High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation
Abstract Tephra abundance data and geochemistry in Late‐glacial and Holocene sediments on the East Greenland shelf are presented. Two well‐known tephras were identified from electron microprobe analysis of tephra shards picked from ash peaks in the cores. These are the Vedde Ash and Saksunarvatn Ash...
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crwiley:10.1002/jqs.692 2024-09-15T18:04:19+00:00 High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation Jennings, Anne E. Grönvold, Karl Hilberman, Rachael Smith, Mikie Hald, Morten US National Science Foundation, Arctic Natural Sciences. 2002 http://dx.doi.org/10.1002/jqs.692 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.692 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.692 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 17, issue 8, page 747-757 ISSN 0267-8179 1099-1417 journal-article 2002 crwiley https://doi.org/10.1002/jqs.692 2024-07-25T04:21:06Z Abstract Tephra abundance data and geochemistry in Late‐glacial and Holocene sediments on the East Greenland shelf are presented. Two well‐known tephras were identified from electron microprobe analysis of tephra shards picked from ash peaks in the cores. These are the Vedde Ash and Saksunarvatn Ash, which probably were deposited on the shelf after transport on drifting ice. The radiocarbon dates (marine reservoir corrected by −550 yr) that constrain the timing of deposition of the tephra layers compare well with the terrestrial and ice‐core ages of the tephras without requiring additional reservoir correction to align them with the known tephra ages. Several prominent tephra layers with a composition of Ash Zone 2 tephra punctuate the deglacial sediments. These tephra peaks coincide with significant light stable isotope events (signifying glacial meltwater) and fine‐grained sediments poor in ice‐rafted detritus. We interpret the Ash Zone 2 tephra peaks as sediment released from the Greenland Ice Sheet during strong melting pulses of the deglaciation. Copyright © 2002 John Wiley & Sons, Ltd. Article in Journal/Newspaper East Greenland Greenland ice core Ice Sheet Kangerlussuaq Wiley Online Library Journal of Quaternary Science 17 8 747 757 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Tephra abundance data and geochemistry in Late‐glacial and Holocene sediments on the East Greenland shelf are presented. Two well‐known tephras were identified from electron microprobe analysis of tephra shards picked from ash peaks in the cores. These are the Vedde Ash and Saksunarvatn Ash, which probably were deposited on the shelf after transport on drifting ice. The radiocarbon dates (marine reservoir corrected by −550 yr) that constrain the timing of deposition of the tephra layers compare well with the terrestrial and ice‐core ages of the tephras without requiring additional reservoir correction to align them with the known tephra ages. Several prominent tephra layers with a composition of Ash Zone 2 tephra punctuate the deglacial sediments. These tephra peaks coincide with significant light stable isotope events (signifying glacial meltwater) and fine‐grained sediments poor in ice‐rafted detritus. We interpret the Ash Zone 2 tephra peaks as sediment released from the Greenland Ice Sheet during strong melting pulses of the deglaciation. Copyright © 2002 John Wiley & Sons, Ltd. |
author2 |
US National Science Foundation, Arctic Natural Sciences. |
format |
Article in Journal/Newspaper |
author |
Jennings, Anne E. Grönvold, Karl Hilberman, Rachael Smith, Mikie Hald, Morten |
spellingShingle |
Jennings, Anne E. Grönvold, Karl Hilberman, Rachael Smith, Mikie Hald, Morten High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
author_facet |
Jennings, Anne E. Grönvold, Karl Hilberman, Rachael Smith, Mikie Hald, Morten |
author_sort |
Jennings, Anne E. |
title |
High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
title_short |
High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
title_full |
High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
title_fullStr |
High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
title_full_unstemmed |
High‐resolution study of Icelandic tephras in the Kangerlussuaq Trough, southeast Greenland, during the last deglaciation |
title_sort |
high‐resolution study of icelandic tephras in the kangerlussuaq trough, southeast greenland, during the last deglaciation |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1002/jqs.692 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.692 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.692 |
genre |
East Greenland Greenland ice core Ice Sheet Kangerlussuaq |
genre_facet |
East Greenland Greenland ice core Ice Sheet Kangerlussuaq |
op_source |
Journal of Quaternary Science volume 17, issue 8, page 747-757 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.692 |
container_title |
Journal of Quaternary Science |
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17 |
container_issue |
8 |
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747 |
op_container_end_page |
757 |
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1810441809215619072 |