Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites - Tout INSP
Article Dans Une Revue Icarus Année : 2023

Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites

Yan Hu (1) , Fréderic Moynier (1) , Wei Dai (1) , Marine Paquet (1) , Tetsuya Yokoyama (2) , Yoshinari Abe (3) , Jérôme Aléon (4) , Conel M. O'D. Alexander (5) , Sachiko Amari (6) , Yuri Amelin (7) , Ken-Ichi Bajo (8) , Martin Bizzarro (9) , Audrey Bouvier (10) , Richard W Carlson (5) , Marc Chaussidon (1) , Byeon- Gak Choi (11) , Nicolas Dauphas (12) , Andrew M Davis (12) , Tommaso Di Rocco (13) , Wataru Fujiya (14) , Ryota Fukai (15) , Ikshu Gautam (2) , Makiko K Haba (2) , Yuki Hibiya (16) , Hiroshi Hidaka (17) , Hisashi Homma (18) , Peter Hoppe (19) , Gary R Huss (20) , Kiyohiro Ichida (21) , Tsuyoshi Iizuka (22) , Trevor R Ireland (23) , Akira Ishikawa (2) , Shoichi Itoh (24) , Noriyuki Kawasaki (25) , Noriko T Kita (26) , Kouki Kitajima (26) , Thorsten Kleine (27) , Shintaro Komatani (21) , Alexander N Krot (20) , Ming-Chang Liu (28) , Yuki Masuda (2) , Mayu Morita (21) , Kazuko Motomura (29) , Izumi Nakai (30) , Kazuhide Nagashima (20) , David Nesvorný (31) , Ann Nguyen (32) , Larry Nittler (5) , Morihiko Onose (21) , Andreas Pack (13) , Changkun Park (33) , Laurette Piani (34) , Liping Qin (35) , Sara S Russell (36) , Naoya Sakamoto (37) , Maria Schönbächler (38) , Lauren Tafla (28) , Haolan Tang (35) , Kentaro Terada (39) , Yasuko Terada (40) , Tomohiro Usui (15) , Sohei Wada (25) , Meenakshi Wadhwa (41) , Richard J Walker (42) , Katsuyuki Yamashita (43) , Qing-Zhu Yin (44) , Shigekazu Yoneda (45) , Edward D Young (28) , Hiroharu Yui (46) , Ai- Cheng Zhang (47) , Tomoki Nakamura (48) , Hiroshi Naraoka (49) , Takaaki Noguchi (24) , Ryuji Okazaki (49) , Kanako Sakamoto (15) , Hikaru Yabuta (50) , Masanao Abe (15) , Akiko Miyazaki (15) , Aiko Nakato (15) , Masahiro Nishimura (15) , Tatsuaki Okada (15) , Toru Yada (15) , Kasumi Yogata (15) , Satoru Nakazawa (15) , Takanao Saiki (15) , Satoshi Tanaka (15) , Fuyuto Terui (51) , Yuichi Tsuda (15) , Sei-Ichiro Watanabe (52) , Makoto Yoshikawa (15) , Shogo Tachibana (53) , Hisayoshi Yurimoto (25)
1 Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, 75005 Paris, France
2 Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan
3 Graduate School of Engineering Materials Science and Engineering, Tokyo Denki University, Tokyo 120-8551, Japan
4 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
5 Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC, 20015, USA
6 McDonnell Center for Space Sciences
7 Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, GD 510640, China
8 Natural History Sciences, IIL, Hokkaido University, Sapporo 001-0021, Japan
9 Globe Institute
10 Bayerisches Geoinstitut, Universität Bayreuth, Bayreuth 95447, Germany
11 Department of Earth Science Education, Seoul National University, Seoul 08826, Republic of Korea
12 Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637, USA
13 Faculty of Geosciences and Geography, University of Göttingen, Göttingen, D-37077, Germany
14 Faculty of Science, Ibaraki University, Mito 310-8512, Japan
15 ISAS/JSEC, JAXA, Sagamihara 252-5210, Japan
16 Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan
17 Department of Earth and Planetary Sciences, Nagoya University, Nagoya 464-8601, Japan.
18 Osaka Application Laboratory, SBUWDX, Rigaku Corporation, Osaka 569-1146, Japan.
19 Max Planck Institute for Chemistry, Mainz 55128, Germany
20 UHM - University of Hawai‘i [Mānoa]
21 Analytical Technology, Horiba Techno Service Co., Ltd., Kyoto 601-8125, Japan
22 Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan
23 UQ [All campuses : Brisbane, Dutton Park Gatton, Herston, St Lucia and other locations] - The University of Queensland
24 Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan
25 Department of Natural History Sciences, Hokkaido University, Sapporo 001-0021, Japan
26 Department of Geoscience [Madison]
27 Max Planck Institute for Solar System Research, 37077 Göttingen, Germany
28 EPSS - Department of Earth, Planetary and Space Sciences [Los Angeles]
29 Thermal Analysis, Rigaku Corporation, Tokyo 196-8666, Japan
30 Department of Applied Chemistry, Tokyo University of Science, Tokyo 162-8601, Japan
31 Department of Space Studies [Boulder]
32 Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77058, USA
33 Earth-System Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
34 CRPG - Centre de Recherches Pétrographiques et Géochimiques
35 CAS Key Laboratory of Crust-Mantle Materials and Environments, University of Science and Technology of China, School of Earth and Space Sciences, Anhui 230026, China
36 Department of Earth Sciences, Natural History Museum, London, SW7 5BD, UK
37 Isotope Imaging Laboratory, Creative Research Institution, Hokkaido University, Sapporo 001-0021, Japan
38 Institute for Geochemistry and Petrology, Department of Earth Sciences, ETH Zurich, 8092 Zurich, Switzerland
39 Department of Earth and Space Science, Osaka University, Osaka 560-0043, Japan
40 Spectroscopy and Imaging, Japan Synchrotron Radiation Research Institute, Hyogo 679-5198 Japan
41 ASU - Arizona State University [Tempe]
42 Department of Geology, University of Maryland, College Park, MD 20742, USA
43 Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
44 Department of Earth and Planetary Sciences, University of California, Davis, CA 95616, USA
45 Department of Science and Engineering, National Museum of Nature and Science, Tsukuba 305-0005, Japan
46 Department of Chemistry, Tokyo University of Science, Tokyo 162-8601, Japan
47 School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
48 Department of Earth Science, Tohoku University, Sendai, 980-8578, Japan
49 Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan
50 Earth and Planetary Systems Science Program, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
51 Kanagawa Institute of Technology, Atsugi 243-0292, Japan
52 Department of Earth and Planetary Sciences, Nagoya University, Nagoya 464-8601, Japan
53 UTOPS - UTokyo Organization for Planetary and Space Science
Martin Bizzarro
  • Fonction : Auteur

Résumé

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 suc- cessfully 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.
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Dates et versions

hal-04616201 , version 1 (18-06-2024)

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Yan Hu, Fréderic Moynier, Wei Dai, Marine Paquet, Tetsuya Yokoyama, et al.. Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites. Icarus, 2023, 409, pp.115884. ⟨10.1016/j.icarus.2023.115884⟩. ⟨hal-04616201⟩
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