Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments
[1] In order to investigate North Atlantic Deep Water (NADW) dynamics and variability during the last glacial stage, a very high resolution multiproxy analysis of the detrital fraction of sediments deposited during Heinrich event 4 and Dansgaard-Oeschger cycles 8 and 7 has been conducted on three de...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/ |
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ftarchimer:oai:archimer.ifremer.fr:34585 2023-05-15T17:13:51+02:00 Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments Ballini, M Kissel, C Colin, C Richter, T 2006-02 application/pdf https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00235/34585/33077.pdf doi:10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/ 2006 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2006-02 , Vol. 7 , N. 2 / Q02N01 , P. 1-16 glacial period Dansgaard-Oeschger cycles North Atlantic bottom water circulation magnetic properties clay minerals text Publication info:eu-repo/semantics/article 2006 ftarchimer https://doi.org/10.1029/2005GC001070 2021-09-23T20:25:21Z [1] In order to investigate North Atlantic Deep Water (NADW) dynamics and variability during the last glacial stage, a very high resolution multiproxy analysis of the detrital fraction of sediments deposited during Heinrich event 4 and Dansgaard-Oeschger cycles 8 and 7 has been conducted on three deep-sea cores. These cores are distributed along the path of the North Atlantic Deep Water from the Faeroe Shetland Channel to the Reykjanes ridge and the Irminger basin. The concentration in fine-grained magnetites, the Ti-content, and the smectite percentage within the clay minerals show similar and coeval fluctuations at each site and are comparable from one site to the other. This is the imprint of the detrital fraction originating from the northern basaltic provinces and transported to the studied sites. The average grain size in the fine fraction indicates a transport by deep-sea currents. Therefore the observed fluctuations illustrate changes in the vigor of the bottom currents associated with the NADW with weak currents during cold periods ( Heinrich 4 and stadials) and reactivation of the bottom circulation during interstadials. Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geochemistry, Geophysics, Geosystems 7 2 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
glacial period Dansgaard-Oeschger cycles North Atlantic bottom water circulation magnetic properties clay minerals |
spellingShingle |
glacial period Dansgaard-Oeschger cycles North Atlantic bottom water circulation magnetic properties clay minerals Ballini, M Kissel, C Colin, C Richter, T Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
topic_facet |
glacial period Dansgaard-Oeschger cycles North Atlantic bottom water circulation magnetic properties clay minerals |
description |
[1] In order to investigate North Atlantic Deep Water (NADW) dynamics and variability during the last glacial stage, a very high resolution multiproxy analysis of the detrital fraction of sediments deposited during Heinrich event 4 and Dansgaard-Oeschger cycles 8 and 7 has been conducted on three deep-sea cores. These cores are distributed along the path of the North Atlantic Deep Water from the Faeroe Shetland Channel to the Reykjanes ridge and the Irminger basin. The concentration in fine-grained magnetites, the Ti-content, and the smectite percentage within the clay minerals show similar and coeval fluctuations at each site and are comparable from one site to the other. This is the imprint of the detrital fraction originating from the northern basaltic provinces and transported to the studied sites. The average grain size in the fine fraction indicates a transport by deep-sea currents. Therefore the observed fluctuations illustrate changes in the vigor of the bottom currents associated with the NADW with weak currents during cold periods ( Heinrich 4 and stadials) and reactivation of the bottom circulation during interstadials. |
format |
Article in Journal/Newspaper |
author |
Ballini, M Kissel, C Colin, C Richter, T |
author_facet |
Ballini, M Kissel, C Colin, C Richter, T |
author_sort |
Ballini, M |
title |
Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
title_short |
Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
title_full |
Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
title_fullStr |
Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
title_full_unstemmed |
Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments |
title_sort |
deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the north atlantic: a multiproxy investigation of the detrital fraction of deep-sea sediments |
publisher |
Amer Geophysical Union |
publishDate |
2006 |
url |
https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/ |
long_lat |
ENVELOPE(-36.000,-36.000,61.000,61.000) ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Irminger Basin Reykjanes |
geographic_facet |
Irminger Basin Reykjanes |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_source |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2006-02 , Vol. 7 , N. 2 / Q02N01 , P. 1-16 |
op_relation |
https://archimer.ifremer.fr/doc/00235/34585/33077.pdf doi:10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/ |
op_rights |
2006 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2005GC001070 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
7 |
container_issue |
2 |
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n/a |
op_container_end_page |
n/a |
_version_ |
1766071041776418816 |