R5: Extraterrestrial materials

[R5-06] Mineralogical investigation of multiple lithologies in the Hayabusa2 returned sample C0002 grain using SEM, TEM, and X-ray nanoCT

*Megumi Matsumoto¹, Junya Matsuno², Akira Tsuchiyama^2,3, Tomoki Nakamura¹, Takashi Mikouchi⁴, Masahiro Yasutake⁵, Kentaro Uesugi⁵, Akihisa Takeuchi⁵, Satomi Enju⁶, Shota Okumura⁸, Itaru Mitsukawa⁸, Sun Mingqi³, Yuma Enokido¹, Akira Miyake⁸, Hisayoshi Yurimoto⁷ (1. Tohoku Univ. , 2. Ritsumeikan Univ., 3. GIG, CAS, 4. Univ. Tokyo, 5. SPring-8, JASRI, 6. Ehime Univ. , 7. Hokkaido Univ., 8. Kyoto univ.)

Keywords:asteroid (162173) Ryugu, aqueous alteration, CI chondrite, X-ray CT, TEM

In this study, we performed SEM, TEM, and X-ray nanoCT analyses on various lithologies in the Hayabusa2 returned sample C0002 grain. We will present mineralogical characteristics of the Ryugu lithologies and discuss formation histories of them.