Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

Laurette Piani; Kazuhide Nagashima; Noriyuki Kawasaki; Naoya Sakamoto; Ken Ichi Bajo; Yoshinari Abe; Jérôme Aléon; Conel M. Conel; Sachiko Amari; Yuri Amelin; Martin Bizzarro; Audrey Bouvier; Richard W. Carlson; Marc Chaussidon; Byeon Gak Choi; Nicolas Dauphas; Andrew M. Davis; Tommaso Di Rocco; Wataru Fujiya; Ryota Fukai; Ikshu Gautam; Makiko K. Haba; Yuki Hibiya; Hiroshi Hidaka; Hisashi Homma; Peter Hoppe; Gary R. Huss; Kiyohiro Ichida; Tsuyoshi Iizuka; Trevor R. Ireland; Akira Ishikawa; Shoichi Itoh; Noriko T. Kita; Kouki Kitajima; Thorsten Kleine; Shintaro Komatani; Alexander N. Krot; Ming Chang Liu; Yuki Masuda; Kevin D. McKeegan; Mayu Morita; Kazuko Motomura; Frédéric Moynier; Izumi Nakai; Ann Nguyen; Larry Nittler; Morihiko Onose; Andreas Pack; Changkun Park; Liping Qin; Sara S. Russell; Maria Schönbächler; Lauren Tafla; Haolan Tang; Kentaro Terada; Yasuko Terada; Tomohiro Usui; Sohei Wada; Meenakshi Wadhwa; Richard J. Walker; Katsuyuki Yamashita; Qing Zhu Yin; Tetsuya Yokoyama; Shigekazu Yoneda; Edward D. Young; Hiroharu Yui; Ai Cheng Zhang; Tomoki Nakamura; Hiroshi Naraoka; Ryuji Okazaki; Kanako Sakamoto; Hikaru Yabuta; Masanao Abe; Akiko Miyazaki; Aiko Nakato; Masahiro Nishimura; Tatsuaki Okada; Toru Yada; Kasumi Yogata; Satoru Nakazawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Yuichi Tsuda; Sei Ichiro Watanabe; Makoto Yoshikawa; Shogo Tachibana; Hisayoshi Yurimoto

doi:10.3847/2041-8213/acc393

Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken Ichi Bajo, Yoshinari Abe, Jérôme Aléon, Conel M. Conel, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota FukaiIkshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei Ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu’s hydrous minerals, D/H_Ryugu, to be [165 ± 19] × 10⁻⁶, which corresponds to δD_Ryugu = +59 ± 121‰ (2σ). The hydrous mineral D/H_Ryugu’s values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu’s samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth’s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu’s rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H₂ before being accreted on the Ryugu’s parent asteroid.

Original language	English (US)
Article number	L43
Journal	Astrophysical Journal Letters
Volume	946
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/acc393
State	Published - Apr 1 2023

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Piani, L., Nagashima, K., Kawasaki, N., Sakamoto, N., Bajo, K. I., Abe, Y., Aléon, J., Conel, C. M., Amari, S., Amelin, Y., Bizzarro, M., Bouvier, A., Carlson, R. W., Chaussidon, M., Choi, B. G., Dauphas, N., Davis, A. M., Di Rocco, T., Fujiya, W., ... Yurimoto, H. (2023). Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu. Astrophysical Journal Letters, 946(2), Article L43. https://doi.org/10.3847/2041-8213/acc393

Piani, L, Nagashima, K, Kawasaki, N, Sakamoto, N, Bajo, KI, Abe, Y, Aléon, J, Conel, CM, 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, 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, Qin, L, Russell, SS, Schönbächler, M, Tafla, L, Tang, H, Terada, K, Terada, Y, Usui, T, Wada, S, 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 2023, 'Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu', Astrophysical Journal Letters, vol. 946, no. 2, L43. https://doi.org/10.3847/2041-8213/acc393

@article{c519496dacea44c9a4c97c6ac3122d17,

title = "Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu",

abstract = "Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu{\textquoteright}s hydrous minerals, D/HRyugu, to be [165 ± 19] × 10−6, which corresponds to δDRyugu = +59 ± 121‰ (2σ). The hydrous mineral D/HRyugu{\textquoteright}s values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu{\textquoteright}s samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth{\textquoteright}s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu{\textquoteright}s rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H2 before being accreted on the Ryugu{\textquoteright}s parent asteroid.",

author = "Laurette Piani and Kazuhide Nagashima and Noriyuki Kawasaki and Naoya Sakamoto and Bajo, {Ken Ichi} and Yoshinari Abe and J{\'e}r{\^o}me Al{\'e}on and Conel, {Conel M.} and Sachiko Amari and Yuri Amelin and Martin Bizzarro and Audrey Bouvier and Carlson, {Richard W.} and Marc Chaussidon and Choi, {Byeon Gak} and Nicolas Dauphas and Davis, {Andrew M.} and {Di Rocco}, Tommaso and Wataru Fujiya and Ryota Fukai and Ikshu Gautam and Haba, {Makiko K.} and Yuki Hibiya and Hiroshi Hidaka and Hisashi Homma and Peter Hoppe and Huss, {Gary R.} and Kiyohiro Ichida and Tsuyoshi Iizuka and Ireland, {Trevor R.} and Akira Ishikawa and Shoichi Itoh and Kita, {Noriko T.} and Kouki Kitajima and Thorsten Kleine and Shintaro Komatani and Krot, {Alexander N.} and Liu, {Ming Chang} and Yuki Masuda and McKeegan, {Kevin D.} and Mayu Morita and Kazuko Motomura and Fr{\'e}d{\'e}ric Moynier and Izumi Nakai and Ann Nguyen and Larry Nittler and Morihiko Onose and Andreas Pack and Changkun Park and Liping Qin and Russell, {Sara S.} and Maria Sch{\"o}nb{\"a}chler and Lauren Tafla and Haolan Tang and Kentaro Terada and Yasuko Terada and Tomohiro Usui and Sohei Wada and Meenakshi Wadhwa and Walker, {Richard J.} and Katsuyuki Yamashita and Yin, {Qing Zhu} and Tetsuya Yokoyama and Shigekazu Yoneda and Young, {Edward D.} and Hiroharu Yui and Zhang, {Ai Cheng} and Tomoki Nakamura and Hiroshi Naraoka and Ryuji Okazaki and Kanako Sakamoto and Hikaru Yabuta and Masanao Abe and Akiko Miyazaki and Aiko Nakato and Masahiro Nishimura and Tatsuaki Okada and Toru Yada and Kasumi Yogata and Satoru Nakazawa and Takanao Saiki and Satoshi Tanaka and Fuyuto Terui and Yuichi Tsuda and Watanabe, {Sei Ichiro} and Makoto Yoshikawa and Shogo Tachibana and Hisayoshi Yurimoto",

note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = apr,

day = "1",

doi = "10.3847/2041-8213/acc393",

language = "English (US)",

volume = "946",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "2",

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TY - JOUR

T1 - Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

AU - Piani, Laurette

AU - Nagashima, Kazuhide

AU - Kawasaki, Noriyuki

AU - Sakamoto, Naoya

AU - Bajo, Ken Ichi

AU - Abe, Yoshinari

AU - Aléon, Jérôme

AU - Conel, Conel M.

AU - Amari, Sachiko

AU - Amelin, Yuri

AU - Bizzarro, Martin

AU - Bouvier, Audrey

AU - Carlson, Richard W.

AU - Chaussidon, Marc

AU - Choi, Byeon Gak

AU - Dauphas, Nicolas

AU - Davis, Andrew M.

AU - Di Rocco, Tommaso

AU - Fujiya, Wataru

AU - Fukai, Ryota

AU - Gautam, Ikshu

AU - Haba, Makiko K.

AU - Hibiya, Yuki

AU - Hidaka, Hiroshi

AU - Homma, Hisashi

AU - Hoppe, Peter

AU - Huss, Gary R.

AU - Ichida, Kiyohiro

AU - Iizuka, Tsuyoshi

AU - Ireland, Trevor R.

AU - Ishikawa, Akira

AU - Itoh, Shoichi

AU - Kita, Noriko T.

AU - Kitajima, Kouki

AU - Kleine, Thorsten

AU - Komatani, Shintaro

AU - Krot, Alexander N.

AU - Liu, Ming Chang

AU - Masuda, Yuki

AU - McKeegan, Kevin D.

AU - Morita, Mayu

AU - Motomura, Kazuko

AU - Moynier, Frédéric

AU - Nakai, Izumi

AU - Nguyen, Ann

AU - Nittler, Larry

AU - Onose, Morihiko

AU - Pack, Andreas

AU - Park, Changkun

AU - Qin, Liping

AU - Russell, Sara S.

AU - Schönbächler, Maria

AU - Tafla, Lauren

AU - Tang, Haolan

AU - Terada, Kentaro

AU - Terada, Yasuko

AU - Usui, Tomohiro

AU - Wada, Sohei

AU - Wadhwa, Meenakshi

AU - Walker, Richard J.

AU - Yamashita, Katsuyuki

AU - Yin, Qing Zhu

AU - Yokoyama, Tetsuya

AU - Yoneda, Shigekazu

AU - Young, Edward D.

AU - Yui, Hiroharu

AU - Zhang, Ai Cheng

AU - Nakamura, Tomoki

AU - Naraoka, Hiroshi

AU - Okazaki, Ryuji

AU - Sakamoto, Kanako

AU - Yabuta, Hikaru

AU - Abe, Masanao

AU - Miyazaki, Akiko

AU - Nakato, Aiko

AU - Nishimura, Masahiro

AU - Okada, Tatsuaki

AU - Yada, Toru

AU - Yogata, Kasumi

AU - Nakazawa, Satoru

AU - Saiki, Takanao

AU - Tanaka, Satoshi

AU - Terui, Fuyuto

AU - Tsuda, Yuichi

AU - Watanabe, Sei Ichiro

AU - Yoshikawa, Makoto

AU - Tachibana, Shogo

AU - Yurimoto, Hisayoshi

PY - 2023/4/1

Y1 - 2023/4/1

N2 - Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu’s hydrous minerals, D/HRyugu, to be [165 ± 19] × 10−6, which corresponds to δDRyugu = +59 ± 121‰ (2σ). The hydrous mineral D/HRyugu’s values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu’s samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth’s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu’s rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H2 before being accreted on the Ryugu’s parent asteroid.

AB - Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu’s hydrous minerals, D/HRyugu, to be [165 ± 19] × 10−6, which corresponds to δDRyugu = +59 ± 121‰ (2σ). The hydrous mineral D/HRyugu’s values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu’s samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth’s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu’s rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H2 before being accreted on the Ryugu’s parent asteroid.

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DO - 10.3847/2041-8213/acc393

M3 - Article

AN - SCOPUS:85152566952

SN - 2041-8205

VL - 946

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L43

ER -

Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

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