Abstract
Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous alteration. Isotopic anomalies could have also been affected by delivery of exogenous clasts and aqueous mobilization of soluble elements. Here, we show that isotopic anomalies for mildly soluble Cr are highly variable in Ryugu and CI chondrites, whereas those of Ti are relatively uniform. This variation in Cr isotope ratios is most likely due to physicochemical fractionation between 54Cr-rich presolar nanoparticles and Cr-bearing secondary minerals at the millimeter-scale in the bulk samples, likely due to extensive aqueous alteration in their parent bodies that occurred 5:2þ11::84 Ma after Solar System birth. In contrast, Ti isotopes were marginally affected by this process. Our results show that isotopic heterogeneities in asteroids are not all nebular or accretionary in nature but can also reflect element redistribution by water.
Original language | English |
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Article number | eadi7048 |
Journal | Science Advances |
Volume | 9 |
Issue number | 45 |
Number of pages | 11 |
ISSN | 2375-2548 |
DOIs | |
Publication status | Published - 2023 |
Bibliographical note
Publisher Copyright:© 2023 American Association for the Advancement of Science. All rights reserved.
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Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample. / Yokoyama, Tetsuya; Wadhwa, Meenakshi; Iizuka, Tsuyoshi; Rai, Vinai; Gautam, Ikshu; Hibiya, Yuki; Masuda, Yuki; Haba, Makiko K.; Fukai, Ryota; Hines, Rebekah; Phelan, Nicole; Abe, Yoshinari; Aléon, Jérôme; Alexander, Conel M. O'D.; Amari, Sachiko; Amelin, Yuri; Bajo, Ken-ichi; Bizzarro, Martin; Bouvier, Audrey; Carlson, Richard W.; Chaussidon, Marc; Choi, Byeon-Gak; Dauphas, Nicolas; Davis, Andrew M.; Rocco, Tommaso Di; Fujiya, Wataru; Hidaka, Hiroshi; Homma, Hisashi; Hoppe, Peter; Huss, Gary R.; Ichida, Kiyohiro; Ireland, Trevor; Ishikawa, Akira; Itoh, Shoichi; Kawasaki, Noriyuki; Kita, Noriko T.; Kitajima, Koki; Kleine, Thorsten; Komatani, Shintaro; Krot, Alexander N.; Liu, Ming-Chang; McKeegan, Kevin D.; Morita, Mayu; Motomura, Kazuko; Moynier, Frédéric; Nakai, Izumi; Nagashima, Kazuhide; Nguyen, Ann; Nittler, Larry; Onose, Morihiko; Pack, Andreas; Park, Changkun; Piani, Laurette; Qin, Liping; Russell, Sara; Sakamoto, Naoya; Schönbächler, Maria; Tafla, Lauren; Tang, Haolan; Terada, Kentaro; Terada, Yasuko; Usui, Tomohiro; Wada, Sohei; Walker, Richard J.; Yamashita, Katsuyuki; Yin, Qing-Zhu; Yoneda, Shigekazu; Young, Edward D.; Yui, Hiroharu; Zhang, Ai-Cheng; Nakamura, Tomoki; Naraoka, Hiroshi; Noguchi, Takaaki; Okazaki, Ryuji; Sakamoto, Kanako; Yabuta, Hikaru; Abe, Masanao; Miyazaki, Akiko; Nakato, Aiko; Nishimura, Masahiro; Okada, Tatsuaki; Yada, Toru; Yogata, Kasumi; Nakazawa, Satoru; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Tsuda, Yuichi; Watanabe, Sei-ichiro; Yoshikawa, Makoto; Tachibana, Shogo; Yurimoto, Hisayoshi.
In: Science Advances, Vol. 9, No. 45, eadi7048, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
}
TY - JOUR
T1 - Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample
AU - Yokoyama, Tetsuya
AU - Wadhwa, Meenakshi
AU - Iizuka, Tsuyoshi
AU - Rai, Vinai
AU - Gautam, Ikshu
AU - Hibiya, Yuki
AU - Masuda, Yuki
AU - Haba, Makiko K.
AU - Fukai, Ryota
AU - Hines, Rebekah
AU - Phelan, Nicole
AU - Abe, Yoshinari
AU - Aléon, Jérôme
AU - Alexander, Conel M. O'D.
AU - Amari, Sachiko
AU - Amelin, Yuri
AU - Bajo, Ken-ichi
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 - Rocco, Tommaso Di
AU - Fujiya, Wataru
AU - Hidaka, Hiroshi
AU - Homma, Hisashi
AU - Hoppe, Peter
AU - Huss, Gary R.
AU - Ichida, Kiyohiro
AU - Ireland, Trevor
AU - Ishikawa, Akira
AU - Itoh, Shoichi
AU - Kawasaki, Noriyuki
AU - Kita, Noriko T.
AU - Kitajima, Koki
AU - Kleine, Thorsten
AU - Komatani, Shintaro
AU - Krot, Alexander N.
AU - Liu, Ming-Chang
AU - McKeegan, Kevin D.
AU - Morita, Mayu
AU - Motomura, Kazuko
AU - Moynier, Frédéric
AU - Nakai, Izumi
AU - Nagashima, Kazuhide
AU - Nguyen, Ann
AU - Nittler, Larry
AU - Onose, Morihiko
AU - Pack, Andreas
AU - Park, Changkun
AU - Piani, Laurette
AU - Qin, Liping
AU - Russell, Sara
AU - Sakamoto, Naoya
AU - Schönbächler, Maria
AU - Tafla, Lauren
AU - Tang, Haolan
AU - Terada, Kentaro
AU - Terada, Yasuko
AU - Usui, Tomohiro
AU - Wada, Sohei
AU - Walker, Richard J.
AU - Yamashita, Katsuyuki
AU - Yin, Qing-Zhu
AU - Yoneda, Shigekazu
AU - Young, Edward D.
AU - Yui, Hiroharu
AU - Zhang, Ai-Cheng
AU - Nakamura, Tomoki
AU - Naraoka, Hiroshi
AU - Noguchi, Takaaki
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
N1 - Publisher Copyright: © 2023 American Association for the Advancement of Science. All rights reserved.
PY - 2023
Y1 - 2023
N2 - Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous alteration. Isotopic anomalies could have also been affected by delivery of exogenous clasts and aqueous mobilization of soluble elements. Here, we show that isotopic anomalies for mildly soluble Cr are highly variable in Ryugu and CI chondrites, whereas those of Ti are relatively uniform. This variation in Cr isotope ratios is most likely due to physicochemical fractionation between 54Cr-rich presolar nanoparticles and Cr-bearing secondary minerals at the millimeter-scale in the bulk samples, likely due to extensive aqueous alteration in their parent bodies that occurred 5:2þ11::84 Ma after Solar System birth. In contrast, Ti isotopes were marginally affected by this process. Our results show that isotopic heterogeneities in asteroids are not all nebular or accretionary in nature but can also reflect element redistribution by water.
AB - Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous alteration. Isotopic anomalies could have also been affected by delivery of exogenous clasts and aqueous mobilization of soluble elements. Here, we show that isotopic anomalies for mildly soluble Cr are highly variable in Ryugu and CI chondrites, whereas those of Ti are relatively uniform. This variation in Cr isotope ratios is most likely due to physicochemical fractionation between 54Cr-rich presolar nanoparticles and Cr-bearing secondary minerals at the millimeter-scale in the bulk samples, likely due to extensive aqueous alteration in their parent bodies that occurred 5:2þ11::84 Ma after Solar System birth. In contrast, Ti isotopes were marginally affected by this process. Our results show that isotopic heterogeneities in asteroids are not all nebular or accretionary in nature but can also reflect element redistribution by water.
U2 - 10.1126/sciadv.adi7048
DO - 10.1126/sciadv.adi7048
M3 - Journal article
C2 - 37939187
AN - SCOPUS:85181047049
VL - 9
JO - Science advances
JF - Science advances
SN - 2375-2548
IS - 45
M1 - eadi7048
ER -