Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains
Petrographic and geochemical studies of microtektites collected in newly explored summit plateaus of the Transantarctic Mountains (i.e., Schroeder Spur, Killer Nunatak, Miller Butte in the inland catchment of the Rennick Glacier, and Allan Hills, in the inland catchment of the Mackay-David Glaciers)...
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Online Access: | http://hdl.handle.net/11568/794612 https://doi.org/10.1016/j.polar.2016.02.004 http://www.sciencedirect.com/science/article/pii/S187396521630007X |
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ftunivpisairis:oai:arpi.unipi.it:11568/794612 2024-02-27T08:35:14+00:00 Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains FOLCO, LUIGI D'ORAZIO, MASSIMO GEMELLI, MAURIZIO Rochette, P. Folco, Luigi D'Orazio, Massimo Gemelli, Maurizio Rochette, P. 2016 STAMPA http://hdl.handle.net/11568/794612 https://doi.org/10.1016/j.polar.2016.02.004 http://www.sciencedirect.com/science/article/pii/S187396521630007X eng eng info:eu-repo/semantics/altIdentifier/wos/000375557500005 volume:10 issue:2 firstpage:147 lastpage:159 numberofpages:13 journal:POLAR SCIENCE http://hdl.handle.net/11568/794612 doi:10.1016/j.polar.2016.02.004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84960970972 http://www.sciencedirect.com/science/article/pii/S187396521630007X info:eu-repo/semantics/restrictedAccess Microtektites Transantarctic Mountains East Antarctic Ice Sheet Impact cratering info:eu-repo/semantics/article 2016 ftunivpisairis https://doi.org/10.1016/j.polar.2016.02.004 2024-01-31T17:46:48Z Petrographic and geochemical studies of microtektites collected in newly explored summit plateaus of the Transantarctic Mountains (i.e., Schroeder Spur, Killer Nunatak, Miller Butte in the inland catchment of the Rennick Glacier, and Allan Hills, in the inland catchment of the Mackay-David Glaciers) document a regional distribution of Australasian microtektites in Victoria Land. A geochemical comparison with Australasian microtektites from deep sea sediments at lower latitudes identifies a possible projectile geochemical signature for the first time, and confirms that Transantarctic Mountains microtektites experienced higher thermal regimes. Ballistic calculations reveal that the extraordinary distance of the Transantarctic Mountains microtektites from the hypothetical impact location in Indochina (similar to 11,000 km) could be more efficiently attained at relatively low ejection angles (20 degrees-40 degrees). Finally, the occurrence of Australasian microtektites (similar to 0.8 Ma old) on specific glacial surfaces of the Antarctic bedrock constrains the glacial history of the East Antarctic Ice Sheet in Victoria Land. In particular, data from Allan Hills supports a glaciological scenario envisaging an extremely stable East Antarctic Ice Sheet over at least the last similar to 1 Ma in the inland catchment of the Mackay/David glaciers. This is consistent with the large accumulation of meteorites in the adjacent blue ice fields. (C) 2016 Elsevier B.V. and NIPR. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Rennick Glacier Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Antarctic East Antarctic Ice Sheet Killer Nunatak ENVELOPE(160.467,160.467,-71.900,-71.900) Mackay ENVELOPE(168.517,168.517,-77.700,-77.700) Miller Butte ENVELOPE(160.250,160.250,-72.700,-72.700) Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Rennick Glacier ENVELOPE(160.750,160.750,-70.500,-70.500) Schroeder Spur ENVELOPE(160.500,160.500,-71.633,-71.633) The Antarctic Transantarctic Mountains Victoria Land Polar Science 10 2 147 159 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Microtektites Transantarctic Mountains East Antarctic Ice Sheet Impact cratering |
spellingShingle |
Microtektites Transantarctic Mountains East Antarctic Ice Sheet Impact cratering FOLCO, LUIGI D'ORAZIO, MASSIMO GEMELLI, MAURIZIO Rochette, P. Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
topic_facet |
Microtektites Transantarctic Mountains East Antarctic Ice Sheet Impact cratering |
description |
Petrographic and geochemical studies of microtektites collected in newly explored summit plateaus of the Transantarctic Mountains (i.e., Schroeder Spur, Killer Nunatak, Miller Butte in the inland catchment of the Rennick Glacier, and Allan Hills, in the inland catchment of the Mackay-David Glaciers) document a regional distribution of Australasian microtektites in Victoria Land. A geochemical comparison with Australasian microtektites from deep sea sediments at lower latitudes identifies a possible projectile geochemical signature for the first time, and confirms that Transantarctic Mountains microtektites experienced higher thermal regimes. Ballistic calculations reveal that the extraordinary distance of the Transantarctic Mountains microtektites from the hypothetical impact location in Indochina (similar to 11,000 km) could be more efficiently attained at relatively low ejection angles (20 degrees-40 degrees). Finally, the occurrence of Australasian microtektites (similar to 0.8 Ma old) on specific glacial surfaces of the Antarctic bedrock constrains the glacial history of the East Antarctic Ice Sheet in Victoria Land. In particular, data from Allan Hills supports a glaciological scenario envisaging an extremely stable East Antarctic Ice Sheet over at least the last similar to 1 Ma in the inland catchment of the Mackay/David glaciers. This is consistent with the large accumulation of meteorites in the adjacent blue ice fields. (C) 2016 Elsevier B.V. and NIPR. All rights reserved. |
author2 |
Folco, Luigi D'Orazio, Massimo Gemelli, Maurizio Rochette, P. |
format |
Article in Journal/Newspaper |
author |
FOLCO, LUIGI D'ORAZIO, MASSIMO GEMELLI, MAURIZIO Rochette, P. |
author_facet |
FOLCO, LUIGI D'ORAZIO, MASSIMO GEMELLI, MAURIZIO Rochette, P. |
author_sort |
FOLCO, LUIGI |
title |
Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
title_short |
Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
title_full |
Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
title_fullStr |
Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
title_full_unstemmed |
Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
title_sort |
stretching out the australasian microtektite strewn field in victoria land transantarctic mountains |
publishDate |
2016 |
url |
http://hdl.handle.net/11568/794612 https://doi.org/10.1016/j.polar.2016.02.004 http://www.sciencedirect.com/science/article/pii/S187396521630007X |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) ENVELOPE(160.467,160.467,-71.900,-71.900) ENVELOPE(168.517,168.517,-77.700,-77.700) ENVELOPE(160.250,160.250,-72.700,-72.700) ENVELOPE(161.500,161.500,-72.000,-72.000) ENVELOPE(160.750,160.750,-70.500,-70.500) ENVELOPE(160.500,160.500,-71.633,-71.633) |
geographic |
Allan Hills Antarctic East Antarctic Ice Sheet Killer Nunatak Mackay Miller Butte Rennick Rennick Glacier Schroeder Spur The Antarctic Transantarctic Mountains Victoria Land |
geographic_facet |
Allan Hills Antarctic East Antarctic Ice Sheet Killer Nunatak Mackay Miller Butte Rennick Rennick Glacier Schroeder Spur The Antarctic Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Ice Sheet Rennick Glacier Victoria Land |
genre_facet |
Antarc* Antarctic Ice Sheet Rennick Glacier Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000375557500005 volume:10 issue:2 firstpage:147 lastpage:159 numberofpages:13 journal:POLAR SCIENCE http://hdl.handle.net/11568/794612 doi:10.1016/j.polar.2016.02.004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84960970972 http://www.sciencedirect.com/science/article/pii/S187396521630007X |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.polar.2016.02.004 |
container_title |
Polar Science |
container_volume |
10 |
container_issue |
2 |
container_start_page |
147 |
op_container_end_page |
159 |
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1792041703938457600 |