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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ftfuberlin:oai:refubium.fu-berlin.de:fub188/30653 2023-05-15T13:58:59+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. Decree, S. Harvey, R. P. Huwig, K. A. Hecht, Lutz Yang, S. Kaufmann, F. E. D. 2021 11 Seiten application/pdf https://refubium.fu-berlin.de/handle/fub188/30653 https://doi.org/10.17169/refubium-30392 https://doi.org/10.1126/sciadv.abc1008 eng eng https://refubium.fu-berlin.de/handle/fub188/30653 http://dx.doi.org/10.17169/refubium-30392 doi:10.1126/sciadv.abc1008 https://creativecommons.org/licenses/by-nc/4.0/ CC-BY-NC meteoritic event Antarctica condensation spherules ddc:551 doc-type:article 2021 ftfuberlin https://doi.org/10.17169/refubium-30392 https://doi.org/10.1126/sciadv.abc1008 2022-05-15T20:49:13Z 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 18O-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. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA Ice Sheet Freie Universität Berlin: Refubium (FU Berlin) 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) |
institution |
Open Polar |
collection |
Freie Universität Berlin: Refubium (FU Berlin) |
op_collection_id |
ftfuberlin |
language |
English |
topic |
meteoritic event Antarctica condensation spherules ddc:551 |
spellingShingle |
meteoritic event Antarctica condensation spherules ddc:551 Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decree, S. Harvey, R. P. Huwig, K. A. Hecht, Lutz Yang, S. Kaufmann, F. E. D. A large meteoritic event over Antarctica ca. 430 ka ago inferred from chondritic spherules from the Sør Rondane Mountains |
topic_facet |
meteoritic event Antarctica condensation spherules ddc:551 |
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 18O-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 |
Article in Journal/Newspaper |
author |
Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decree, S. Harvey, R. P. Huwig, K. A. Hecht, Lutz Yang, S. Kaufmann, F. E. D. |
author_facet |
Van Ginneken, M. Goderis, S. Artemieva, N. Debaille, V. Decree, S. Harvey, R. P. Huwig, K. A. Hecht, Lutz Yang, S. Kaufmann, F. E. D. |
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 |
publishDate |
2021 |
url |
https://refubium.fu-berlin.de/handle/fub188/30653 https://doi.org/10.17169/refubium-30392 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_relation |
https://refubium.fu-berlin.de/handle/fub188/30653 http://dx.doi.org/10.17169/refubium-30392 doi:10.1126/sciadv.abc1008 |
op_rights |
https://creativecommons.org/licenses/by-nc/4.0/ |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.17169/refubium-30392 https://doi.org/10.1126/sciadv.abc1008 |
_version_ |
1766267353242271744 |