Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains
International audience 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...
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ftinsu:oai:HAL:hal-01765489v1 2023-12-17T10:21:57+01:00 Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains Folco, Luigi d'Orazio, Massimo Gemelli, Maurizio Rochette, Pierre Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2016 https://hal.science/hal-01765489 https://doi.org/10.1016/j.polar.2016.02.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.polar.2016.02.004 hal-01765489 https://hal.science/hal-01765489 doi:10.1016/j.polar.2016.02.004 ISSN: 1873-9652 Polar Science https://hal.science/hal-01765489 Polar Science, 2016, 10 (2), pp.147-159. ⟨10.1016/j.polar.2016.02.004⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1016/j.polar.2016.02.004 2023-11-22T17:47:48Z International audience 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 Polar Science Polar Science Rennick Glacier Victoria Land Institut national des sciences de l'Univers: HAL-INSU 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 |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Folco, Luigi d'Orazio, Massimo Gemelli, Maurizio Rochette, Pierre Stretching out the Australasian microtektite strewn field in Victoria Land Transantarctic Mountains |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Folco, Luigi d'Orazio, Massimo Gemelli, Maurizio Rochette, Pierre |
author_facet |
Folco, Luigi d'Orazio, Massimo Gemelli, Maurizio Rochette, Pierre |
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 |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01765489 https://doi.org/10.1016/j.polar.2016.02.004 |
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 Polar Science Polar Science Rennick Glacier Victoria Land |
genre_facet |
Antarc* Antarctic Ice Sheet Polar Science Polar Science Rennick Glacier Victoria Land |
op_source |
ISSN: 1873-9652 Polar Science https://hal.science/hal-01765489 Polar Science, 2016, 10 (2), pp.147-159. ⟨10.1016/j.polar.2016.02.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.polar.2016.02.004 hal-01765489 https://hal.science/hal-01765489 doi:10.1016/j.polar.2016.02.004 |
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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1785541150531125248 |