Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana)
International audience The Demerara Plateau is a marginal plateau which forms a bathymetric relief on the sea floor. Here, contourite deposits have been studied in detail, following the recent discovery of contourite sequences likely related to the bottom currents and linked both to contour current...
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ftccsdartic:oai:HAL:hal-02087669v1 2023-05-15T17:13:50+02:00 Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) Tallobre, Cédric Giresse, Pierre Bassetti, Maria-Angela Loncke, Lies Bayon, Germain Buscail, Roselyne Tudryn, Alina Zaragosi, Sébastien Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Unité de recherche Géosciences Marines (Ifremer) (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Centre de formation et de recherche sur l'environnement marin (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2019-06 https://hal.archives-ouvertes.fr/hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669/document https://hal.archives-ouvertes.fr/hal-02087669/file/S0895981118302827.pdf https://doi.org/10.1016/j.jsames.2019.03.011 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2019.03.011 hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669/document https://hal.archives-ouvertes.fr/hal-02087669/file/S0895981118302827.pdf doi:10.1016/j.jsames.2019.03.011 PII: S0895-9811(18)30282-7 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 0895-9811 Journal of South American Earth Sciences https://hal.archives-ouvertes.fr/hal-02087669 Journal of South American Earth Sciences, Elsevier, 2019, 92, pp.167-183. ⟨10.1016/j.jsames.2019.03.011⟩ [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1016/j.jsames.2019.03.011 2021-11-20T23:37:09Z International audience The Demerara Plateau is a marginal plateau which forms a bathymetric relief on the sea floor. Here, contourite deposits have been studied in detail, following the recent discovery of contourite sequences likely related to the bottom currents and linked both to contour current and peculiar sea-floor morphology. A chronostratigraphic framework, based on δ18O relative variations and palaeomagnetic events in sediment cores allows correlating sediment processes to current intensity changes and major climate phases (glacial or interglacial). The studied sediments are enriched in glauconitic grains. In addition, the glauconite mineralogical maturity can easily correlate to low sedimentation rate and slightly energetic bottom currents on the seafloor. Based on these data and using the glauconitic authigenic mineral as proxy for inferring the degree of winnowing at the sediment-water interface, we might put forward the hypothesis that the intensity of NADW is higher during the glacial stages and lower during interglacial periods. Article in Journal/Newspaper NADW Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of South American Earth Sciences 92 167 183 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Tallobre, Cédric Giresse, Pierre Bassetti, Maria-Angela Loncke, Lies Bayon, Germain Buscail, Roselyne Tudryn, Alina Zaragosi, Sébastien Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Demerara Plateau is a marginal plateau which forms a bathymetric relief on the sea floor. Here, contourite deposits have been studied in detail, following the recent discovery of contourite sequences likely related to the bottom currents and linked both to contour current and peculiar sea-floor morphology. A chronostratigraphic framework, based on δ18O relative variations and palaeomagnetic events in sediment cores allows correlating sediment processes to current intensity changes and major climate phases (glacial or interglacial). The studied sediments are enriched in glauconitic grains. In addition, the glauconite mineralogical maturity can easily correlate to low sedimentation rate and slightly energetic bottom currents on the seafloor. Based on these data and using the glauconitic authigenic mineral as proxy for inferring the degree of winnowing at the sediment-water interface, we might put forward the hypothesis that the intensity of NADW is higher during the glacial stages and lower during interglacial periods. |
author2 |
Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS) Unité de recherche Géosciences Marines (Ifremer) (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Centre de formation et de recherche sur l'environnement marin (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Tallobre, Cédric Giresse, Pierre Bassetti, Maria-Angela Loncke, Lies Bayon, Germain Buscail, Roselyne Tudryn, Alina Zaragosi, Sébastien |
author_facet |
Tallobre, Cédric Giresse, Pierre Bassetti, Maria-Angela Loncke, Lies Bayon, Germain Buscail, Roselyne Tudryn, Alina Zaragosi, Sébastien |
author_sort |
Tallobre, Cédric |
title |
Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
title_short |
Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
title_full |
Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
title_fullStr |
Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
title_full_unstemmed |
Formation and evolution of glauconite in the Demerara Contourite depositional system related to NADW circulation changes during late Quaternary (French Guiana) |
title_sort |
formation and evolution of glauconite in the demerara contourite depositional system related to nadw circulation changes during late quaternary (french guiana) |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669/document https://hal.archives-ouvertes.fr/hal-02087669/file/S0895981118302827.pdf https://doi.org/10.1016/j.jsames.2019.03.011 |
genre |
NADW |
genre_facet |
NADW |
op_source |
ISSN: 0895-9811 Journal of South American Earth Sciences https://hal.archives-ouvertes.fr/hal-02087669 Journal of South American Earth Sciences, Elsevier, 2019, 92, pp.167-183. ⟨10.1016/j.jsames.2019.03.011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2019.03.011 hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669 https://hal.archives-ouvertes.fr/hal-02087669/document https://hal.archives-ouvertes.fr/hal-02087669/file/S0895981118302827.pdf doi:10.1016/j.jsames.2019.03.011 PII: S0895-9811(18)30282-7 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1016/j.jsames.2019.03.011 |
container_title |
Journal of South American Earth Sciences |
container_volume |
92 |
container_start_page |
167 |
op_container_end_page |
183 |
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1766071033412976640 |