Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope

Comunicación ora presentada en 38th International Meeting of Sedimentology in Huelva, Spain, June 26-28, 2025

Detalles Bibliográficos
Autores: Schattner, Uri, Barbedo Rocha, César, Basti Ramos, Raissa, Lobo, Francisco José, Michaelovitch de Mahiques, Michel
Tipo de recurso: otro
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/405298
Acceso en línea:http://hdl.handle.net/10261/405298
Access Level:acceso abierto
Palabra clave:Continental slope geomorphology
Ocean bottom currents, Brazil
Atlantic ocean
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spelling Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slopeSchattner, UriBarbedo Rocha, CésarBasti Ramos, RaissaLobo, Francisco JoséMichaelovitch de Mahiques, MichelContinental slope geomorphologyOcean bottom currents, BrazilAtlantic oceanComunicación ora presentada en 38th International Meeting of Sedimentology in Huelva, Spain, June 26-28, 2025New bathymetric and subsurface data from the Santos Basin, offshore southeast Brazil, reveal sharp lateral morphological variations facing the margin-parallel (alongmargin) flow of the Antarctic Intermediate Water. The data, derived from 3D Pre-Stack Depth Migrated (PSDM) seismic reflection volumes, show slope gullies, mass transport deposits, and scars over a ~100 km long Southern segment. These morphologies sharply shift laterally to a ~50 km long Northern segment, typified by a smooth relief built of plastered contourite drifts with scarce elongated depressions. We examine this sharp lateral shift in the morphology of bottom current indicators in view of the hydrodynamical regime, sediment sources, and their distribution pattern. Results indicate that the sharp lateral morphological shift is attributed to (1) a 30° change in slope orientation, and (2) a northward increase in the across-margin velocity component of the Intermediate Water Boundary Current (IWBC). Subsurface data suggest that this flow pattern has persisted since the mid-Miocene. In this case study, the lateral morphological shifts under contemporary hydrodynamic conditions emphasize the importance of understanding the coupling between ocean bottom currents and the seafloor in any marine environmentInternational Association of SedimentologistsConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520252025info:eu-repo/semantics/otherhttp://purl.org/coar/resource_type/c_3248Publisher's versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookParthttp://hdl.handle.net/10261/405298reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4052982026-05-22T06:33:51Z
dc.title.none.fl_str_mv Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
title Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
spellingShingle Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
Schattner, Uri
Continental slope geomorphology
Ocean bottom currents, Brazil
Atlantic ocean
title_short Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
title_full Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
title_fullStr Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
title_full_unstemmed Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
title_sort Lateral shift from turbidite- to contourite-dominated continental slope, a case study from southeast Brazil slope
dc.creator.none.fl_str_mv Schattner, Uri
Barbedo Rocha, César
Basti Ramos, Raissa
Lobo, Francisco José
Michaelovitch de Mahiques, Michel
author Schattner, Uri
author_facet Schattner, Uri
Barbedo Rocha, César
Basti Ramos, Raissa
Lobo, Francisco José
Michaelovitch de Mahiques, Michel
author_role author
author2 Barbedo Rocha, César
Basti Ramos, Raissa
Lobo, Francisco José
Michaelovitch de Mahiques, Michel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Continental slope geomorphology
Ocean bottom currents, Brazil
Atlantic ocean
topic Continental slope geomorphology
Ocean bottom currents, Brazil
Atlantic ocean
description Comunicación ora presentada en 38th International Meeting of Sedimentology in Huelva, Spain, June 26-28, 2025
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/other
http://purl.org/coar/resource_type/c_3248
Publisher's version
info:eu-repo/semantics/publishedVersion
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format other
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/405298
url http://hdl.handle.net/10261/405298
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv International Association of Sedimentologists
publisher.none.fl_str_mv International Association of Sedimentologists
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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