Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites
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Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites. / Hu, Yan; Moynier, Frédéric; Dai, Wei; Paquet, Marine; Yokoyama, Tetsuya; 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.; Di Rocco, Tommaso; Fujiya, Wataru; Fukai, Ryota; Gautam, Ikshu; Haba, Makiko K.; Hibiya, Yuki; Hidaka, Hiroshi; Homma, Hisashi; Hoppe, Peter; Huss, Gary R.; Ichida, Kiyohiro; Iizuka, Tsuyoshi; Ireland, Trevor R.; Ishikawa, Akira; Itoh, Shoichi; Kawasaki, Noriyuki; Kita, Noriko T.; Kitajima, Koki; Kleine, Thorsten; Komatani, Shintaro; Krot, Alexander N.; Liu, Ming-Chang; Masuda, Yuki; Morita, Mayu; Motomura, Kazuko; Nakai, Izumi; Nagashima, Kazuhide; Nesvorný, David; Nguyen, Ann; Nittler, Larry; Onose, Morihiko; Pack, Andreas; Park, Changkun; Piani, Laurette; Qin, Liping; Russell, Sara S.; Sakamoto, Naoya; Schönbächler, Maria; Tafla, Lauren; Tang, Haolan; Terada, Kentaro; Terada, Yasuko; Usui, Tomohiro; Wada, Sohei; Wadhwa, Meenakshi; 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: Icarus, Vol. 409, 115884, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites
AU - Hu, Yan
AU - Moynier, Frédéric
AU - Dai, Wei
AU - Paquet, Marine
AU - Yokoyama, Tetsuya
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 - 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 - Kawasaki, Noriyuki
AU - Kita, Noriko T.
AU - Kitajima, Koki
AU - Kleine, Thorsten
AU - Komatani, Shintaro
AU - Krot, Alexander N.
AU - Liu, Ming-Chang
AU - Masuda, Yuki
AU - Morita, Mayu
AU - Motomura, Kazuko
AU - Nakai, Izumi
AU - Nagashima, Kazuhide
AU - Nesvorný, David
AU - Nguyen, Ann
AU - Nittler, Larry
AU - Onose, Morihiko
AU - Pack, Andreas
AU - Park, Changkun
AU - Piani, Laurette
AU - Qin, Liping
AU - Russell, Sara S.
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 - Wadhwa, Meenakshi
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 Elsevier Inc.
PY - 2024
Y1 - 2024
N2 - C-type asteroids are the presumed home to carbonaceous chondrites, some of which contain abundant life-forming volatiles and organics. For the first time, samples from a C-type asteroid (162173 Ryugu) were successfully returned to Earth by JAXA's Hayabusa2 mission. These pristine samples, uncontaminated by the terrestrial environment, allow a direct comparison with carbonaceous chondrites. This study reports the stable K isotopic compositions (expressed as δ41K) of Ryugu samples and seven carbonaceous chondrites to constrain the origin of K isotopic variations in the early Solar System. Three aliquots of Ryugu particles collected at two touchdown sites have identical δ41K values, averaged at −0.194 ± 0.038‰ (2SD). The K isotopic composition of Ryugu falls within the range of δ41K values measured on representative CI chondrites, and together, they define an average δ41K value of −0.185 ± 0.078‰ (2SE), which provides the current best estimate of the K isotopic composition of the bulk Solar System. Samples of CI chondrites with δ41K values that deviate from this range likely reflect terrestrial contaminations or compositional heterogeneities at sampled sizes. In addition to CI chondrites, substantial K isotopic variability is observed in other carbonaceous chondrites and within individual chondritic groups, with δ41K values inversely correlated with K abundances in many cases. These observations indicate widespread fluid activity occurred in chondrite parent bodies, which significantly altered the original K abundances and isotopic compositions of chondrules and matrices established at their accretion.
AB - C-type asteroids are the presumed home to carbonaceous chondrites, some of which contain abundant life-forming volatiles and organics. For the first time, samples from a C-type asteroid (162173 Ryugu) were successfully returned to Earth by JAXA's Hayabusa2 mission. These pristine samples, uncontaminated by the terrestrial environment, allow a direct comparison with carbonaceous chondrites. This study reports the stable K isotopic compositions (expressed as δ41K) of Ryugu samples and seven carbonaceous chondrites to constrain the origin of K isotopic variations in the early Solar System. Three aliquots of Ryugu particles collected at two touchdown sites have identical δ41K values, averaged at −0.194 ± 0.038‰ (2SD). The K isotopic composition of Ryugu falls within the range of δ41K values measured on representative CI chondrites, and together, they define an average δ41K value of −0.185 ± 0.078‰ (2SE), which provides the current best estimate of the K isotopic composition of the bulk Solar System. Samples of CI chondrites with δ41K values that deviate from this range likely reflect terrestrial contaminations or compositional heterogeneities at sampled sizes. In addition to CI chondrites, substantial K isotopic variability is observed in other carbonaceous chondrites and within individual chondritic groups, with δ41K values inversely correlated with K abundances in many cases. These observations indicate widespread fluid activity occurred in chondrite parent bodies, which significantly altered the original K abundances and isotopic compositions of chondrules and matrices established at their accretion.
KW - Aqueous alteration
KW - Asteroid Ryugu
KW - Carbonaceous chondrites
KW - Hayabusa2 mission
KW - Stable potassium isotopes
U2 - 10.1016/j.icarus.2023.115884
DO - 10.1016/j.icarus.2023.115884
M3 - Journal article
AN - SCOPUS:85177786366
VL - 409
JO - Icarus
JF - Icarus
SN - 0019-1035
M1 - 115884
ER -
ID: 380735693