Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes
The Belgica cold-water coral banks on the eastern slope of the Porcupine Seabight are closely associated with bottom currents. In order to better understand the local temporal and spatial characteristics, as well as the palaeoclimatologic influences, a 26 m long core, taken on a small contourite dri...
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fttriple:oai:gotriple.eu:10670/1.01acw5 2023-05-15T16:41:04+02:00 Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes Van Rooij, D. Blamart, D. Richter, T. Wheeler, A. Kozachenko, M. Henriet, J.-p. 2007-01-01 https://doi.org/10.1007/s00531-006-0086-6 https://archimer.ifremer.fr/doc/00233/34438/32929.pdf https://archimer.ifremer.fr/doc/00233/34438/ en eng Springer doi:10.1007/s00531-006-0086-6 10670/1.01acw5 https://archimer.ifremer.fr/doc/00233/34438/32929.pdf https://archimer.ifremer.fr/doc/00233/34438/ other Archimer, archive institutionnelle de l'Ifremer International Journal Of Earth Sciences (1437-3254) (Springer), 2007-02 , Vol. 96 , N. 1 , P. 121-140 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2007 fttriple https://doi.org/10.1007/s00531-006-0086-6 2023-01-22T16:44:28Z The Belgica cold-water coral banks on the eastern slope of the Porcupine Seabight are closely associated with bottom currents. In order to better understand the local temporal and spatial characteristics, as well as the palaeoclimatologic influences, a 26 m long core, taken on a small contourite drift, was studied. This sediment record of approximately 100 ka BP reveals new insights into the regional glacial and sedimentary processes, which are intrinsically linked to several geological, climatological, biological and hydrodynamic variables. The glacial sequences in the core contain six ice-rafting events (IRE). They are comparable with the North Atlantic Heinrich Events, although their characteristics show dominant influences from the proximal British-Irish Ice Sheet (BIIS). These IRE have a low magnetic susceptibility and are deposited during two or three ice-rafting pulses. The record of ice-rafting suggests a millennial-scaled BIIS destabilisation and confirms the start of a final retreat about 25 ka ago. Additionally, the glacial sequence corresponds to a muddy contourite, influenced by bottom-current strength variations during interstadials, possibly triggered by sporadic reintroductions of Mediterranean Outflow Water in a glacial North Atlantic Ocean. The interglacial sequence features an 11-m thick deep-water massive sand unit, probably deposited under a high-energy bottom-current regime. Text Ice Sheet North Atlantic Unknown Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) International Journal of Earth Sciences 96 1 121 140 |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Van Rooij, D. Blamart, D. Richter, T. Wheeler, A. Kozachenko, M. Henriet, J.-p. Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
topic_facet |
geo envir |
description |
The Belgica cold-water coral banks on the eastern slope of the Porcupine Seabight are closely associated with bottom currents. In order to better understand the local temporal and spatial characteristics, as well as the palaeoclimatologic influences, a 26 m long core, taken on a small contourite drift, was studied. This sediment record of approximately 100 ka BP reveals new insights into the regional glacial and sedimentary processes, which are intrinsically linked to several geological, climatological, biological and hydrodynamic variables. The glacial sequences in the core contain six ice-rafting events (IRE). They are comparable with the North Atlantic Heinrich Events, although their characteristics show dominant influences from the proximal British-Irish Ice Sheet (BIIS). These IRE have a low magnetic susceptibility and are deposited during two or three ice-rafting pulses. The record of ice-rafting suggests a millennial-scaled BIIS destabilisation and confirms the start of a final retreat about 25 ka ago. Additionally, the glacial sequence corresponds to a muddy contourite, influenced by bottom-current strength variations during interstadials, possibly triggered by sporadic reintroductions of Mediterranean Outflow Water in a glacial North Atlantic Ocean. The interglacial sequence features an 11-m thick deep-water massive sand unit, probably deposited under a high-energy bottom-current regime. |
format |
Text |
author |
Van Rooij, D. Blamart, D. Richter, T. Wheeler, A. Kozachenko, M. Henriet, J.-p. |
author_facet |
Van Rooij, D. Blamart, D. Richter, T. Wheeler, A. Kozachenko, M. Henriet, J.-p. |
author_sort |
Van Rooij, D. |
title |
Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
title_short |
Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
title_full |
Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
title_fullStr |
Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
title_full_unstemmed |
Quaternary sediment dynamics in the Belgica mound province, Porcupine Seabight: ice-rafting events and contour current processes |
title_sort |
quaternary sediment dynamics in the belgica mound province, porcupine seabight: ice-rafting events and contour current processes |
publisher |
Springer |
publishDate |
2007 |
url |
https://doi.org/10.1007/s00531-006-0086-6 https://archimer.ifremer.fr/doc/00233/34438/32929.pdf https://archimer.ifremer.fr/doc/00233/34438/ |
long_lat |
ENVELOPE(-13.000,-13.000,50.500,50.500) |
geographic |
Porcupine Seabight |
geographic_facet |
Porcupine Seabight |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
Archimer, archive institutionnelle de l'Ifremer International Journal Of Earth Sciences (1437-3254) (Springer), 2007-02 , Vol. 96 , N. 1 , P. 121-140 |
op_relation |
doi:10.1007/s00531-006-0086-6 10670/1.01acw5 https://archimer.ifremer.fr/doc/00233/34438/32929.pdf https://archimer.ifremer.fr/doc/00233/34438/ |
op_rights |
other |
op_doi |
https://doi.org/10.1007/s00531-006-0086-6 |
container_title |
International Journal of Earth Sciences |
container_volume |
96 |
container_issue |
1 |
container_start_page |
121 |
op_container_end_page |
140 |
_version_ |
1766031506069782528 |