Arrival and magnetization of carbonaceous chondrites in the asteroid belt before 4562 million years ago.
Asteroids, comets and Kuiper belt
Early solar system
Meteoritics
Journal
Communications earth & environment
ISSN: 2662-4435
Titre abrégé: Commun Earth Environ
Pays: England
ID NLM: 101772745
Informations de publication
Date de publication:
2020
2020
Historique:
received:
04
06
2020
accepted:
27
10
2020
entrez:
7
12
2020
pubmed:
8
12
2020
medline:
8
12
2020
Statut:
ppublish
Résumé
Meteorite magnetizations can provide rare insight into early Solar System evolution. Such data take on new importance with recognition of the isotopic dichotomy between non-carbonaceous and carbonaceous meteorites, representing distinct inner and outer disk reservoirs, and the likelihood that parent body asteroids were once separated by Jupiter and subsequently mixed. The arrival time of these parent bodies into the main asteroid belt, however, has heretofore been unknown. Herein, we show that weak CV (Vigarano type) and CM (Mighei type) carbonaceous chondrite remanent magnetizations indicate acquisition by the solar wind 4.2 to 4.8 million years after Ca-Al-rich inclusion (CAI) formation at heliocentric distances of ~2-4 AU. These data thus indicate that the CV and CM parent asteroids had arrived near, or within, the orbital range of the present-day asteroid belt from the outer disk isotopic reservoir within the first 5 million years of Solar System history.
Identifiants
pubmed: 33283201
doi: 10.1038/s43247-020-00055-w
pii: 55
pmc: PMC7716897
doi:
Types de publication
Journal Article
Langues
eng
Pagination
54Informations de copyright
© The Author(s) 2020.
Déclaration de conflit d'intérêts
Competing interestsThe authors declare no competing interests.
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