Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits
Each year, approximately 5000 tons of extraterrestrial material reaches the Earth's surface as micrometeorites, cosmic dust particles ranging from 10 to 2000 μm in size. These micrometeorites, collected from diverse environments, mainly deep-sea sediments, Antarctic ice, snow and loose sediment...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://hdl.handle.net/11568/1245747 https://doi.org/10.1016/j.epsl.2024.118837 |
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ftunivpisairis:oai:arpi.unipi.it:11568/1245747 2024-09-15T17:41:38+00:00 Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits Flore Van Maldeghem Ryoga Maeda Bastien Soens Martin D. Suttle Lisa Krämer Ruggiu Carole Cordier Akira Yamaguchi Birger Schmitz Philippe Claeys Luigi Folco Steven Goderis Van Maldeghem, Flore Maeda, Ryoga Soens, Bastien Suttle, Martin D. Krämer Ruggiu, Lisa Cordier, Carole Yamaguchi, Akira Schmitz, Birger Claeys, Philippe Folco, Luigi Goderis, Steven 2024 https://hdl.handle.net/11568/1245747 https://doi.org/10.1016/j.epsl.2024.118837 unknown volume:641 journal:EARTH AND PLANETARY SCIENCE LETTERS https://hdl.handle.net/11568/1245747 doi:10.1016/j.epsl.2024.118837 info:eu-repo/semantics/article 2024 ftunivpisairis https://doi.org/10.1016/j.epsl.2024.118837 2024-08-27T07:07:45Z Each year, approximately 5000 tons of extraterrestrial material reaches the Earth's surface as micrometeorites, cosmic dust particles ranging from 10 to 2000 μm in size. These micrometeorites, collected from diverse environments, mainly deep-sea sediments, Antarctic ice, snow and loose sediments, and hot deserts, are crucial in understanding our Solar System's evolution. Chrome-rich spinel (Cr-spinel) minerals have gained attention as proxies for studying the extraterrestrial flux in sedimentary deposits, because these robust minerals occur, in various extraterrestrial materials, with compositions characteristic of their parent bodies. A total of 27 Cr-spinel bearing micrometeorites within the size range of 185–800 μm, were identified from approximately 6000 micrometeorites from the Transantarctic Mountains (n = 23) and the Sør Rondane Mountains (n = 4), in Antarctica, containing Cr-spinel (8–120 μm), were examined in this study for geochemical composition and high-precision oxygen isotope ratios to assess alteration and identify potential parent bodies. Oxygen isotopes in the micrometeorite groundmass and in Cr-spinel grains reveal a predominance of ordinary chondritic precursors, with only 1 in 10 micrometeorites containing Cr-spinel minerals showing a carbonaceous chondritic signature. This may be further confirmed by an elevated Al content (> 12 wt% Al2O3) in Cr-spinel from specific carbonaceous chondrite types, but a more extensive dataset is required to establish definitive criteria. The first Cr-spinel bearing particle, in an Antarctic micrometeorite, that can be linked to R-chondrites based on oxygen isotopes, has been documented, demonstrating the potential for R-chondrites as a source of chrome-rich spinels. The study also highlights the potential for chemical modifications and alteration processes that Cr-spinel minerals may undergo during their time on the parent body, atmospheric entry, and terrestrial residence. In the context of the broader micrometeorite flux, the results align with previous ... Article in Journal/Newspaper Antarc* Antarctic Antarctica ARPI - Archivio della Ricerca dell'Università di Pisa Earth and Planetary Science Letters 641 118837 |
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Open Polar |
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ARPI - Archivio della Ricerca dell'Università di Pisa |
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ftunivpisairis |
language |
unknown |
description |
Each year, approximately 5000 tons of extraterrestrial material reaches the Earth's surface as micrometeorites, cosmic dust particles ranging from 10 to 2000 μm in size. These micrometeorites, collected from diverse environments, mainly deep-sea sediments, Antarctic ice, snow and loose sediments, and hot deserts, are crucial in understanding our Solar System's evolution. Chrome-rich spinel (Cr-spinel) minerals have gained attention as proxies for studying the extraterrestrial flux in sedimentary deposits, because these robust minerals occur, in various extraterrestrial materials, with compositions characteristic of their parent bodies. A total of 27 Cr-spinel bearing micrometeorites within the size range of 185–800 μm, were identified from approximately 6000 micrometeorites from the Transantarctic Mountains (n = 23) and the Sør Rondane Mountains (n = 4), in Antarctica, containing Cr-spinel (8–120 μm), were examined in this study for geochemical composition and high-precision oxygen isotope ratios to assess alteration and identify potential parent bodies. Oxygen isotopes in the micrometeorite groundmass and in Cr-spinel grains reveal a predominance of ordinary chondritic precursors, with only 1 in 10 micrometeorites containing Cr-spinel minerals showing a carbonaceous chondritic signature. This may be further confirmed by an elevated Al content (> 12 wt% Al2O3) in Cr-spinel from specific carbonaceous chondrite types, but a more extensive dataset is required to establish definitive criteria. The first Cr-spinel bearing particle, in an Antarctic micrometeorite, that can be linked to R-chondrites based on oxygen isotopes, has been documented, demonstrating the potential for R-chondrites as a source of chrome-rich spinels. The study also highlights the potential for chemical modifications and alteration processes that Cr-spinel minerals may undergo during their time on the parent body, atmospheric entry, and terrestrial residence. In the context of the broader micrometeorite flux, the results align with previous ... |
author2 |
Van Maldeghem, Flore Maeda, Ryoga Soens, Bastien Suttle, Martin D. Krämer Ruggiu, Lisa Cordier, Carole Yamaguchi, Akira Schmitz, Birger Claeys, Philippe Folco, Luigi Goderis, Steven |
format |
Article in Journal/Newspaper |
author |
Flore Van Maldeghem Ryoga Maeda Bastien Soens Martin D. Suttle Lisa Krämer Ruggiu Carole Cordier Akira Yamaguchi Birger Schmitz Philippe Claeys Luigi Folco Steven Goderis |
spellingShingle |
Flore Van Maldeghem Ryoga Maeda Bastien Soens Martin D. Suttle Lisa Krämer Ruggiu Carole Cordier Akira Yamaguchi Birger Schmitz Philippe Claeys Luigi Folco Steven Goderis Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
author_facet |
Flore Van Maldeghem Ryoga Maeda Bastien Soens Martin D. Suttle Lisa Krämer Ruggiu Carole Cordier Akira Yamaguchi Birger Schmitz Philippe Claeys Luigi Folco Steven Goderis |
author_sort |
Flore Van Maldeghem |
title |
Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
title_short |
Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
title_full |
Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
title_fullStr |
Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
title_full_unstemmed |
Chrome-rich spinels in micrometeorites from modern Antarctic sedimentary deposits |
title_sort |
chrome-rich spinels in micrometeorites from modern antarctic sedimentary deposits |
publishDate |
2024 |
url |
https://hdl.handle.net/11568/1245747 https://doi.org/10.1016/j.epsl.2024.118837 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
volume:641 journal:EARTH AND PLANETARY SCIENCE LETTERS https://hdl.handle.net/11568/1245747 doi:10.1016/j.epsl.2024.118837 |
op_doi |
https://doi.org/10.1016/j.epsl.2024.118837 |
container_title |
Earth and Planetary Science Letters |
container_volume |
641 |
container_start_page |
118837 |
_version_ |
1810487862491086848 |