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Title: Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu

Abstract

The abundant phyllosilicate and carbonate minerals characterizing most of the returned particles from asteroid Ryugu suggest a history of extensive aqueous alteration on its parent body, similar to the rare mineralogically altered, but chemically primitive, CI (Ivuna-type) chondrite meteorites. Particle C0009 differs mineralogically from other Ryugu particles examined so far by containing anhydrous silicates at a level of ~0.5 vol%, and thus can help shed light on the unaltered original materials that constituted Ryugu’s protolith. In situ oxygen isotope measurements of the most Mg-rich olivine and pyroxene in C0009 reveal two populations of Δ17O: –25‰ to –15‰ and –8‰ to –3‰. The former and the latter populations correlate well with silicate morphologies similar to those seen in amoeboid olivine aggregates and chondrule phenocrysts, respectively, both of which are abundant in less aqueously altered carbonaceous chondrites. Here, this result also highlights the presence of olivine with Δ17O close to the solar value in either a CI chondrite or an asteroid with CI-chondrite characteristics, and provides strong evidence that amoeboid olivine aggregates and Mg-rich chondrules accreted into Ryugu’s protolith. Our data also raise the possibility that the protoliths of CI and other carbonaceous chondrites incorporated similar anhydrous silicates.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [3];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5];  [3];  [6];  [7];  [8]; ORCiD logo [5]; ORCiD logo [9];  [9]; ORCiD logo [10];  [11]; ORCiD logo [12];  [13];  [13] more »; ORCiD logo [9]; ORCiD logo [9]; ORCiD logo [14];  [9];  [9];  [15];  [16]; ORCiD logo [9];  [9]; ORCiD logo [9];  [9]; ORCiD logo [9]; ORCiD logo [13];  [14] « less
  1. Univ. of California, Los Angeles, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States)
  3. National Institute of Polar Research (NIPR), Tokyo (Japan)
  4. Japan Agency for Marine-Earth Science and Technology, Nankoku, Kochi (Japan)
  5. SPring-8, Japan Synchrotron Radiation Research Institute (JSRRI), Sayo (Japan)
  6. Tokyo Metropolitan University, Hachioji, Tokyo (Japan); Kanagawa Univ., Yokohama, Kanagawa (Japan)
  7. National Institute of Natural Sciences (NINS), Okazaki (Japan). Institute for Molecular Sciences (IMS); High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  8. Open University, Milton Keynes (United Kingdom)
  9. Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa (Japan)
  10. National Institute of Natural Sciences (NINS), Okazaki (Japan). Institute for Molecular Sciences (IMS)
  11. Toyo Corporation, Kariya (Japan)
  12. Osaka Univ. (Japan)
  13. Nagoya Univ. (Japan)
  14. Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa (Japan); Univ. of Tokyo (Japan)
  15. Kanagawa Institute of Technology, Atsugi (Japan)
  16. Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa (Japan); Graduate University for Advanced Studies (SOKENDAI), Hayama (Japan)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Japan Society for the Promotion of Science (JSPS)
OSTI Identifier:
1889532
Report Number(s):
LLNL-JRNL-839113
Journal ID: ISSN 2397-3366; 1059879; TRN: US2309961
Grant/Contract Number:  
AC52-07NA27344; JP18K18795; JP18H04468; JP20H01965; JP18H05479; JP19H01959; JP18K03729; JP21K03652; JP17H06459; JP19K03958; JP18K03830; JP19H01951; KP307
Resource Type:
Accepted Manuscript
Journal Name:
Nature Astronomy
Additional Journal Information:
Journal Volume: 6; Journal Issue: 10; Journal ID: ISSN 2397-3366
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 58 GEOSCIENCES; asteroids; comets; Kuiper belt; early solar system; meteoritics

Citation Formats

Liu, Ming-Chang, McCain, Kaitlyn A., Matsuda, Nozomi, Yamaguchi, Akira, Kimura, Makoto, Tomioka, Naotaka, Ito, Motoo, Uesugi, Masayuki, Imae, Naoya, Shirai, Naoki, Ohigashi, Takuji, Greenwood, Richard C., Uesugi, Kentaro, Nakato, Aiko, Yogata, Kasumi, Yuzawa, Hayato, Kodama, Yu, Hirahara, Kaori, Sakurai, Ikuya, Okada, Ikuo, Karouji, Yuzuru, Nakazawa, Satoru, Okada, Tatsuaki, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Yoshikawa, Makoto, Miyazaki, Akiko, Nishimura, Masahiro, Yada, Toru, Abe, Masanao, Usui, Tomohiro, Watanabe, Sei-ichiro, and Tsuda, Yuichi. Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu. United States: N. p., 2022. Web. doi:10.1038/s41550-022-01762-4.
Liu, Ming-Chang, McCain, Kaitlyn A., Matsuda, Nozomi, Yamaguchi, Akira, Kimura, Makoto, Tomioka, Naotaka, Ito, Motoo, Uesugi, Masayuki, Imae, Naoya, Shirai, Naoki, Ohigashi, Takuji, Greenwood, Richard C., Uesugi, Kentaro, Nakato, Aiko, Yogata, Kasumi, Yuzawa, Hayato, Kodama, Yu, Hirahara, Kaori, Sakurai, Ikuya, Okada, Ikuo, Karouji, Yuzuru, Nakazawa, Satoru, Okada, Tatsuaki, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Yoshikawa, Makoto, Miyazaki, Akiko, Nishimura, Masahiro, Yada, Toru, Abe, Masanao, Usui, Tomohiro, Watanabe, Sei-ichiro, & Tsuda, Yuichi. Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu. United States. https://doi.org/10.1038/s41550-022-01762-4
Liu, Ming-Chang, McCain, Kaitlyn A., Matsuda, Nozomi, Yamaguchi, Akira, Kimura, Makoto, Tomioka, Naotaka, Ito, Motoo, Uesugi, Masayuki, Imae, Naoya, Shirai, Naoki, Ohigashi, Takuji, Greenwood, Richard C., Uesugi, Kentaro, Nakato, Aiko, Yogata, Kasumi, Yuzawa, Hayato, Kodama, Yu, Hirahara, Kaori, Sakurai, Ikuya, Okada, Ikuo, Karouji, Yuzuru, Nakazawa, Satoru, Okada, Tatsuaki, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Yoshikawa, Makoto, Miyazaki, Akiko, Nishimura, Masahiro, Yada, Toru, Abe, Masanao, Usui, Tomohiro, Watanabe, Sei-ichiro, and Tsuda, Yuichi. Thu . "Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu". United States. https://doi.org/10.1038/s41550-022-01762-4. https://www.osti.gov/servlets/purl/1889532.
@article{osti_1889532,
title = {Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu},
author = {Liu, Ming-Chang and McCain, Kaitlyn A. and Matsuda, Nozomi and Yamaguchi, Akira and Kimura, Makoto and Tomioka, Naotaka and Ito, Motoo and Uesugi, Masayuki and Imae, Naoya and Shirai, Naoki and Ohigashi, Takuji and Greenwood, Richard C. and Uesugi, Kentaro and Nakato, Aiko and Yogata, Kasumi and Yuzawa, Hayato and Kodama, Yu and Hirahara, Kaori and Sakurai, Ikuya and Okada, Ikuo and Karouji, Yuzuru and Nakazawa, Satoru and Okada, Tatsuaki and Saiki, Takanao and Tanaka, Satoshi and Terui, Fuyuto and Yoshikawa, Makoto and Miyazaki, Akiko and Nishimura, Masahiro and Yada, Toru and Abe, Masanao and Usui, Tomohiro and Watanabe, Sei-ichiro and Tsuda, Yuichi},
abstractNote = {The abundant phyllosilicate and carbonate minerals characterizing most of the returned particles from asteroid Ryugu suggest a history of extensive aqueous alteration on its parent body, similar to the rare mineralogically altered, but chemically primitive, CI (Ivuna-type) chondrite meteorites. Particle C0009 differs mineralogically from other Ryugu particles examined so far by containing anhydrous silicates at a level of ~0.5 vol%, and thus can help shed light on the unaltered original materials that constituted Ryugu’s protolith. In situ oxygen isotope measurements of the most Mg-rich olivine and pyroxene in C0009 reveal two populations of Δ17O: –25‰ to –15‰ and –8‰ to –3‰. The former and the latter populations correlate well with silicate morphologies similar to those seen in amoeboid olivine aggregates and chondrule phenocrysts, respectively, both of which are abundant in less aqueously altered carbonaceous chondrites. Here, this result also highlights the presence of olivine with Δ17O close to the solar value in either a CI chondrite or an asteroid with CI-chondrite characteristics, and provides strong evidence that amoeboid olivine aggregates and Mg-rich chondrules accreted into Ryugu’s protolith. Our data also raise the possibility that the protoliths of CI and other carbonaceous chondrites incorporated similar anhydrous silicates.},
doi = {10.1038/s41550-022-01762-4},
journal = {Nature Astronomy},
number = 10,
volume = 6,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2022},
month = {Thu Sep 01 00:00:00 EDT 2022}
}

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