A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
ABSTRACT 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...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3241 |
id |
crwiley:10.1002/jqs.3241 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/jqs.3241 2024-06-02T08:05:56+00:00 A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka Rutledal, Sunniva Haflidason, Haflidi Berben, Sarah M. P. Griem, Lisa Jansen, Eystein Norges Forskningsråd 2020 http://dx.doi.org/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3241 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Quaternary Science volume 35, issue 7, page 855-868 ISSN 0267-8179 1099-1417 journal-article 2020 crwiley https://doi.org/10.1002/jqs.3241 2024-05-03T11:27:09Z ABSTRACT 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 Veidivötn volcanic system was the dominant source of tephra material, especially between late Marine Isotope Stage (MIS) 4 and early MIS 3. The Veidivötn 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. Article in Journal/Newspaper East Greenland east greenland current Greenland Labrador Sea North Atlantic Sea ice Wiley Online Library Greenland Journal of Quaternary Science 35 7 855 868 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT 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 Veidivötn volcanic system was the dominant source of tephra material, especially between late Marine Isotope Stage (MIS) 4 and early MIS 3. The Veidivötn 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. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Rutledal, Sunniva Haflidason, Haflidi Berben, Sarah M. P. Griem, Lisa Jansen, Eystein |
spellingShingle |
Rutledal, Sunniva Haflidason, Haflidi Berben, Sarah M. P. Griem, Lisa Jansen, Eystein A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka |
author_facet |
Rutledal, Sunniva Haflidason, Haflidi Berben, Sarah M. P. 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 |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3241 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3241 |
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 |
Journal of Quaternary Science volume 35, issue 7, page 855-868 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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_ |
1800750819876798464 |