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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2020
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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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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 |
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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 |
_version_ |
1766399500050497536 |