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://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://archimer.ifremer.fr/doc/00235/34585/ |
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fttriple:oai:gotriple.eu:10670/1.h9lw83 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 2006-01-01 https://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://archimer.ifremer.fr/doc/00235/34585/ en eng Amer Geophysical Union doi:10.1029/2005GC001070 10670/1.h9lw83 https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://archimer.ifremer.fr/doc/00235/34585/ other Archimer, archive institutionnelle de l'Ifremer Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2006-02 , Vol. 7 , N. 2 / Q02N01 , P. 1-16 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2006 fttriple https://doi.org/10.1029/2005GC001070 2023-01-22T18:14:35Z [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. Text NADW North Atlantic Deep Water North Atlantic Unknown 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 |
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English |
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geo envir 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 |
geo envir |
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 |
Text |
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://doi.org/10.1029/2005GC001070 https://archimer.ifremer.fr/doc/00235/34585/33077.pdf 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 |
Archimer, archive institutionnelle de l'Ifremer Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2006-02 , Vol. 7 , N. 2 / Q02N01 , P. 1-16 |
op_relation |
doi:10.1029/2005GC001070 10670/1.h9lw83 https://archimer.ifremer.fr/doc/00235/34585/33077.pdf https://archimer.ifremer.fr/doc/00235/34585/ |
op_rights |
other |
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 |
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n/a |
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1766071038928486400 |