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Reconciling fast and slow cooling during planetary formation as recorded in the main group pallasites

Reconciling fast and slow cooling during planetary formation as recorded in the main group pallasites

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.epsl.2023.118284. This is version 3 of this Preprint.

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Authors

Maeve Elizabeth Murphy Quinlan, Andrew Walker , Chris Davies 

Abstract

Pallasite meteorites contain evidence for vastly different cooling timescales: rapid cooling at high temperatures (K/yrs) and slow cooling at lower temperatures (K/Myrs). Pallasite olivine also shows contrasting textures ranging from well-rounded to angular and fragmental, and some samples record chemical zoning. Previous pallasite formation models have required fortuitous changes to the parent body in order to explain these contrasting timescales and textures, including late addition of a megaregolith layer, impact excavation, or parent body break-up and recombination. We investigate the timescales recorded in Main Group Pallasite meteorites...  more

DOI

https://doi.org/10.31223/X59W86

Subjects

Cosmochemistry, Other Planetary Sciences, Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences

Keywords

meteorites, Pallasite, meteorite parent bodies, early Solar System, numerical modelling, meteorite cooling rates

Dates

Published: 2023-03-31 17:38

Last Updated: 2023-07-13 01:27

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License

CC BY Attribution 4.0 International