Ancient and recent collisions revealed by phosphate minerals in the Chelyabinsk meteorite
Authors
Shorttle, O
Rae, ASP
Williams, H
Tang, G
Publication Date
2022Journal Title
Communications Earth and Environment
ISSN
2662-4435
Publisher
Springer Science and Business Media LLC
Volume
3
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Walton, C., Shorttle, O., Hu, S., Rae, A., Jianglong, J., Černok, A., Williams, H., et al. (2022). Ancient and recent collisions revealed by phosphate minerals in the Chelyabinsk meteorite. Communications Earth and Environment, 3 (1) https://doi.org/10.1038/s43247-022-00373-1
Abstract
<jats:title>Abstract</jats:title><jats:p>The collision history of asteroids is an important archive of inner Solar System evolution. Evidence for these collisions is brought to Earth by meteorites. However, as meteorites often preserve numerous impact-reset mineral ages, interpretation of their collision histories is controversial. Here, we combine analysis of phosphate U-Pb ages and microtextures to interpret the collision history of Chelyabinsk—a highly shocked meteorite. We show that phosphate U-Pb ages correlate with phosphate microtextural state. Pristine phosphate domain U-Pb compositions are generally concordant, whereas fracture-damaged domains universally display discordance. Combining both populations best constrains upper (4473 ± 11 Ma) and lower intercept (−9 ± 55 Ma, i.e., within error of present) U-Pb ages. All phosphate U-Pb ages were completely reset during an ancient high energy collision, whilst fracture-damaged domains experienced further Pb-loss during mild and recent collisional re-heating. Targeting textural sub-populations of phosphate grains permits more robust reconstruction of asteroidal collision histories.</jats:p>
Keywords
Article, /704/445/849, /704/445/848, /704/445/330, /704/445/3928, article
Sponsorship
Natural Environment Research Council (2072939)
NERC (NE/L002507/1)
Identifiers
s43247-022-00373-1, 373
External DOI: https://doi.org/10.1038/s43247-022-00373-1
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334425
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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