A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka

Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from the Labrador Sea, spanning the last 65.5 ka, an area and time period that has...

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Published in:Journal of Quaternary Science
Main Authors: Rutledal, Sunniva, Haflidason, Hafkidi, Berben, Sarah Mp, Griem, Lisa, Jansen, Eystein
Format: Text
Language:English
Published: Wiley / Blackwell 2020
Subjects:
geo
Online Access:https://doi.org/10.1002/jqs.3241
https://archimer.ifremer.fr/doc/00648/76044/76980.pdf
https://archimer.ifremer.fr/doc/00648/76044/76981.png
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spelling fttriple:oai:gotriple.eu:10670/1.kapakf 2023-05-15T16:03:49+02:00 A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka Rutledal, Sunniva Haflidason, Hafkidi Berben, Sarah Mp Griem, Lisa Jansen, Eystein 2020-01-01 https://doi.org/10.1002/jqs.3241 https://archimer.ifremer.fr/doc/00648/76044/76980.pdf https://archimer.ifremer.fr/doc/00648/76044/76981.png en eng Wiley / Blackwell doi:10.1002/jqs.3241 10670/1.kapakf https://archimer.ifremer.fr/doc/00648/76044/76980.pdf https://archimer.ifremer.fr/doc/00648/76044/76981.png other Archimer, archive institutionnelle de l'Ifremer Journal Of Quaternary Science (0267-8179) (Wiley / Blackwell), 2020-10 , Vol. 35 , N. 7 , P. 855-868 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2020 fttriple https://doi.org/10.1002/jqs.3241 2023-01-22T18:02:25Z Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from the Labrador Sea, spanning the last 65.5 ka, an area and time period that has not been investigated in detail within the established North Atlantic tephra framework. We investigated marine sediment core GS16]204] 22CC for increased tephra occurrences and geochemically analysed the major element composition of tephra shards to identify their source volcano(es). In total we observed eight tephra zones, of which five concentration peaks show isochronous features that can be used as independent tie]points in future studies. The main transport mechanism of tephra shards to the site was near]instantaneous deposition by drifting of sea ice along the East Greenland Current. Our results show that the Icelandic Veidivotn volcanic system was the dominant source of tephra material, especially between late Marine Isotope Stage (MIS) 4 and early MIS 3. The Veidivotn system generated volcanic eruptions in cycles of ca. 3.5 ka. We speculate that the quantity of tephra delivered to the Labrador Sea was a result of variable Icelandic ice volume and/or changes in the transportation pathway towards the Labrador Sea. Text East Greenland east greenland current Greenland Labrador Sea North Atlantic Sea ice Unknown Greenland Journal of Quaternary Science 35 7 855 868
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic geo
envir
spellingShingle geo
envir
Rutledal, Sunniva
Haflidason, Hafkidi
Berben, Sarah Mp
Griem, Lisa
Jansen, Eystein
A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
topic_facet geo
envir
description Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from the Labrador Sea, spanning the last 65.5 ka, an area and time period that has not been investigated in detail within the established North Atlantic tephra framework. We investigated marine sediment core GS16]204] 22CC for increased tephra occurrences and geochemically analysed the major element composition of tephra shards to identify their source volcano(es). In total we observed eight tephra zones, of which five concentration peaks show isochronous features that can be used as independent tie]points in future studies. The main transport mechanism of tephra shards to the site was near]instantaneous deposition by drifting of sea ice along the East Greenland Current. Our results show that the Icelandic Veidivotn volcanic system was the dominant source of tephra material, especially between late Marine Isotope Stage (MIS) 4 and early MIS 3. The Veidivotn system generated volcanic eruptions in cycles of ca. 3.5 ka. We speculate that the quantity of tephra delivered to the Labrador Sea was a result of variable Icelandic ice volume and/or changes in the transportation pathway towards the Labrador Sea.
format Text
author Rutledal, Sunniva
Haflidason, Hafkidi
Berben, Sarah Mp
Griem, Lisa
Jansen, Eystein
author_facet Rutledal, Sunniva
Haflidason, Hafkidi
Berben, Sarah Mp
Griem, Lisa
Jansen, Eystein
author_sort Rutledal, Sunniva
title A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
title_short A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
title_full A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
title_fullStr A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
title_full_unstemmed A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
title_sort continuous tephrostratigraphic record from the labrador sea spanning the last 65 ka
publisher Wiley / Blackwell
publishDate 2020
url https://doi.org/10.1002/jqs.3241
https://archimer.ifremer.fr/doc/00648/76044/76980.pdf
https://archimer.ifremer.fr/doc/00648/76044/76981.png
geographic Greenland
geographic_facet Greenland
genre East Greenland
east greenland current
Greenland
Labrador Sea
North Atlantic
Sea ice
genre_facet East Greenland
east greenland current
Greenland
Labrador Sea
North Atlantic
Sea ice
op_source Archimer, archive institutionnelle de l'Ifremer
Journal Of Quaternary Science (0267-8179) (Wiley / Blackwell), 2020-10 , Vol. 35 , N. 7 , P. 855-868
op_relation doi:10.1002/jqs.3241
10670/1.kapakf
https://archimer.ifremer.fr/doc/00648/76044/76980.pdf
https://archimer.ifremer.fr/doc/00648/76044/76981.png
op_rights other
op_doi https://doi.org/10.1002/jqs.3241
container_title Journal of Quaternary Science
container_volume 35
container_issue 7
container_start_page 855
op_container_end_page 868
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