Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic
Ice-rafted tephra deposits, of Marine Isotope Stage 6 (MIS 6) age, from Site U 1304 on the Gardar Drift, North Atlantic were examined for their shard size distribution and major element composition. The heterogeneous composition, large shard sizes and association with ice-rafted debris (IRD) indicat...
Main Authors: | , , , |
---|---|
Format: | Book Part |
Language: | unknown |
Published: |
The Geological Society
2014
|
Subjects: | |
Online Access: | http://eprints.esc.cam.ac.uk/3169/ http://sp.lyellcollection.org/content/early/2014/02/05/SP398.8 |
id |
ftucambridgeesc:oai:eprints.esc.cam.ac.uk:3169 |
---|---|
record_format |
openpolar |
spelling |
ftucambridgeesc:oai:eprints.esc.cam.ac.uk:3169 2023-05-15T16:40:39+02:00 Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic Kuhs, Marion Austin, William E. N. Abbott, Peter M. Hodell, David A. 2014-02 http://eprints.esc.cam.ac.uk/3169/ http://sp.lyellcollection.org/content/early/2014/02/05/SP398.8 unknown The Geological Society Kuhs, Marion and Austin, William E. N. and Abbott, Peter M. and Hodell, David A. (2014) Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic. In: Marine Tephrochronology. Special publication, 398 (398). The Geological Society, pp. 141-155. 01 - Climate Change and Earth-Ocean Atmosphere Systems Book Section PeerReviewed 2014 ftucambridgeesc 2020-08-27T18:09:33Z Ice-rafted tephra deposits, of Marine Isotope Stage 6 (MIS 6) age, from Site U 1304 on the Gardar Drift, North Atlantic were examined for their shard size distribution and major element composition. The heterogeneous composition, large shard sizes and association with ice-rafted debris (IRD) indicate that these late MIS 6 deposits were transported by iceberg-rafting from Iceland to Site U 1304. Comparison of individual shard geochemistry with the geochemistry of Holocene volcanic systems from Iceland allows the identification of different potential volcanic source regions. This detailed geochemical analysis, when combined with Icelandic Ice Sheet (IIS) flow models for the Last Glacial Maximum (LGM), suggests that the IIS had calving margins to both the north and south during the late MIS 6 and that icebergs could have been transported to the Site U 1304 by following surface ocean circulation patterns similar to those that prevailed during the LGM. We demonstrate that the descriptive concept of Icelandic glass in the characterization of tephra components within North Atlantic IRD can be significantly improved through quantitative characterization and that such data hold the potential to help constrain surface ocean circulation models, while also potentially yielding new information about the IIS during earlier glacial periods. Supplementary material: Statistical tests, major element concentrations of analysed shards, primary and secondary standards are available at http://www.geolsoc.org.uk/SUP18716 Book Part Ice Sheet Iceland North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
unknown |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Kuhs, Marion Austin, William E. N. Abbott, Peter M. Hodell, David A. Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Ice-rafted tephra deposits, of Marine Isotope Stage 6 (MIS 6) age, from Site U 1304 on the Gardar Drift, North Atlantic were examined for their shard size distribution and major element composition. The heterogeneous composition, large shard sizes and association with ice-rafted debris (IRD) indicate that these late MIS 6 deposits were transported by iceberg-rafting from Iceland to Site U 1304. Comparison of individual shard geochemistry with the geochemistry of Holocene volcanic systems from Iceland allows the identification of different potential volcanic source regions. This detailed geochemical analysis, when combined with Icelandic Ice Sheet (IIS) flow models for the Last Glacial Maximum (LGM), suggests that the IIS had calving margins to both the north and south during the late MIS 6 and that icebergs could have been transported to the Site U 1304 by following surface ocean circulation patterns similar to those that prevailed during the LGM. We demonstrate that the descriptive concept of Icelandic glass in the characterization of tephra components within North Atlantic IRD can be significantly improved through quantitative characterization and that such data hold the potential to help constrain surface ocean circulation models, while also potentially yielding new information about the IIS during earlier glacial periods. Supplementary material: Statistical tests, major element concentrations of analysed shards, primary and secondary standards are available at http://www.geolsoc.org.uk/SUP18716 |
format |
Book Part |
author |
Kuhs, Marion Austin, William E. N. Abbott, Peter M. Hodell, David A. |
author_facet |
Kuhs, Marion Austin, William E. N. Abbott, Peter M. Hodell, David A. |
author_sort |
Kuhs, Marion |
title |
Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
title_short |
Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
title_full |
Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
title_fullStr |
Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
title_full_unstemmed |
Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic |
title_sort |
iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial north atlantic |
publisher |
The Geological Society |
publishDate |
2014 |
url |
http://eprints.esc.cam.ac.uk/3169/ http://sp.lyellcollection.org/content/early/2014/02/05/SP398.8 |
genre |
Ice Sheet Iceland North Atlantic |
genre_facet |
Ice Sheet Iceland North Atlantic |
op_relation |
Kuhs, Marion and Austin, William E. N. and Abbott, Peter M. and Hodell, David A. (2014) Iceberg-rafted tephra as a potential tool for the reconstruction of ice-sheet processes and ocean surface circulation in the glacial North Atlantic. In: Marine Tephrochronology. Special publication, 398 (398). The Geological Society, pp. 141-155. |
_version_ |
1766031048902180864 |