Australasian microtektites across the Antarctic continent: Evidence from the Sør Rondane Mountain range (East Antarctica)
The ~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...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/321121 2023-05-15T13:54:45+02:00 Australasian microtektites across the Antarctic continent: Evidence from the Sør Rondane Mountain range (East Antarctica) Soens, Bastien Van Ginneken, Matthias Chernonozhkin, Stepan S.M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven 2021-07 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/321121 https://dipot.ulb.ac.be/dspace/bitstream/2013/321121/1/doi_304765.pdf en eng uri/info:doi/10.1016/j.gsf.2021.101153 uri/info:pii/S1674987121000177 uri/info:scp/85101184016 https://dipot.ulb.ac.be/dspace/bitstream/2013/321121/1/doi_304765.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/321121 1 full-text file(s): info:eu-repo/semantics/openAccess Geoscience Frontiers, 12 (4 Sciences de la terre et du cosmos Antarctica Impact cratering Impact ejecta Microtektites Target stratigraphy Volatilization info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2021 ftunivbruxelles 2022-06-12T22:00:47Z The ~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 Sør 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 μm, with an average diameter of ~370 μm. This compares relatively well with the size distribution (75–778 μm) 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 km) and Larkman Nunatak ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic East Antarctica Larkman Nunatak ENVELOPE(179.383,179.383,-85.767,-85.767) Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) The Antarctic Transantarctic Mountains Victoria Land |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de la terre et du cosmos Antarctica Impact cratering Impact ejecta Microtektites Target stratigraphy Volatilization |
spellingShingle |
Sciences de la terre et du cosmos Antarctica Impact cratering Impact ejecta Microtektites Target stratigraphy Volatilization Soens, Bastien Van Ginneken, Matthias Chernonozhkin, Stepan S.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 |
Sciences de la terre et du cosmos Antarctica Impact cratering Impact ejecta Microtektites Target stratigraphy Volatilization |
description |
The ~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 Sør 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 μm, with an average diameter of ~370 μm. This compares relatively well with the size distribution (75–778 μm) 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 km) and Larkman Nunatak ... |
format |
Article in Journal/Newspaper |
author |
Soens, Bastien Van Ginneken, Matthias Chernonozhkin, Stepan S.M. Slotte, Nicolas Debaille, Vinciane Vanhaecke, Frank Terryn, Herman Claeys, Philippe Goderis, Steven |
author_facet |
Soens, Bastien Van Ginneken, Matthias Chernonozhkin, Stepan S.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 |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/321121 https://dipot.ulb.ac.be/dspace/bitstream/2013/321121/1/doi_304765.pdf |
long_lat |
ENVELOPE(179.383,179.383,-85.767,-85.767) ENVELOPE(25.000,25.000,-72.000,-72.000) |
geographic |
Antarctic East Antarctica Larkman Nunatak Sør-Rondane The Antarctic Transantarctic Mountains Victoria Land |
geographic_facet |
Antarctic East Antarctica Larkman Nunatak Sør-Rondane The Antarctic Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
op_source |
Geoscience Frontiers, 12 (4 |
op_relation |
uri/info:doi/10.1016/j.gsf.2021.101153 uri/info:pii/S1674987121000177 uri/info:scp/85101184016 https://dipot.ulb.ac.be/dspace/bitstream/2013/321121/1/doi_304765.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/321121 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1766260861234577408 |