A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica)
Englacial tephra provide chronostratigraphic markers in the Antarctic ice sheets. Structural, mineralogical, geochemical and geochronological data on selected samples allowed the reconstruction of a chronostratigraphic framework for the Frontier Mountain blue-ice field-an important meteorite trap on...
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Online Access: | http://hdl.handle.net/11568/123801 https://doi.org/10.1016/j.quascirev.2007.11.017 |
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ftunivpisairis:oai:arpi.unipi.it:11568/123801 2024-04-14T08:02:18+00:00 A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) Curzio P Laurenzi M Mellini M Zeoli A. FOLCO, LUIGI Curzio, P Folco, Luigi Laurenzi, M Mellini, M Zeoli, A. 2008 STAMPA http://hdl.handle.net/11568/123801 https://doi.org/10.1016/j.quascirev.2007.11.017 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000255351900013 volume:27 firstpage:602 lastpage:620 numberofpages:19 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/123801 doi:10.1016/j.quascirev.2007.11.017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-40849100059 info:eu-repo/semantics/article 2008 ftunivpisairis https://doi.org/10.1016/j.quascirev.2007.11.017 2024-03-21T18:30:13Z Englacial tephra provide chronostratigraphic markers in the Antarctic ice sheets. Structural, mineralogical, geochemical and geochronological data on selected samples allowed the reconstruction of a chronostratigraphic framework for the Frontier Mountain blue-ice field-an important meteorite trap on the southeastern flank of Talos Dome in northern Victoria Land. The stratigraphic thickness of the blue-ice succession is ∼1150 m. The 40Ar- 39Ar age of one layer close to the stratigraphic bottom of the ice succession is 100±5 ka and constrains the maximum age of the bulk of Frontier Mountain blue ice. The 49±11 ka age of a second layer at a depth of ∼950 m in the stratigraphic succession indicates that >90% of the ice is younger than this value. These ages agree well with the terrestrial ages of meteorites found on the blue ice (up to 140±30 ka), suggesting a mechanism of exhumation of meteorites by ablation after englacial transport. Particle size (up to several tens of microns) and the alkaline compositional character of 22 layers allow correlation with source volcanoes within the Cenozoic magmatism associated with the West Antarctic Rift System. The proximal Mount Melbourne, Mount Rittman and The Pleiades (within a radius of ∼250 km) are the best candidate source volcanoes. The reconstructed chronostratigraphic framework thus lays the foundations for a detailed investigation of ∼100 ka of explosive volcanism in northern Victoria Land. Furthermore, in light of the ongoing ice core drilling project at Talos Dome, the Frontier Mountain ice succession may become important for establishing regional correlations, for sampling and dating key tephra layers, and for selecting ice successions for high-resolution studies of past atmospheric chemistry and fallout. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Frontier Mountain ENVELOPE(160.333,160.333,-72.983,-72.983) Melbourne Mount ENVELOPE(164.700,164.700,-74.350,-74.350) Mount Melbourne ENVELOPE(164.700,164.700,-74.350,-74.350) Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Antarctic The Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Victoria Land Quaternary Science Reviews 27 5-6 602 620 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
description |
Englacial tephra provide chronostratigraphic markers in the Antarctic ice sheets. Structural, mineralogical, geochemical and geochronological data on selected samples allowed the reconstruction of a chronostratigraphic framework for the Frontier Mountain blue-ice field-an important meteorite trap on the southeastern flank of Talos Dome in northern Victoria Land. The stratigraphic thickness of the blue-ice succession is ∼1150 m. The 40Ar- 39Ar age of one layer close to the stratigraphic bottom of the ice succession is 100±5 ka and constrains the maximum age of the bulk of Frontier Mountain blue ice. The 49±11 ka age of a second layer at a depth of ∼950 m in the stratigraphic succession indicates that >90% of the ice is younger than this value. These ages agree well with the terrestrial ages of meteorites found on the blue ice (up to 140±30 ka), suggesting a mechanism of exhumation of meteorites by ablation after englacial transport. Particle size (up to several tens of microns) and the alkaline compositional character of 22 layers allow correlation with source volcanoes within the Cenozoic magmatism associated with the West Antarctic Rift System. The proximal Mount Melbourne, Mount Rittman and The Pleiades (within a radius of ∼250 km) are the best candidate source volcanoes. The reconstructed chronostratigraphic framework thus lays the foundations for a detailed investigation of ∼100 ka of explosive volcanism in northern Victoria Land. Furthermore, in light of the ongoing ice core drilling project at Talos Dome, the Frontier Mountain ice succession may become important for establishing regional correlations, for sampling and dating key tephra layers, and for selecting ice successions for high-resolution studies of past atmospheric chemistry and fallout. |
author2 |
Curzio, P Folco, Luigi Laurenzi, M Mellini, M Zeoli, A. |
format |
Article in Journal/Newspaper |
author |
Curzio P Laurenzi M Mellini M Zeoli A. FOLCO, LUIGI |
spellingShingle |
Curzio P Laurenzi M Mellini M Zeoli A. FOLCO, LUIGI A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
author_facet |
Curzio P Laurenzi M Mellini M Zeoli A. FOLCO, LUIGI |
author_sort |
Curzio P |
title |
A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
title_short |
A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
title_full |
A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
title_fullStr |
A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
title_full_unstemmed |
A tephra chronostratigraphic framework for the Frontier Mountain blue ice field (northern Victoria Land, Antarctica) |
title_sort |
tephra chronostratigraphic framework for the frontier mountain blue ice field (northern victoria land, antarctica) |
publishDate |
2008 |
url |
http://hdl.handle.net/11568/123801 https://doi.org/10.1016/j.quascirev.2007.11.017 |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(160.333,160.333,-72.983,-72.983) ENVELOPE(164.700,164.700,-74.350,-74.350) ENVELOPE(164.700,164.700,-74.350,-74.350) ENVELOPE(165.533,165.533,-72.700,-72.700) ENVELOPE(158.000,158.000,-73.000,-73.000) ENVELOPE(165.533,165.533,-72.700,-72.700) |
geographic |
Antarctic Dome The Frontier Mountain Melbourne Mount Mount Melbourne Pleiades Talos Dome The Antarctic The Pleiades Victoria Land |
geographic_facet |
Antarctic Dome The Frontier Mountain Melbourne Mount Mount Melbourne Pleiades Talos Dome The Antarctic The Pleiades Victoria Land |
genre |
Antarc* Antarctic Antarctica ice core Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica ice core Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000255351900013 volume:27 firstpage:602 lastpage:620 numberofpages:19 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/123801 doi:10.1016/j.quascirev.2007.11.017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-40849100059 |
op_doi |
https://doi.org/10.1016/j.quascirev.2007.11.017 |
container_title |
Quaternary Science Reviews |
container_volume |
27 |
container_issue |
5-6 |
container_start_page |
602 |
op_container_end_page |
620 |
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1796313924504649728 |