Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica)
Abstract Upon passage through Earth's atmosphere, micrometeorites undergo variable degrees of melting and evaporation. Among the various textural and chemical groups recognized among cosmic spherules, that is, melted micrometeorites, a subset of particles may indicate anomalously high degrees o...
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Online Access: | http://dx.doi.org/10.1111/maps.14188 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.14188 |
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crwiley:10.1111/maps.14188 2024-10-13T14:01:59+00:00 Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) Boonants, Tom Goderis, Steven Soens, Bastien Van Maldeghem, Flore Chernonozhkin, Stepan M. Vanhaecke, Frank van Ginneken, Matthias Snoeck, Christophe Claeys, Philippe Fonds Wetenschappelijk Onderzoek Vrije Universiteit Brussel Belgian Federal Science Policy Office 2024 http://dx.doi.org/10.1111/maps.14188 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.14188 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 59, issue 9, page 2213-2240 ISSN 1086-9379 1945-5100 journal-article 2024 crwiley https://doi.org/10.1111/maps.14188 2024-09-17T04:45:22Z Abstract Upon passage through Earth's atmosphere, micrometeorites undergo variable degrees of melting and evaporation. Among the various textural and chemical groups recognized among cosmic spherules, that is, melted micrometeorites, a subset of particles may indicate anomalously high degrees of vaporization based on their chemical and isotopic properties. Here, a selection of such refractory element‐enriched cosmic spherules from Widerøefjellet (Sør Rondane Mountains, East Antarctica) is characterized for their petrographic features, major and trace element concentrations ( N = 35), and oxygen isotopic compositions ( N = 23). Following chemical classification, the highly vaporized particles can be assigned to either the “CAT‐like” or the “High Ca‐Al” cosmic spherule groups. However, through the combination of major and trace element concentrations and oxygen isotopic data, a larger diversity of processes and precursor materials are identified that lead to the final compositions of refractory element‐enriched particles. These include fragmentation, disproportional sampling of specific mineral constituents, differential melting, metal bead extraction, redox shifts, and evaporation. Based on specific element concentrations (e.g., Sc, Zr, Eu, Tm) and ratios (e.g., Fe/Mg, CaO + Al 2 O 3 /Sc + Y + Zr + Hf), and variations of O isotope compositions, “CAT‐like” and “High Ca‐Al” cosmic spherules likely represent a continuum between mineral endmembers from both primitive and differentiated parent bodies that experienced variable degrees of evaporation. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Wiley Online Library East Antarctica Sør Rondane Mountains ENVELOPE(25.000,25.000,-72.000,-72.000) Sør-Rondane ENVELOPE(25.000,25.000,-72.000,-72.000) Widerøefjellet ENVELOPE(23.259,23.259,-72.150,-72.150) Meteoritics & Planetary Science |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Upon passage through Earth's atmosphere, micrometeorites undergo variable degrees of melting and evaporation. Among the various textural and chemical groups recognized among cosmic spherules, that is, melted micrometeorites, a subset of particles may indicate anomalously high degrees of vaporization based on their chemical and isotopic properties. Here, a selection of such refractory element‐enriched cosmic spherules from Widerøefjellet (Sør Rondane Mountains, East Antarctica) is characterized for their petrographic features, major and trace element concentrations ( N = 35), and oxygen isotopic compositions ( N = 23). Following chemical classification, the highly vaporized particles can be assigned to either the “CAT‐like” or the “High Ca‐Al” cosmic spherule groups. However, through the combination of major and trace element concentrations and oxygen isotopic data, a larger diversity of processes and precursor materials are identified that lead to the final compositions of refractory element‐enriched particles. These include fragmentation, disproportional sampling of specific mineral constituents, differential melting, metal bead extraction, redox shifts, and evaporation. Based on specific element concentrations (e.g., Sc, Zr, Eu, Tm) and ratios (e.g., Fe/Mg, CaO + Al 2 O 3 /Sc + Y + Zr + Hf), and variations of O isotope compositions, “CAT‐like” and “High Ca‐Al” cosmic spherules likely represent a continuum between mineral endmembers from both primitive and differentiated parent bodies that experienced variable degrees of evaporation. |
author2 |
Fonds Wetenschappelijk Onderzoek Vrije Universiteit Brussel Belgian Federal Science Policy Office |
format |
Article in Journal/Newspaper |
author |
Boonants, Tom Goderis, Steven Soens, Bastien Van Maldeghem, Flore Chernonozhkin, Stepan M. Vanhaecke, Frank van Ginneken, Matthias Snoeck, Christophe Claeys, Philippe |
spellingShingle |
Boonants, Tom Goderis, Steven Soens, Bastien Van Maldeghem, Flore Chernonozhkin, Stepan M. Vanhaecke, Frank van Ginneken, Matthias Snoeck, Christophe Claeys, Philippe Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
author_facet |
Boonants, Tom Goderis, Steven Soens, Bastien Van Maldeghem, Flore Chernonozhkin, Stepan M. Vanhaecke, Frank van Ginneken, Matthias Snoeck, Christophe Claeys, Philippe |
author_sort |
Boonants, Tom |
title |
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
title_short |
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
title_full |
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
title_fullStr |
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
title_full_unstemmed |
Elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from Widerøefjellet, Sør Rondane Mountains (East Antarctica) |
title_sort |
elemental and oxygen isotopic fractionation recorded in highly vaporized cosmic spherules from widerøefjellet, sør rondane mountains (east antarctica) |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/maps.14188 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.14188 |
long_lat |
ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(25.000,25.000,-72.000,-72.000) ENVELOPE(23.259,23.259,-72.150,-72.150) |
geographic |
East Antarctica Sør Rondane Mountains Sør-Rondane Widerøefjellet |
geographic_facet |
East Antarctica Sør Rondane Mountains Sør-Rondane Widerøefjellet |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Meteoritics & Planetary Science volume 59, issue 9, page 2213-2240 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/maps.14188 |
container_title |
Meteoritics & Planetary Science |
_version_ |
1812814094478082048 |