X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites
Abstract Giant micrometeorites (MMs; 400–2000 µm) are exceedingly rare and scientifically valuable. Three‐dimensional nondestructive characterization by X‐ray computed tomography (X‐CT) provides information on the petrography and thus petrogenesis of MMs and serves as a guide to maximize subsequent...
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crwiley:10.1111/maps.13533 2024-09-09T19:07:43+00:00 X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites Dionnet, Zelia Suttle, Martin D. Longobardo, Andrea Rotundi, Alessandra Folco, Luigi Della Corte, Vincenzo King, Andrew Agenzia Spaziale Italiana Science and Technology Facilities Council 2020 http://dx.doi.org/10.1111/maps.13533 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.13533 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13533 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13533 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 55, issue 7, page 1581-1599 ISSN 1086-9379 1945-5100 journal-article 2020 crwiley https://doi.org/10.1111/maps.13533 2024-07-11T04:37:06Z Abstract Giant micrometeorites (MMs; 400–2000 µm) are exceedingly rare and scientifically valuable. Three‐dimensional nondestructive characterization by X‐ray computed tomography (X‐CT) provides information on the petrography and thus petrogenesis of MMs and serves as a guide to maximize subsequent multi‐analytical studies on such precious planetary materials. Here, we discuss the results obtained by X‐CT on 22 giant MMs and the classification based on their 3‐D density contrast images. Scoriaceous and unmelted MMs have distinct porosity ranges (10–40 vol% versus 0–25 vol%, respectively). We observe a porosity variation inside scoriaceous MMs, which allows their atmospheric entry flight history to be resolved. For the first time, spinning entry is explicitly demonstrated for four partially melted MMs. Furthermore, we are able to resolve the thermal gradient in a single particle, based on porosity variation (seen as a progressive increase in pore abundance and size with higher peak temperatures). Moreover, we explore parent body alteration through the 3‐D analysis of pores distribution, showing that shock fabrics are either absent or weakly developed in our data set. Finally, owing to the detection of pseudomorphic chondrules, we estimate that the intensively aqueously altered C1 or CI‐like material could represent 18% of the MM flux at this size fraction (400–1000 µm). Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Antarctic Meteoritics & Planetary Science 55 7 1581 1599 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Giant micrometeorites (MMs; 400–2000 µm) are exceedingly rare and scientifically valuable. Three‐dimensional nondestructive characterization by X‐ray computed tomography (X‐CT) provides information on the petrography and thus petrogenesis of MMs and serves as a guide to maximize subsequent multi‐analytical studies on such precious planetary materials. Here, we discuss the results obtained by X‐CT on 22 giant MMs and the classification based on their 3‐D density contrast images. Scoriaceous and unmelted MMs have distinct porosity ranges (10–40 vol% versus 0–25 vol%, respectively). We observe a porosity variation inside scoriaceous MMs, which allows their atmospheric entry flight history to be resolved. For the first time, spinning entry is explicitly demonstrated for four partially melted MMs. Furthermore, we are able to resolve the thermal gradient in a single particle, based on porosity variation (seen as a progressive increase in pore abundance and size with higher peak temperatures). Moreover, we explore parent body alteration through the 3‐D analysis of pores distribution, showing that shock fabrics are either absent or weakly developed in our data set. Finally, owing to the detection of pseudomorphic chondrules, we estimate that the intensively aqueously altered C1 or CI‐like material could represent 18% of the MM flux at this size fraction (400–1000 µm). |
author2 |
Agenzia Spaziale Italiana Science and Technology Facilities Council |
format |
Article in Journal/Newspaper |
author |
Dionnet, Zelia Suttle, Martin D. Longobardo, Andrea Rotundi, Alessandra Folco, Luigi Della Corte, Vincenzo King, Andrew |
spellingShingle |
Dionnet, Zelia Suttle, Martin D. Longobardo, Andrea Rotundi, Alessandra Folco, Luigi Della Corte, Vincenzo King, Andrew X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
author_facet |
Dionnet, Zelia Suttle, Martin D. Longobardo, Andrea Rotundi, Alessandra Folco, Luigi Della Corte, Vincenzo King, Andrew |
author_sort |
Dionnet, Zelia |
title |
X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
title_short |
X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
title_full |
X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
title_fullStr |
X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
title_full_unstemmed |
X‐ray computed tomography: Morphological and porosity characterization of giant Antarctic micrometeorites |
title_sort |
x‐ray computed tomography: morphological and porosity characterization of giant antarctic micrometeorites |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/maps.13533 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.13533 https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13533 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13533 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science volume 55, issue 7, page 1581-1599 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/maps.13533 |
container_title |
Meteoritics & Planetary Science |
container_volume |
55 |
container_issue |
7 |
container_start_page |
1581 |
op_container_end_page |
1599 |
_version_ |
1809821932913164288 |