A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains
Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geological record. Here, we describe condensation...
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ftpubmed:oai:pubmedcentral.nih.gov:8011977 2023-05-15T13:50:30+02:00 A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decrée, S. Harvey, R. P. Huwig, K. A. Hecht, L. Yang, S. Kaufmann, F. E. D. Soens, B. Humayun, M. Van Maldeghem, F. Genge, M. J. Claeys, P. 2021-03-31 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011977/ http://www.ncbi.nlm.nih.gov/pubmed/33789890 https://doi.org/10.1126/sciadv.abc1008 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011977/ http://www.ncbi.nlm.nih.gov/pubmed/33789890 http://dx.doi.org/10.1126/sciadv.abc1008 Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Research Articles Text 2021 ftpubmed https://doi.org/10.1126/sciadv.abc1008 2021-04-18T00:23:44Z Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geological record. Here, we describe condensation spherules found on top of Walnumfjellet in the Sør Rondane Mountains, Antarctica. Affinities with similar spherules found in EPICA Dome C and Dome Fuji ice cores suggest that these particles were produced during a single-asteroid impact ca. 430 thousand years (ka) ago. The lack of a confirmed crater on the Antarctic ice sheet and geochemical and (18)O-poor oxygen isotope signatures allow us to hypothesize that the impact particles result from a touchdown event, in which a projectile vapor jet interacts with the Antarctic ice sheet. Numerical models support a touchdown scenario. This study has implications for the identification and inventory of large cosmic events on Earth. Text Antarc* Antarctic Antarctica EPICA Ice Sheet PubMed Central (PMC) Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Sør Rondane Mountains ENVELOPE(25.000,25.000,-72.000,-72.000) Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) The Antarctic Walnumfjellet ENVELOPE(24.167,24.167,-72.100,-72.100) Science Advances 7 14 eabc1008 |
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Research Articles |
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Research Articles Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decrée, S. Harvey, R. P. Huwig, K. A. Hecht, L. Yang, S. Kaufmann, F. E. D. Soens, B. Humayun, M. Van Maldeghem, F. Genge, M. J. Claeys, P. A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
topic_facet |
Research Articles |
description |
Large airbursts, the most frequent hazardous impact events, are estimated to occur orders of magnitude more frequently than crater-forming impacts. However, finding traces of these events is impeded by the difficulty of identifying them in the recent geological record. Here, we describe condensation spherules found on top of Walnumfjellet in the Sør Rondane Mountains, Antarctica. Affinities with similar spherules found in EPICA Dome C and Dome Fuji ice cores suggest that these particles were produced during a single-asteroid impact ca. 430 thousand years (ka) ago. The lack of a confirmed crater on the Antarctic ice sheet and geochemical and (18)O-poor oxygen isotope signatures allow us to hypothesize that the impact particles result from a touchdown event, in which a projectile vapor jet interacts with the Antarctic ice sheet. Numerical models support a touchdown scenario. This study has implications for the identification and inventory of large cosmic events on Earth. |
format |
Text |
author |
Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decrée, S. Harvey, R. P. Huwig, K. A. Hecht, L. Yang, S. Kaufmann, F. E. D. Soens, B. Humayun, M. Van Maldeghem, F. Genge, M. J. Claeys, P. |
author_facet |
Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decrée, S. Harvey, R. P. Huwig, K. A. Hecht, L. Yang, S. Kaufmann, F. E. D. Soens, B. Humayun, M. Van Maldeghem, F. Genge, M. J. Claeys, P. |
author_sort |
Van Ginneken, M. |
title |
A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
title_short |
A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
title_full |
A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
title_fullStr |
A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
title_full_unstemmed |
A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
title_sort |
large meteoritic event over antarctica ca. 430 ka ago inferred from chondritic spherules from the sør rondane mountains |
publisher |
American Association for the Advancement of Science |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011977/ http://www.ncbi.nlm.nih.gov/pubmed/33789890 https://doi.org/10.1126/sciadv.abc1008 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(24.167,24.167,-72.100,-72.100) |
geographic |
Antarctic Dome Fuji Sør Rondane Mountains Sør-Rondane The Antarctic Walnumfjellet |
geographic_facet |
Antarctic Dome Fuji Sør Rondane Mountains Sør-Rondane The Antarctic Walnumfjellet |
genre |
Antarc* Antarctic Antarctica EPICA Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica EPICA Ice Sheet |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011977/ http://www.ncbi.nlm.nih.gov/pubmed/33789890 http://dx.doi.org/10.1126/sciadv.abc1008 |
op_rights |
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.abc1008 |
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Science Advances |
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14 |
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