Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples
Journal
Date Issued
2023
Author(s)
Nakamura, T.
•
Matsumoto, M.
•
Amano, K.
•
Enokido, Y.
•
Zolensky, M. E.
•
Mikouchi, T.
•
Genda, H.
•
Tanaka, S.
•
Zolotov, M. Y.
•
Kurosawa, K.
•
Wakita, S.
•
Chiu, I.
•
Ishizaki, T.
•
Okumura, S.
•
•
Pilorget, C.
•
Potin, S. M.
•
Alasli, A.
•
Anada, S.
•
Araki, Y.
•
Sakatani, N.
•
Hyodo, R.
•
Schultz, C.
•
Sekizawa, O.
•
Sitzman, S. D.
•
Sugiura, K.
•
Sun, M.
•
Dartois, E.
•
De Pauw, E.
•
Dionnet, Z.
•
Djouadi, Z.
•
Falkenberg, G.
•
Nagano, H.
•
Fujita, R.
•
Fukuma, T.
•
Gearba, I. R.
•
Hagiya, K.
•
Hu, M. Y.
•
Kato, T.
•
Kawamura, T.
•
Kimura, M.
•
Kubo, M. K.
•
Langenhorst, F.
•
Nakashima, D.
•
Lantz, C.
•
Lavina, B.
•
Lindner, M.
•
Zhao, J.
•
Vekemans, B.
•
Baklouti, D.
•
Bazi, B.
•
Borondics, F.
•
Nagasawa, S.
•
Nishiyama, G.
•
Takahashi, Y.
•
Nitta, K.
•
Mathurin, J.
•
Matsumoto, T.
•
Mitsukawa, I.
•
Miura, H.
•
Miyake, A.
•
Miyake, Y.
•
Yurimoto, H.
•
Okazaki, R.
•
Yabuta, H.
•
Fujioka, Y.
•
Naraoka, H.
•
Sakamoto, K.
•
Tachibana, S.
•
Connolly, H. C.
•
Lauretta, D. S.
•
Yoshitake, M.
•
Yoshikawa, M.
•
Yoshikawa, K.
•
Yoshihara, K.
•
Yokota, Y.
•
Kikuiri, M.
•
Yogata, K.
•
Yano, H.
•
Yamamoto, Y.
•
Yamamoto, D.
•
Yamada, M.
•
Yamada, T.
•
Yada, T.
•
Wada, K.
•
Usui, T.
•
Tsukizaki, R.
•
Kagawa, E.
•
Terui, F.
•
Takeuchi, H.
•
Takei, Y.
•
Iwamae, A.
•
Soejima, H.
•
Shirai, K.
•
Shimaki, Y.
•
Senshu, H.
•
Sawada, H.
•
Saiki, T.
•
Matsuoka, M.
•
Ozaki, M.
•
Ono, G.
•
Okada, T.
•
Ogawa, N.
•
Ogawa, K.
•
Noguchi, R.
•
Noda, H.
•
Nishimura, M.
•
Namiki, N.
•
Nakazawa, S.
•
Brearley, A. J.
•
Morota, T.
•
Miyazaki, A.
•
Miura, A.
•
Mimasu, Y.
•
Matsumoto, K.
•
Kumagai, K.
•
Kouyama, T.
•
Kikuchi, S.
•
Kawahara, K.
•
Kameda, S.
•
Tsuchiyama, A.
•
Iwata, T.
•
Ishihara, Y.
•
Ishiguro, M.
•
Ikeda, H.
•
Hosoda, S.
•
Honda, R.
•
Honda, C.
•
Hitomi, Y.
•
Hirata, N.
•
Hirata, N.
•
Uesugi, M.
•
Hayashi, T.
•
Hayakawa, M.
•
Hatakeda, K.
•
Furuya, S.
•
Fukai, R.
•
Fujii, A.
•
Cho, Y.
•
Arakawa, M.
•
Abe, M.
•
Watanabe, S.
•
Matsuno, J.
•
Tsuda, Y.
•
Kimura, Y.
•
Sato, M.
•
Milliken, R. E.
•
Tatsumi, E.
•
Sugita, S.
•
Hiroi, T.
•
Kitazato, K.
•
Brownlee, D.
•
Joswiak, D. J.
•
Takahashi, M.
•
Ninomiya, K.
•
Takahashi, T.
•
Osawa, T.
•
Terada, K.
•
Brenker, F. E.
•
Tkalcec, B. J.
•
Vincze, L.
•
Brunetto, R.
•
Aléon-Toppani, A.
•
Chan, Q. H. S.
•
Roskosz, M.
•
Viennet, J. -C.
•
Beck, P.
•
Alp, E. E.
•
Michikami, T.
•
Nagaashi, Y.
•
Tsuji, T.
•
Ino, Y.
•
Martinez, J.
•
Han, J.
•
Dolocan, A.
•
Bodnar, R. J.
•
Tanaka, M.
•
Yoshida, H.
•
Sugiyama, K.
•
King, A. J.
•
Fukushi, K.
•
Suga, H.
•
Yamashita, S.
•
Kawai, T.
•
Inoue, K.
•
Nakato, A.
•
Noguchi, T.
•
Vilas, F.
•
Hendrix, A. R.
•
Jaramillo-Correa, C.
•
Domingue, D. L.
•
Dominguez, G.
•
Gainsforth, Z.
•
Engrand, C.
•
Duprat, J.
•
Russell, S. S.
•
Bonato, E.
•
Ma, C.
•
Kawamoto, T.
•
Wada, T.
•
Watanabe, S.
•
Endo, R.
•
Enju, S.
•
Riu, L.
•
Rubino, S.
•
Tack, P.
•
Takeshita, S.
•
Takeichi, Y.
•
Takeuchi, A.
•
Takigawa, A.
•
Takir, D.
•
Tanigaki, T.
•
Taniguchi, A.
•
Tsukamoto, K.
•
Yagi, T.
•
Yamada, S.
•
Yamamoto, K.
•
Yamashita, Y.
•
Yasutake, M.
•
Uesugi, K.
•
Umegaki, I.
Abstract
Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed 17 Ryugu samples measuring 1 to 8 millimeters. Carbon dioxide–bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu’s parent asteroid formed in the outer Solar System. The samples contain low abundances of materials that formed at high temperatures, such as chondrules and calcium- and aluminum-rich inclusions. The samples are rich in phyllosilicates and carbonates, which formed through aqueous alteration reactions at low temperature, high pH, and water/rock ratios of <1 (by mass). Less altered fragments contain olivine, pyroxene, amorphous silicates, calcite, and phosphide. Numerical simulations, based on the mineralogical and physical properties of the samples, indicate that Ryugu’s parent body formed ~2 million years after the beginning of Solar System formation.
Volume
379
Issue
6634
Start page
abn8671
Issn Identifier
0036-8075
Ads BibCode
2023Sci...379.8671N
Rights
open.access
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