A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin)
28 pages, 10 figures, 1 table, supporting information https://doi.org/10.1111/sed.12844.-- Data availability The data that support the findings of this study are available from the corresponding author upon reasonable request. Synchronous interaction between bottom currents and turbidity currents ha...
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International Association of Sedimentologists
2021
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Online Access: | http://hdl.handle.net/10261/248310 https://doi.org/10.1111/sed.12844 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100003329 |
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ftcsic:oai:digital.csic.es:10261/248310 2024-02-11T10:06:49+01:00 A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) Mencaroni, Davide Urgeles, Roger Camerlenghi, Angelo Llopart, Jaume Ford, Jonathan Sànchez-Serra, Cristina Meservy, William Gràcia, Eulàlia Rebesco, Michele Zitellini, Nevio European Commission Ministerio de Economía y Competitividad (España) Agencia Estatal de Investigación (España) 2021-08 http://hdl.handle.net/10261/248310 https://doi.org/10.1111/sed.12844 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100003329 en eng International Association of Sedimentologists #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/721403 info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-70155-R Publisher's version https://doi.org/10.1111/sed.12844 Sí Sedimentology 68(5): 2069-2096 (2021) 0037-0746 CEX2019-000928-S http://hdl.handle.net/10261/248310 doi:10.1111/sed.12844 1365-3091 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100003329 open Alentejo Basin Drift Mediterranean Outflow Water Mixed turbidite-contourite Nepheloid layers Quaternary Submarine canyon Submarine slope stability SW Iberia artículo http://purl.org/coar/resource_type/c_6501 2021 ftcsic https://doi.org/10.1111/sed.1284410.13039/50110000078010.13039/50110001103310.13039/501100003329 2024-01-16T11:12:27Z 28 pages, 10 figures, 1 table, supporting information https://doi.org/10.1111/sed.12844.-- Data availability The data that support the findings of this study are available from the corresponding author upon reasonable request. Synchronous interaction between bottom currents and turbidity currents has been reported often in channel–levée systems where the thickness of the turbidity currents exceeds that of the levées. Such interplay between along-slope and down-slope sedimentary processes is one of the mechanisms by which ‘mixed turbidite–contourite systems’ can originate. However, bottom currents flow over large areas of the seafloor, including continental slopes characterized by deeply incised submarine canyons rather than channel levées. In these cases, a direct interaction between along-slope and down-slope currents is, theoretically, unlikely to take place. In this study, oceanographic, swath bathymetry, multichannel seismic data and sediment cores are used to investigate a 25 km long, 10 km wide and up to 0.5 km thick deep-sea late Quaternary deposit that sits adjacent to the north-west flank of one of the major canyons in the North Atlantic, the São Vicente Canyon, in the Alentejo Basin (south-west Iberian margin). The area receives the influence of a strong bottom current, the Mediterranean Outflow Water, which has swept the continental slope at different water depth ranges during glacial and interglacial periods. Architectural patterns and sediment characteristics suggest that this sedimentary body, named Marquês de Pombal Drift, is the result of the interaction between the Mediterranean Outflow Water (particularly during cold periods) and turbidity currents flowing along the São Vicente Canyon. Because the canyon is incised significantly deeper (ca 1.5 km) than the thickness of turbidity currents, an additional process, in comparison to earlier models, is needed to allow the interaction with the Mediterranean Outflow Water and transport sediment out of the canyon. In the São Vicente Canyon, and likely ... Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Sedimentology 68 5 2069 2096 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Alentejo Basin Drift Mediterranean Outflow Water Mixed turbidite-contourite Nepheloid layers Quaternary Submarine canyon Submarine slope stability SW Iberia |
spellingShingle |
Alentejo Basin Drift Mediterranean Outflow Water Mixed turbidite-contourite Nepheloid layers Quaternary Submarine canyon Submarine slope stability SW Iberia Mencaroni, Davide Urgeles, Roger Camerlenghi, Angelo Llopart, Jaume Ford, Jonathan Sànchez-Serra, Cristina Meservy, William Gràcia, Eulàlia Rebesco, Michele Zitellini, Nevio A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
topic_facet |
Alentejo Basin Drift Mediterranean Outflow Water Mixed turbidite-contourite Nepheloid layers Quaternary Submarine canyon Submarine slope stability SW Iberia |
description |
28 pages, 10 figures, 1 table, supporting information https://doi.org/10.1111/sed.12844.-- Data availability The data that support the findings of this study are available from the corresponding author upon reasonable request. Synchronous interaction between bottom currents and turbidity currents has been reported often in channel–levée systems where the thickness of the turbidity currents exceeds that of the levées. Such interplay between along-slope and down-slope sedimentary processes is one of the mechanisms by which ‘mixed turbidite–contourite systems’ can originate. However, bottom currents flow over large areas of the seafloor, including continental slopes characterized by deeply incised submarine canyons rather than channel levées. In these cases, a direct interaction between along-slope and down-slope currents is, theoretically, unlikely to take place. In this study, oceanographic, swath bathymetry, multichannel seismic data and sediment cores are used to investigate a 25 km long, 10 km wide and up to 0.5 km thick deep-sea late Quaternary deposit that sits adjacent to the north-west flank of one of the major canyons in the North Atlantic, the São Vicente Canyon, in the Alentejo Basin (south-west Iberian margin). The area receives the influence of a strong bottom current, the Mediterranean Outflow Water, which has swept the continental slope at different water depth ranges during glacial and interglacial periods. Architectural patterns and sediment characteristics suggest that this sedimentary body, named Marquês de Pombal Drift, is the result of the interaction between the Mediterranean Outflow Water (particularly during cold periods) and turbidity currents flowing along the São Vicente Canyon. Because the canyon is incised significantly deeper (ca 1.5 km) than the thickness of turbidity currents, an additional process, in comparison to earlier models, is needed to allow the interaction with the Mediterranean Outflow Water and transport sediment out of the canyon. In the São Vicente Canyon, and likely ... |
author2 |
European Commission Ministerio de Economía y Competitividad (España) Agencia Estatal de Investigación (España) |
format |
Article in Journal/Newspaper |
author |
Mencaroni, Davide Urgeles, Roger Camerlenghi, Angelo Llopart, Jaume Ford, Jonathan Sànchez-Serra, Cristina Meservy, William Gràcia, Eulàlia Rebesco, Michele Zitellini, Nevio |
author_facet |
Mencaroni, Davide Urgeles, Roger Camerlenghi, Angelo Llopart, Jaume Ford, Jonathan Sànchez-Serra, Cristina Meservy, William Gràcia, Eulàlia Rebesco, Michele Zitellini, Nevio |
author_sort |
Mencaroni, Davide |
title |
A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
title_short |
A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
title_full |
A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
title_fullStr |
A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
title_full_unstemmed |
A mixed turbidite - contourite system related to a major submarine canyon: The Marquês de Pombal Drift (south-west Iberian margin) |
title_sort |
mixed turbidite - contourite system related to a major submarine canyon: the marquês de pombal drift (south-west iberian margin) |
publisher |
International Association of Sedimentologists |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/248310 https://doi.org/10.1111/sed.12844 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100003329 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/721403 info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-70155-R Publisher's version https://doi.org/10.1111/sed.12844 Sí Sedimentology 68(5): 2069-2096 (2021) 0037-0746 CEX2019-000928-S http://hdl.handle.net/10261/248310 doi:10.1111/sed.12844 1365-3091 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100003329 |
op_rights |
open |
op_doi |
https://doi.org/10.1111/sed.1284410.13039/50110000078010.13039/50110001103310.13039/501100003329 |
container_title |
Sedimentology |
container_volume |
68 |
container_issue |
5 |
container_start_page |
2069 |
op_container_end_page |
2096 |
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1790604788127236096 |