Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2.
In: Science advances, Jg. 8 (2022-12-16), Heft 50, S. eade2067
Online
academicJournal
Zugriff:
The extraterrestrial materials returned from asteroid (162173) Ryugu consist predominantly of low-temperature aqueously formed secondary minerals and are chemically and mineralogically similar to CI (Ivuna-type) carbonaceous chondrites. Here, we show that high-temperature anhydrous primary minerals in Ryugu and CI chondrites exhibit a bimodal distribution of oxygen isotopic compositions: 16 O-rich (associated with refractory inclusions) and 16 O-poor (associated with chondrules). Both the 16 O-rich and 16 O-poor minerals probably formed in the inner solar protoplanetary disk and were subsequently transported outward. The abundance ratios of the 16 O-rich to 16 O-poor minerals in Ryugu and CI chondrites are higher than in other carbonaceous chondrite groups but are similar to that of comet 81P/Wild2, suggesting that Ryugu and CI chondrites accreted in the outer Solar System closer to the accretion region of comets.
| Titel: |
Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2.
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| Autor/in / Beteiligte Person: | Kawasaki, N ; Nagashima, K ; Sakamoto, N ; Matsumoto, T ; Bajo, KI ; Wada, S ; Igami, Y ; Miyake, A ; Noguchi, T ; Yamamoto, D ; Russell, SS ; Abe, Y ; Aléon, J ; Alexander, CMO ; Amari, S ; Amelin, Y ; 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 ; Ito, M ; Itoh, S ; Kita, NT ; Kitajima, K ; Kleine, T ; Komatani, S ; Krot, AN ; Liu, MC ; Masuda, Y ; McKeegan, KD ; Morita, M ; Motomura, K ; Moynier, F ; Nakai, I ; Nguyen, A ; Nittler, L ; Onose, M ; Pack, A ; Park, C ; Piani, L ; Qin, L ; Schönbächler, M ; Tafla, L ; Tang, H ; Terada, K ; Terada, Y ; Usui, T ; Wadhwa, M ; Walker, RJ ; Yamashita, K ; Yin, QZ ; Yokoyama, T ; Yoneda, S ; Young, ED ; Yui, H ; Zhang, AC ; Nakamura, T ; Naraoka, H ; 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 ; Yurimoto, H |
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| Zeitschrift: | Science advances, Jg. 8 (2022-12-16), Heft 50, S. eade2067 |
| Veröffentlichung: | Washington, DC : American Association for the Advancement of Science, [2015]-, 2022 |
| Medientyp: | academicJournal |
| ISSN: | 2375-2548 (electronic) |
| DOI: | 10.1126/sciadv.ade2067 |
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