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1. Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2.

Author

Noriyuki Kawasaki, Kazuhide Nagashima, Naoya Sakamoto, Toru Matsumoto, Ken-ichi Bajo, Sohei Wada, Yohei Igami, Akira Miyake, Takaaki Noguchi, Daiki Yamamoto, Russell, Sara S., Yoshinari Abe, Aléon, Jérôme, Alexander, Conel M. O'D., Sachiko Amari, Yuri Amelin, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., and Chaussidon, Marc

Subjects
*OLIVINE, *OXYGEN isotopes, *MINERALS, *PROTOPLANETARY disks, *SECONDARY ion mass spectrometry, *COMPLEMENTARY metal oxide semiconductors
Abstract

The article presents a study which showed that high-temperature anhydrous primary minerals in Ryugu and CI chondrites exhibit a bimodal distribution of oxygen isotopic compositions. Topics discussed include bimodal distributions of oxygen (O) isotopic compositions of primary minerals, origin of O-poor primary minerals in Ryugu and Ivuna, and origin of O-rich primary minerals in Ryugu and Ivuna.

Published
2022
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