fil: Tomasini, Juan. ANCAP; Uruguay
Fil: Preu, Benedict. Chevron Upstream Europe; Reino Unido
Fil: Thompson, Phil. BG Group; Reino Unido
Fil: Baldini, Gianluca. BG Group; Reino Unido
Fil: Creaser, Adam. University of London; Reino Unido
Fil: Violante, Roberto Antonio. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: Morales, Ethel. ANCAP; Uruguay
Fil: Paterlini, Marcelo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: De Santa Ana, Hector. ANCAP; Uruguay
description For the first time, a multidisciplinary approach to evaluate the influence of bottom currents in the Uruguayan continental margin is presented. Bathymetric data and multichannel 2D and 3D seismic reflection profiles were used to construct a morphosedimentary map to interpret and decode sedimentary and oceanographic processes along the Uruguayan continental margin. Based on these results, an extensive contourite depositional system on the margin is described, which contains an impressive array of large erosive, depositional (drifts) and mixed (terrace) features, which have been generated primarily by the near-bottom flows associated with water masses of Antarctic and subantarctic origin. From the Eocene–Oligocene boundary up to present time, the long-term influence of water masses from higher southern latitudes, in combination with down-slope sedimentary processes have strongly controlled the overall margin morphology. Most of the features described here, were formed during the middle/late Miocene epoch due to paleoceanographic shifts that include the arrival of Antarctic Intermediate Water along the margin, which in combination with deeper Antarctic Bottom Water are fundamental in the margin evolution. In combination with Quaternary climatic and eustatic changes in sea level, fluctuations of the Brazil–Malvinas Confluence influenced subsequently glacial and interglacial stages as recognized in sedimentary features defined here. These paleoceanographic changes controlled the sedimentary stacking pattern and the locations of high amplitude reflections along the contourite terraces, which could be associated with sandy deposits. A more detailed understanding of the margin will improve interpretations of variations in the South Atlantic subtropical gyre and further constrain general climatic and ocean circulation models.
publishDate 2016
dc.date.none.fl_str_mv 2016-08
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/11336/43741
Hernandez Molina, F.Javier; Soto, Matias; Piola, Alberto Ricardo; Tomasini, Juan; Preu, Benedict; et al.; A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications; Elsevier Science; Marine Geology; 378; 8-2016; 333-349
0025-3227
CONICET Digital
CONICET
url http://hdl.handle.net/11336/43741
identifier_str_mv Hernandez Molina, F.Javier; Soto, Matias; Piola, Alberto Ricardo; Tomasini, Juan; Preu, Benedict; et al.; A contourite depositional system along the Uruguayan continental margin: sedimentary, oceanographic and paleoceanographic implications; Elsevier Science; Marine Geology; 378; 8-2016; 333-349
0025-3227
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2015.10.008
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0025322715300487
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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 13.22299

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