Evidence for impact shock and regolith transportation on CM, CI, and CV chondrite parent asteroids

Michael Zolensky1, Takashi Mikouchi2, Kenji Hagiya3, Kazumasa Ohsumi4,5, Mutsumi Komatsu6, Andrew Cheng7, Loan Le8
Meteoritics & Planetary Science (in Press) Link to Article [https://doi.org/10.1111/maps.13909]
1ARES, NASA Johnson Space Center, Houston, Texas 77058, USA
2University Museum, University of Tokyo, Tokyo 113-0033, Japan
3Graduate School of Life Science, Universtiy of Hyogo, Hyogo 678-1297, Japan
4Japan Synchrotron Radiation Research Institute (JASRI), Hyogo 679-5198, Japan
5Japan and High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan
6The Graduate University for Advanced Studies, SOKENDAI, Kanagawa 240-0193, Japan
7The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA
8Jacobs JETS, Johnson Space Center, Houston, Texas 77058, USA
Published by arrangement with John Wiley & Sons

We explore impact shock processing of the regolith of parent asteroids of carbonaceous chondrites, which has not been considered a major process for hydrous carbonaceous chondrites. We describe shock-produced minerals and features found in brecciated CI, CM, and CV chondrites, including agglutinates, a glassy melt pod, a shock melt vein, and melted sulfides. We also reexamine cognate clasts present in the Vigarano CV3 chondrites which appear to derive from asteroid ponds and exhibit cross-bedded dish structures.

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