Last glacial tephra layers in the Talos Dome ice core (peripheral East Antarctic Plateau), with implications for chronostratigraphic correlations and regional volcanic history
International audience 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-s...
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ftunigrenoble:oai:HAL:insu-03706523v1 2024-04-28T07:56:36+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, Biancamaria Petit, Jean Robert Langone, Antonio Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) 2017 https://insu.hal.science/insu-03706523 https://doi.org/10.1016/j.quascirev.2017.04.025 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2017.04.025 insu-03706523 https://insu.hal.science/insu-03706523 BIBCODE: 2017QSRv.165.111N doi:10.1016/j.quascirev.2017.04.025 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://insu.hal.science/insu-03706523 Quaternary Science Reviews, 2017, 165, pp.111-126. ⟨10.1016/j.quascirev.2017.04.025⟩ Tephra layers Antarctic ice cores Last glacial period Millennial-scale climate variability Volcanic glass composition Northern Victoria Land volcanism Explosive eruptions [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2017 ftunigrenoble https://doi.org/10.1016/j.quascirev.2017.04.025 2024-04-18T03:04:26Z International audience 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. Article in Journal/Newspaper Antarc* Antarctic ice core Victoria Land Université Grenoble Alpes: HAL Quaternary Science Reviews 165 111 126 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Tephra layers Antarctic ice cores Last glacial period Millennial-scale climate variability Volcanic glass composition Northern Victoria Land volcanism Explosive eruptions [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Tephra layers Antarctic ice cores Last glacial period Millennial-scale climate variability Volcanic glass composition Northern Victoria Land volcanism Explosive eruptions [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Narcisi, Biancamaria Petit, Jean Robert Langone, Antonio 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 |
Tephra layers Antarctic ice cores Last glacial period Millennial-scale climate variability Volcanic glass composition Northern Victoria Land volcanism Explosive eruptions [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) |
format |
Article in Journal/Newspaper |
author |
Narcisi, Biancamaria Petit, Jean Robert Langone, Antonio |
author_facet |
Narcisi, Biancamaria Petit, Jean Robert Langone, Antonio |
author_sort |
Narcisi, Biancamaria |
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 |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-03706523 https://doi.org/10.1016/j.quascirev.2017.04.025 |
genre |
Antarc* Antarctic ice core Victoria Land |
genre_facet |
Antarc* Antarctic ice core Victoria Land |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://insu.hal.science/insu-03706523 Quaternary Science Reviews, 2017, 165, pp.111-126. ⟨10.1016/j.quascirev.2017.04.025⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2017.04.025 insu-03706523 https://insu.hal.science/insu-03706523 BIBCODE: 2017QSRv.165.111N doi:10.1016/j.quascirev.2017.04.025 |
op_doi |
https://doi.org/10.1016/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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1797583963929182208 |