The most primitive CM chondrites, Asuka 12085, 12169, and 12236, of subtypes 3.0–2.8: Their characteristic features and classification

• Published in: Polar Science
• Main Authors: Kimura, M., Imae, N., Komatsu, M., Barrat, J. A., Greenwood, R. C., Yamaguchi, A., Noguchi, T.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier 2020
• Subjects: Ryugu; Polar Science
• Online Access: https://oro.open.ac.uk/71676/; https://oro.open.ac.uk/71676/1/71676.pdf; https://doi.org/10.1016/j.polar.2020.100565

CM chondrites (CMs) are the most abundant group of carbonaceous chondrites. CMs experienced varying degrees of secondary aqueous alteration and heating that modified or destroyed their primitive features. We have studied three chondrites, Asuka (A) 12085, A 12169, and A 12236. Their modal compositio...