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Your search keyword '"Tsuda, Yuichi"' showing total 2 results
Start Over Author "Tsuda, Yuichi" Publication Year Range This year Journal science advances
2 results on '"Tsuda, Yuichi"'

1. Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid Ryugu

Author

Matsumoto, Megumi, primary, Matsuno, Junya, additional, Tsuchiyama, Akira, additional, Nakamura, Tomoki, additional, Enokido, Yuma, additional, Kikuiri, Mizuha, additional, Nakato, Aiko, additional, Yasutake, Masahiro, additional, Uesugi, Kentaro, additional, Takeuchi, Akihisa, additional, Enju, Satomi, additional, Okumura, Shota, additional, Mitsukawa, Itaru, additional, Sun, Mingqi, additional, Miyake, Akira, additional, Haruta, Mitsutaka, additional, Igami, Yohei, additional, Yurimoto, Hisayoshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Zolensky, Michael, additional, Yada, Toru, additional, Nishimura, Masahiro, additional, Miyazaki, Akiko, additional, Yogata, Kasumi, additional, Abe, Masanao, additional, Okada, Tatsuaki, additional, Usui, Tomohiro, additional, Yoshikawa, Makoto, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2024
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2. The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites.

Author

Spitzer F, Kleine T, Burkhardt C, Hopp T, Yokoyama T, Abe Y, Aléon J, O'D Alexander CM, Amari S, Amelin Y, Bajo KI, Bizzarro M, Bouvier A, Carlson RW, Chaussidon M, Choi BG, Dauphas N, Davis AM, Di Rocco T, Fujiya W, Fukai R, Gautam I, Haba MK, Hibiya Y, Hidaka H, Homma H, Hoppe P, Huss GR, Ichida K, Iizuka T, Ireland TR, Ishikawa A, Itoh S, Kawasaki N, Kita NT, Kitajima K, Komatani S, Krot AN, Liu MC, Masuda Y, Morita M, Moynier F, Motomura K, Nakai I, Nagashima K, Nguyen A, Nittler L, Onose M, Pack A, Park C, Piani L, Qin L, Russell SS, Sakamoto N, Schönbächler M, Tafla L, Tang H, Terada K, Terada Y, Usui T, Wada S, Wadhwa M, Walker RJ, Yamashita K, Yin QZ, Yoneda S, Young ED, Yui H, Zhang AC, Nakamura T, Naraoka H, Noguchi T, Okazaki R, Sakamoto K, Yabuta H, Abe M, Miyazaki A, Nakato A, Nishimura M, Okada T, Yada T, Yogata K, Nakazawa S, Saiki T, Tanaka S, Terui F, Tsuda Y, Watanabe SI, Yoshikawa M, Tachibana S, and Yurimoto H

Abstract

The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the accretion disk, possibly around the orbits of Uranus and Neptune. We show that, like for Fe, Ryugu and CI chondrites also have indistinguishable Ni isotope anomalies, which differ from those of other carbonaceous chondrites. We propose that this unique Fe and Ni isotopic composition reflects different accretion efficiencies of small FeNi metal grains among the carbonaceous chondrite parent bodies. The CI chondrites incorporated these grains more efficiently, possibly because they formed at the end of the disk's lifetime, when planetesimal formation was also triggered by photoevaporation of the disk. Isotopic variations among carbonaceous chondrites may thus reflect fractionation of distinct dust components from a common reservoir, implying CI chondrites/Ryugu may have formed in the same region of the accretion disk as other carbonaceous chondrites.

Published
2024
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