A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land)
Polar ice sheets are remarkable repositories of tephra layers. The Talos Dome ice core (72°49'S, 159°11'E), drilled at the edge of the East Antarctic Plateau, close to Late Quaternary volcanoes, offers considerable potential to extend the current tephra time-stratigraphic framework. A teph...
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ftenea:oai:iris.enea.it:20.500.12079/2298 2024-03-31T07:48:26+00:00 A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) Narcisi, B. Narcisi, B. 2016 https://hdl.handle.net/20.500.12079/2298 https://doi.org/10.1016/j.gloplacha.2015.12.016 http://www.scopus.com/inward/record.url?eid=2-s2.0-84953299441&partnerID=40&md5=659f312111c111093764878033206f8a en eng Elsevier volume:137 numberofpages:69 - 78 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/20.500.12079/2298 doi:10.1016/j.gloplacha.2015.12.016 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-84953299441 http://www.scopus.com/inward/record.url?eid=2-s2.0-84953299441&partnerID=40&md5=659f312111c111093764878033206f8a Northern Victoria Land volcanism Antarctic ice core Tephrostratigraphy Last Interglacial Glass shard microanalysi Tephra layers info:eu-repo/semantics/article 2016 ftenea https://doi.org/20.500.12079/229810.1016/j.gloplacha.2015.12.016 2024-03-06T00:12:05Z Polar ice sheets are remarkable repositories of tephra layers. The Talos Dome ice core (72°49'S, 159°11'E), drilled at the edge of the East Antarctic Plateau, close to Late Quaternary volcanoes, offers considerable potential to extend the current tephra time-stratigraphic framework. A tephrochronological study was undertaken of the ice core sections related to the Last Interglacial and the transition to the subsequent glacial period. Thirteen macroscopically visible layers, interpreted to be related to primary deposition of fallout tephra, have been analysed for quantitative grain size and glass shard geochemistry. The layers, precisely framed within the climate (δ18O) record for the core, span in age from 111.6±1.9 to 123.3±2.2ka. Coarse particle size suggests origin from regional sources. Indeed, the vast majority of the samples display an alkaline affinity and trachytic composition that are both typical geochemical features of rifting Antarctic volcanism. Using subtle differences in the geochemical signatures and the comparison with data from previous studies, a few layers are attributed to known coeval Mt. Melbourne eruptions. Another sample subset is consistent with derivation from The Pleiades and Mt. Rittmann volcanoes. One peculiar trachytic glass population appears to be related to activity of the more distant Marie Byrd Land volcanoes. The newly detected tephras provide stratigraphic markers that could facilitate future synchronisation and dating of palaeoclimatic records. The Talos Dome tephra inventory also contributes significantly to the reconstruction of the Northern Victoria Land explosive volcanism, for which chronostratigraphic data for the Last Interglacial temporal segment are poor. © 2015 Elsevier B.V. Article in Journal/Newspaper Antarc* Antarctic ice core Marie Byrd Land Victoria Land ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) Antarctic Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Rittmann ENVELOPE(165.500,165.500,-73.450,-73.450) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Victoria Land Global and Planetary Change 137 69 78 |
institution |
Open Polar |
collection |
ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) |
op_collection_id |
ftenea |
language |
English |
topic |
Northern Victoria Land volcanism Antarctic ice core Tephrostratigraphy Last Interglacial Glass shard microanalysi Tephra layers |
spellingShingle |
Northern Victoria Land volcanism Antarctic ice core Tephrostratigraphy Last Interglacial Glass shard microanalysi Tephra layers Narcisi, B. A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
topic_facet |
Northern Victoria Land volcanism Antarctic ice core Tephrostratigraphy Last Interglacial Glass shard microanalysi Tephra layers |
description |
Polar ice sheets are remarkable repositories of tephra layers. The Talos Dome ice core (72°49'S, 159°11'E), drilled at the edge of the East Antarctic Plateau, close to Late Quaternary volcanoes, offers considerable potential to extend the current tephra time-stratigraphic framework. A tephrochronological study was undertaken of the ice core sections related to the Last Interglacial and the transition to the subsequent glacial period. Thirteen macroscopically visible layers, interpreted to be related to primary deposition of fallout tephra, have been analysed for quantitative grain size and glass shard geochemistry. The layers, precisely framed within the climate (δ18O) record for the core, span in age from 111.6±1.9 to 123.3±2.2ka. Coarse particle size suggests origin from regional sources. Indeed, the vast majority of the samples display an alkaline affinity and trachytic composition that are both typical geochemical features of rifting Antarctic volcanism. Using subtle differences in the geochemical signatures and the comparison with data from previous studies, a few layers are attributed to known coeval Mt. Melbourne eruptions. Another sample subset is consistent with derivation from The Pleiades and Mt. Rittmann volcanoes. One peculiar trachytic glass population appears to be related to activity of the more distant Marie Byrd Land volcanoes. The newly detected tephras provide stratigraphic markers that could facilitate future synchronisation and dating of palaeoclimatic records. The Talos Dome tephra inventory also contributes significantly to the reconstruction of the Northern Victoria Land explosive volcanism, for which chronostratigraphic data for the Last Interglacial temporal segment are poor. © 2015 Elsevier B.V. |
author2 |
Narcisi, B. |
format |
Article in Journal/Newspaper |
author |
Narcisi, B. |
author_facet |
Narcisi, B. |
author_sort |
Narcisi, B. |
title |
A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
title_short |
A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
title_full |
A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
title_fullStr |
A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
title_full_unstemmed |
A new Eemian record of Antarctic tephra layers retrieved from the Talos Dome ice core (Northern Victoria Land) |
title_sort |
new eemian record of antarctic tephra layers retrieved from the talos dome ice core (northern victoria land) |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://hdl.handle.net/20.500.12079/2298 https://doi.org/10.1016/j.gloplacha.2015.12.016 http://www.scopus.com/inward/record.url?eid=2-s2.0-84953299441&partnerID=40&md5=659f312111c111093764878033206f8a |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(165.533,165.533,-72.700,-72.700) ENVELOPE(165.500,165.500,-73.450,-73.450) ENVELOPE(158.000,158.000,-73.000,-73.000) ENVELOPE(165.533,165.533,-72.700,-72.700) |
geographic |
Antarctic Byrd Marie Byrd Land Pleiades Rittmann Talos Dome The Pleiades Victoria Land |
geographic_facet |
Antarctic Byrd Marie Byrd Land Pleiades Rittmann Talos Dome The Pleiades Victoria Land |
genre |
Antarc* Antarctic ice core Marie Byrd Land Victoria Land |
genre_facet |
Antarc* Antarctic ice core Marie Byrd Land Victoria Land |
op_relation |
volume:137 numberofpages:69 - 78 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/20.500.12079/2298 doi:10.1016/j.gloplacha.2015.12.016 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-84953299441 http://www.scopus.com/inward/record.url?eid=2-s2.0-84953299441&partnerID=40&md5=659f312111c111093764878033206f8a |
op_doi |
https://doi.org/20.500.12079/229810.1016/j.gloplacha.2015.12.016 |
container_title |
Global and Planetary Change |
container_volume |
137 |
container_start_page |
69 |
op_container_end_page |
78 |
_version_ |
1795031548456599552 |