Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history
Tephra isochrons offer considerable potential for correlating diverse palaeoarchives and highlighting regional climatic differences. They are especially useful when applied to polar ice records encompassing the last glacial, as these clearly portray the pronounced millennial-scale climate variabilit...
Published in: | Quaternary Science Reviews |
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Online Access: | https://hdl.handle.net/20.500.12079/1879 https://doi.org/10.1016/j.quascirev.2017.04.025 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018383630&doi=10.1016%2fj.quascirev.2017.04.025&partnerID=40&md5=6692f41841b4486e57f1ed1adb382806 |
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ftenea:oai:iris.enea.it:20.500.12079/1879 2024-03-31T07:48:49+00:00 Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history Narcisi, B. Narcisi, B. 2017 https://hdl.handle.net/20.500.12079/1879 https://doi.org/10.1016/j.quascirev.2017.04.025 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018383630&doi=10.1016%2fj.quascirev.2017.04.025&partnerID=40&md5=6692f41841b4486e57f1ed1adb382806 en eng Elsevier Ltd volume:165 numberofpages:111 - 126 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/20.500.12079/1879 doi:10.1016/j.quascirev.2017.04.025 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85018383630 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018383630&doi=10.1016%2fj.quascirev.2017.04.025&partnerID=40&md5=6692f41841b4486e57f1ed1adb382806 Last glacial period Antarctic ice core Millennial-scale climate variability Volcanic glass composition Tephra layer Northern Victoria Land volcanism Explosive eruptions info:eu-repo/semantics/article 2017 ftenea https://doi.org/20.500.12079/187910.1016/j.quascirev.2017.04.025 2024-03-06T00:15:28Z Tephra isochrons offer considerable potential for correlating diverse palaeoarchives and highlighting regional climatic differences. They are especially useful when applied to polar ice records encompassing the last glacial, as these clearly portray the pronounced millennial-scale climate variability that characterised this period. Here we present the continuous record of primary fallout tephra layers in the East Antarctic Talos Dome ice core (72°49′S, 159°11′E), developed upon examination of the core sections spanning the glacial period 16.5 to 71 ka. A total of ca. 45 discrete tephra deposits precisely positioned stratigraphically relative to the temperature record for the core and dated using the AICC2012 timescale, were identified. Quantitative grain size, particle morphology, major and trace element composition using Coulter Counter, SEM, EPMA-WDS, and LA-ICP-MS analytical methods were studied as diagnostic features for tephra characterisation. The tephrostratigraphic framework provides a reference for future precise comparison between ice and sediment sequences across the Antarctic continent. Indeed, several potential markers characterised by distinct volcanic glass geochemistry and/or particular stratigraphic location (e.g., a 17.6-ka ash layer deposited during the well-known major acidity event) are now available for the direct linkage of palaeoclimatic archives. The Talos Dome tephra sequence, dominated by mid-distal pyroclastic products from the nearby Northern Victoria Land volcanoes, also represents the most comprehensive and best time-constrained record of regional Antarctic volcanism yet developed. It documents nearly continuous sustained explosive activity during the considered time interval and, combined with previous ice-core tephra results for the last and the current interglacial periods, suggests progressive compositional shift through time. © 2017 Elsevier Ltd Article in Journal/Newspaper Antarc* Antarctic ice core Victoria Land ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) Antarctic Coulter ENVELOPE(-58.033,-58.033,-83.283,-83.283) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Antarctic Victoria Land Quaternary Science Reviews 165 111 126 |
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 |
Last glacial period Antarctic ice core Millennial-scale climate variability Volcanic glass composition Tephra layer Northern Victoria Land volcanism Explosive eruptions |
spellingShingle |
Last glacial period Antarctic ice core Millennial-scale climate variability Volcanic glass composition Tephra layer Northern Victoria Land volcanism Explosive eruptions Narcisi, B. Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
topic_facet |
Last glacial period Antarctic ice core Millennial-scale climate variability Volcanic glass composition Tephra layer Northern Victoria Land volcanism Explosive eruptions |
description |
Tephra isochrons offer considerable potential for correlating diverse palaeoarchives and highlighting regional climatic differences. They are especially useful when applied to polar ice records encompassing the last glacial, as these clearly portray the pronounced millennial-scale climate variability that characterised this period. Here we present the continuous record of primary fallout tephra layers in the East Antarctic Talos Dome ice core (72°49′S, 159°11′E), developed upon examination of the core sections spanning the glacial period 16.5 to 71 ka. A total of ca. 45 discrete tephra deposits precisely positioned stratigraphically relative to the temperature record for the core and dated using the AICC2012 timescale, were identified. Quantitative grain size, particle morphology, major and trace element composition using Coulter Counter, SEM, EPMA-WDS, and LA-ICP-MS analytical methods were studied as diagnostic features for tephra characterisation. The tephrostratigraphic framework provides a reference for future precise comparison between ice and sediment sequences across the Antarctic continent. Indeed, several potential markers characterised by distinct volcanic glass geochemistry and/or particular stratigraphic location (e.g., a 17.6-ka ash layer deposited during the well-known major acidity event) are now available for the direct linkage of palaeoclimatic archives. The Talos Dome tephra sequence, dominated by mid-distal pyroclastic products from the nearby Northern Victoria Land volcanoes, also represents the most comprehensive and best time-constrained record of regional Antarctic volcanism yet developed. It documents nearly continuous sustained explosive activity during the considered time interval and, combined with previous ice-core tephra results for the last and the current interglacial periods, suggests progressive compositional shift through time. © 2017 Elsevier Ltd |
author2 |
Narcisi, B. |
format |
Article in Journal/Newspaper |
author |
Narcisi, B. |
author_facet |
Narcisi, B. |
author_sort |
Narcisi, B. |
title |
Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
title_short |
Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
title_full |
Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
title_fullStr |
Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
title_full_unstemmed |
Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history |
title_sort |
last glacial tephra layers in the talos dome ice core (peripheral east antarctic plateau), with implications for chronostratigraphic correlations and regional volcanic history |
publisher |
Elsevier Ltd |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.12079/1879 https://doi.org/10.1016/j.quascirev.2017.04.025 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018383630&doi=10.1016%2fj.quascirev.2017.04.025&partnerID=40&md5=6692f41841b4486e57f1ed1adb382806 |
long_lat |
ENVELOPE(-58.033,-58.033,-83.283,-83.283) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic Coulter Talos Dome The Antarctic Victoria Land |
geographic_facet |
Antarctic Coulter Talos Dome The Antarctic Victoria Land |
genre |
Antarc* Antarctic ice core Victoria Land |
genre_facet |
Antarc* Antarctic ice core Victoria Land |
op_relation |
volume:165 numberofpages:111 - 126 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/20.500.12079/1879 doi:10.1016/j.quascirev.2017.04.025 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85018383630 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018383630&doi=10.1016%2fj.quascirev.2017.04.025&partnerID=40&md5=6692f41841b4486e57f1ed1adb382806 |
op_doi |
https://doi.org/20.500.12079/187910.1016/j.quascirev.2017.04.025 |
container_title |
Quaternary Science Reviews |
container_volume |
165 |
container_start_page |
111 |
op_container_end_page |
126 |
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1795035507787300864 |