Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica)
The similar to 790 ka Australasian (micro)tektite strewn field is one of the most recent and best-known examples of impact ejecta emplacement as the result of a large-scale cratering event across a considerable part of Earth's surface (>10% in area). The Australasian strewn field is characte...
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ftunivgent:oai:archive.ugent.be:8719808 2023-06-11T04:04:07+02:00 Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) Soens, Bastien van Ginneken, Matthias Chernonozhkin, Stepan M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven 2021 application/pdf https://biblio.ugent.be/publication/8719808 http://hdl.handle.net/1854/LU-8719808 https://doi.org/10.1016/j.gsf.2021.101153 https://biblio.ugent.be/publication/8719808/file/8719809 eng eng https://biblio.ugent.be/publication/8719808 http://hdl.handle.net/1854/LU-8719808 http://dx.doi.org/10.1016/j.gsf.2021.101153 https://biblio.ugent.be/publication/8719808/file/8719809 Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License (CC BY-NC-ND 4.0) info:eu-repo/semantics/openAccess GEOSCIENCE FRONTIERS ISSN: 1674-9871 Chemistry General Earth and Planetary Sciences Impact cratering Impact ejecta Target stratigraphy Volatilization Antarctica Microtektites TRANSANTARCTIC MOUNTAINS FRONTIER MOUNTAIN COSMIC SPHERULES SHOCKED QUARTZ TEKTITES SIZE VICTORIA LAND ND BE-10 ABUNDANCES AMERICAN journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivgent https://doi.org/10.1016/j.gsf.2021.101153 2023-04-19T22:10:13Z The similar to 790 ka Australasian (micro)tektite strewn field is one of the most recent and best-known examples of impact ejecta emplacement as the result of a large-scale cratering event across a considerable part of Earth's surface (>10% in area). The Australasian strewn field is characterized by a tri-lobe pattern consisting of a large central distribution lobe, and two smaller side lobes extending to the west and east. Here, we report on the discovery of microtektite-like particles in sedimentary traps, containing abundant micrometeorite material, in the Sor Rondane Mountain (SRM) range of East Antarctica. The thirty-three glassy particles display a characteristic pale yellow color and are predominantly spherical in shape, except for a single dumbbell-shaped particle. The vitreous spherules range in size from 220 to 570 mu m, with an average diameter of similar to 370 mu m. This compares relatively well with the size distribution (75-778 mu m) of Australasian microtektites previously recovered from the Transantarctic Mountains (TAM) and located ca. 2500-3000 km from the SRM. In addition, the chemical composition of the SRM particles exhibits limited variation and is nearly identical to the 'normal-type' (i.e., <6% MgO) TAM microtektites. The Sr and Nd isotope systematics for a single batch of SRM particles (n=26) strongly support their affiliation with TAM microtektites and the Australasian tektite strewn field in general. Furthermore, Sr isotope ratios and Nd model ages suggest that the target material of the SRM particles was composed of a plagioclase- or carbonate-rich lithology derived from a Paleo- or Mesoproterozoic crustal unit. The affiliation to the Australasian strewn field requires long-range transportation, with estimated great circle distances of ca. 11,600 km from the hypothetical source crater, provided transportation occurred along the central distribution lobe. This is in agreement with the observations made for the Australasian microtektites recovered from Victoria Land (ca. 11,000 ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land Ghent University Academic Bibliography Antarctic The Antarctic East Antarctica Victoria Land Transantarctic Mountains Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) Sor-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) Frontier Mountain ENVELOPE(160.333,160.333,-72.983,-72.983) Geoscience Frontiers 12 4 101153 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Chemistry General Earth and Planetary Sciences Impact cratering Impact ejecta Target stratigraphy Volatilization Antarctica Microtektites TRANSANTARCTIC MOUNTAINS FRONTIER MOUNTAIN COSMIC SPHERULES SHOCKED QUARTZ TEKTITES SIZE VICTORIA LAND ND BE-10 ABUNDANCES AMERICAN |
spellingShingle |
Chemistry General Earth and Planetary Sciences Impact cratering Impact ejecta Target stratigraphy Volatilization Antarctica Microtektites TRANSANTARCTIC MOUNTAINS FRONTIER MOUNTAIN COSMIC SPHERULES SHOCKED QUARTZ TEKTITES SIZE VICTORIA LAND ND BE-10 ABUNDANCES AMERICAN Soens, Bastien van Ginneken, Matthias Chernonozhkin, Stepan M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
topic_facet |
Chemistry General Earth and Planetary Sciences Impact cratering Impact ejecta Target stratigraphy Volatilization Antarctica Microtektites TRANSANTARCTIC MOUNTAINS FRONTIER MOUNTAIN COSMIC SPHERULES SHOCKED QUARTZ TEKTITES SIZE VICTORIA LAND ND BE-10 ABUNDANCES AMERICAN |
description |
The similar to 790 ka Australasian (micro)tektite strewn field is one of the most recent and best-known examples of impact ejecta emplacement as the result of a large-scale cratering event across a considerable part of Earth's surface (>10% in area). The Australasian strewn field is characterized by a tri-lobe pattern consisting of a large central distribution lobe, and two smaller side lobes extending to the west and east. Here, we report on the discovery of microtektite-like particles in sedimentary traps, containing abundant micrometeorite material, in the Sor Rondane Mountain (SRM) range of East Antarctica. The thirty-three glassy particles display a characteristic pale yellow color and are predominantly spherical in shape, except for a single dumbbell-shaped particle. The vitreous spherules range in size from 220 to 570 mu m, with an average diameter of similar to 370 mu m. This compares relatively well with the size distribution (75-778 mu m) of Australasian microtektites previously recovered from the Transantarctic Mountains (TAM) and located ca. 2500-3000 km from the SRM. In addition, the chemical composition of the SRM particles exhibits limited variation and is nearly identical to the 'normal-type' (i.e., <6% MgO) TAM microtektites. The Sr and Nd isotope systematics for a single batch of SRM particles (n=26) strongly support their affiliation with TAM microtektites and the Australasian tektite strewn field in general. Furthermore, Sr isotope ratios and Nd model ages suggest that the target material of the SRM particles was composed of a plagioclase- or carbonate-rich lithology derived from a Paleo- or Mesoproterozoic crustal unit. The affiliation to the Australasian strewn field requires long-range transportation, with estimated great circle distances of ca. 11,600 km from the hypothetical source crater, provided transportation occurred along the central distribution lobe. This is in agreement with the observations made for the Australasian microtektites recovered from Victoria Land (ca. 11,000 ... |
format |
Article in Journal/Newspaper |
author |
Soens, Bastien van Ginneken, Matthias Chernonozhkin, Stepan M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven |
author_facet |
Soens, Bastien van Ginneken, Matthias Chernonozhkin, Stepan M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven |
author_sort |
Soens, Bastien |
title |
Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
title_short |
Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
title_full |
Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
title_fullStr |
Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
title_full_unstemmed |
Australasian microtektites across the Antarctic continent : evidence from the Sør Rondane Mountain range (East Antarctica) |
title_sort |
australasian microtektites across the antarctic continent : evidence from the sør rondane mountain range (east antarctica) |
publishDate |
2021 |
url |
https://biblio.ugent.be/publication/8719808 http://hdl.handle.net/1854/LU-8719808 https://doi.org/10.1016/j.gsf.2021.101153 https://biblio.ugent.be/publication/8719808/file/8719809 |
long_lat |
ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(160.333,160.333,-72.983,-72.983) |
geographic |
Antarctic The Antarctic East Antarctica Victoria Land Transantarctic Mountains Sør-Rondane Sor-Rondane Frontier Mountain |
geographic_facet |
Antarctic The Antarctic East Antarctica Victoria Land Transantarctic Mountains Sør-Rondane Sor-Rondane Frontier Mountain |
genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
op_source |
GEOSCIENCE FRONTIERS ISSN: 1674-9871 |
op_relation |
https://biblio.ugent.be/publication/8719808 http://hdl.handle.net/1854/LU-8719808 http://dx.doi.org/10.1016/j.gsf.2021.101153 https://biblio.ugent.be/publication/8719808/file/8719809 |
op_rights |
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License (CC BY-NC-ND 4.0) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gsf.2021.101153 |
container_title |
Geoscience Frontiers |
container_volume |
12 |
container_issue |
4 |
container_start_page |
101153 |
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1768385535567462400 |