The Astrophysical Journal Letters (Jan 2023)
The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu
- Martin Bizzarro,
- Martin Schiller,
- Tetsuya Yokoyama,
- Yoshinari Abe,
- Jérôme Aléon,
- Conel M. O’D. Alexander,
- Sachiko Amari,
- Yuri Amelin,
- Ken-ichi Bajo,
- 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,
- Noriyuki Kawasaki,
- Noriko T. Kita,
- Kouki Kitajima,
- Thorsten Kleine,
- Shintaro Komatani,
- Alexander N. Krot,
- Ming-Chang Liu,
- Yuki Masuda,
- Mayu Morita,
- Fréderic Moynier,
- Kazuko Motomura,
- Izumi Nakai,
- Kazuhide Nagashima,
- David Nesvorný,
- Ann Nguyen,
- Larry Nittler,
- Morihiko Onose,
- Andreas Pack,
- Changkun Park,
- Laurette Piani,
- Liping Qin,
- Sara S. Russell,
- Naoya Sakamoto,
- Maria Schönbächler,
- Lauren Tafla,
- Haolan Tang,
- Kentaro Terada,
- Yasuko Terada,
- Tomohiro Usui,
- Sohei Wada,
- Meenakshi Wadhwa,
- Richard J. Walker,
- Katsuyuki Yamashita,
- Qing-Zhu Yin,
- Shigekazu Yoneda,
- Edward D. Young,
- Hiroharu Yui,
- Ai-Cheng Zhang,
- Tomoki Nakamura,
- Hiroshi Naraoka,
- Takaaki Noguchi,
- 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
Affiliations
- Martin Bizzarro
- ORCiD
- Centre for Star and Planet Formation, Globe Institute, University of Copenhagen , DK-1350 Copenhagen K, Denmark ; [email protected]; Université Paris Cité , Institut de Physique du Globe de Paris, CNRS, F-75005 Paris, France
- Martin Schiller
- ORCiD
- Centre for Star and Planet Formation, Globe Institute, University of Copenhagen , DK-1350 Copenhagen K, Denmark ; [email protected]
- Tetsuya Yokoyama
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology , Tokyo 152-8551, Japan
- Yoshinari Abe
- Graduate School of Engineering Materials Science and Engineering, Tokyo Denki University , Tokyo 120-8551, Japan
- Jérôme Aléon
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université , Museum National d’Histoire Naturelle, CNRS UMR 7590, IRD, F-75005 Paris, France
- Conel M. O’D. Alexander
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , Washington, DC 20015, USA
- Sachiko Amari
- ORCiD
- McDonnell Center for the Space Sciences and Physics Department, Washington University , St. Louis, MO 63130, USA; Geochemical Research Center, The University of Tokyo , Tokyo 113-0033, Japan
- Yuri Amelin
- Korea Basic Science Institute , Ochang, Cheongwon, Cheongju, Chungbuk 28119, Republic of Korea
- Ken-ichi Bajo
- Natural History Sciences, IIL, Hokkaido University , Sapporo 001-0021, Japan
- Audrey Bouvier
- ORCiD
- Bayerisches Geoinstitut, Universität Bayreuth , D-95447 Bayreuth, Germany
- Richard W. Carlson
- ORCiD
- Department of Earth Science Education, Seoul National University , Seoul 08826, Republic of Korea
- Marc Chaussidon
- ORCiD
- Université Paris Cité , Institut de Physique du Globe de Paris, CNRS, F-75005 Paris, France
- Byeon-Gak Choi
- Department of Earth Science Education, Seoul National University , Seoul 08826, Republic of Korea
- Nicolas Dauphas
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago , 5734 South Ellis Avenue, Chicago, IL 60637, USA
- Andrew M. Davis
- Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago , 5734 South Ellis Avenue, Chicago, IL 60637, USA
- Tommaso Di Rocco
- Faculty of Geosciences and Geography, University of Göttingen , D-37077 Göttingen, Germany
- Wataru Fujiya
- ORCiD
- Faculty of Science, Ibaraki University , Mito 310-8512, Japan
- Ryota Fukai
- ORCiD
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Ikshu Gautam
- ORCiD
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology , Tokyo 152-8551, Japan
- Makiko K. Haba
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology , Tokyo 152-8551, Japan
- Yuki Hibiya
- ORCiD
- General Systems Studies, The University of Tokyo , Tokyo 153-0041, Japan
- Hiroshi Hidaka
- Earth and Planetary Sciences, Nagoya University , Nagoya 464-8601, Japan
- Hisashi Homma
- ORCiD
- Osaka Application Laboratory , SBUWDX, Rigaku Corporation, Osaka 569-1146, Japan
- Peter Hoppe
- ORCiD
- Max Planck Institute for Chemistry , D-55128 Mainz, Germany
- Gary R. Huss
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa ; Honolulu, HI 96822, USA
- Kiyohiro Ichida
- Analytical Technology, Horiba Techno Service Co., Ltd. , Kyoto 601-8125, Japan
- Tsuyoshi Iizuka
- ORCiD
- Earth and Planetary Science, The University of Tokyo , Tokyo 113-0033, Japan
- Trevor R. Ireland
- School of Earth and Environmental Sciences, The University of Queensland , St Lucia, QLD 4072, Australia
- Akira Ishikawa
- ORCiD
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology , Tokyo 152-8551, Japan
- Shoichi Itoh
- Earth and Planetary Sciences, Kyoto University , Kyoto 606-8502, Japan
- Noriyuki Kawasaki
- Natural History Sciences, IIL, Hokkaido University , Sapporo 001-0021, Japan
- Noriko T. Kita
- Geoscience, University of Wisconsin-Madison , Madison, WI 53706, USA
- Kouki Kitajima
- Geoscience, University of Wisconsin-Madison , Madison, WI 53706, USA
- Thorsten Kleine
- Max Planck Institute for Solar System Research , D-37077 Göttingen, Germany
- Shintaro Komatani
- Analytical Technology, Horiba Techno Service Co., Ltd. , Kyoto 601-8125, Japan
- Alexander N. Krot
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa ; Honolulu, HI 96822, USA
- Ming-Chang Liu
- Earth, Planetary, and Space Sciences, UCLA , Los Angeles, CA 90095, USA
- Yuki Masuda
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology , Tokyo 152-8551, Japan
- Mayu Morita
- Analytical Technology, Horiba Techno Service Co., Ltd. , Kyoto 601-8125, Japan
- Fréderic Moynier
- Université Paris Cité , Institut de Physique du Globe de Paris, CNRS, F-75005 Paris, France
- Kazuko Motomura
- Thermal Analysis , Rigaku Corporation, Tokyo 196-8666, Japan
- Izumi Nakai
- Department of Space Studies, Southwest Research Institute , Boulder, CO 80302, USA
- Kazuhide Nagashima
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa ; Honolulu, HI 96822, USA
- David Nesvorný
- Department of Space Studies, Southwest Research Institute , Boulder, CO 80302, USA
- Ann Nguyen
- Astromaterials Research and Exploration Science, NASA Johnson Space Center , Houston, TX 77058, USA
- Larry Nittler
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université , Museum National d’Histoire Naturelle, CNRS UMR 7590, IRD, F-75005 Paris, France
- Morihiko Onose
- Analytical Technology, Horiba Techno Service Co., Ltd. , Kyoto 601-8125, Japan
- Andreas Pack
- Faculty of Geosciences and Geography, University of Göttingen , D-37077 Göttingen, Germany
- Changkun Park
- Earth-System Sciences, Korea Polar Research Institute , Incheon 21990, Republic of Korea
- Laurette Piani
- Centre de Recherches Pétrographiques et Géochimiques, CNRS—Université de Lorraine , F-54500 Nancy, France
- Liping Qin
- University of Science and Technology of China , School of Earth and Space Sciences, Anhui 230026, People's Republic of China
- Sara S. Russell
- Department of Earth Sciences, Natural History Museum , London SW7 5BD, UK
- Naoya Sakamoto
- IIL, Hokkaido University , Sapporo 001-0021, Japan
- Maria Schönbächler
- Institute for Geochemistry and Petrology, Department of Earth Sciences, ETH Zurich , Zurich, Switzerland
- Lauren Tafla
- Thermal Analysis , Rigaku Corporation, Tokyo 196-8666, Japan
- Haolan Tang
- Thermal Analysis , Rigaku Corporation, Tokyo 196-8666, Japan
- Kentaro Terada
- Earth and Space Science, Osaka University , Osaka 560-0043, Japan
- Yasuko Terada
- Spectroscopy and Imaging, Japan Synchrotron Radiation Research Institute , Hyogo 679-5198 Japan
- Tomohiro Usui
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Sohei Wada
- Natural History Sciences, IIL, Hokkaido University , Sapporo 001-0021, Japan
- Meenakshi Wadhwa
- School of Earth and Space Exploration, Arizona State University , Tempe, AZ 85281, USA
- Richard J. Walker
- Geology, University of Maryland , College Park, MD 20742, USA
- Katsuyuki Yamashita
- Graduate School of Natural Science and Technology, Okayama University , Okayama 700-8530, Japan
- Qing-Zhu Yin
- Earth and Planetary Sciences, University of California , Davis, CA 95616, USA
- Shigekazu Yoneda
- Science and Engineering, National Museum of Nature and Science , Tsukuba 305-0005, Japan
- Edward D. Young
- Thermal Analysis , Rigaku Corporation, Tokyo 196-8666, Japan
- Hiroharu Yui
- Chemistry, Tokyo University of Science , Tokyo 162-8601, Japan
- Ai-Cheng Zhang
- School of Earth Sciences and Engineering, Nanjing University , Nanjing 210023, People's Republic of China
- Tomoki Nakamura
- Department of Earth Science, Tohoku University , Sendai 980-8578, Japan
- Hiroshi Naraoka
- Department of Earth and Planetary Sciences, Kyushu University , Fukuoka 819-0395, Japan
- Takaaki Noguchi
- Earth and Planetary Sciences, Kyoto University , Kyoto 606-8502, Japan
- Ryuji Okazaki
- Department of Earth and Planetary Sciences, Kyushu University , Fukuoka 819-0395, Japan
- Kanako Sakamoto
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Hikaru Yabuta
- Earth and Planetary Systems Science Program, Hiroshima University , Higashi-Hiroshima 739-8526, Japan
- Masanao Abe
- ORCiD
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Akiko Miyazaki
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Aiko Nakato
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Masahiro Nishimura
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Tatsuaki Okada
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Toru Yada
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Kasumi Yogata
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Satoru Nakazawa
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Takanao Saiki
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Satoshi Tanaka
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Fuyuto Terui
- Kanagawa Institute of Technology , Atsugi 243-0292, Japan
- Yuichi Tsuda
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Sei-ichiro Watanabe
- Earth and Planetary Sciences, Nagoya University , Nagoya 464-8601, Japan
- Makoto Yoshikawa
- ISAS/JSEC , JAXA, Sagamihara 252-5210, Japan
- Shogo Tachibana
- UTokyo Organization for Planetary and Space Science, University of Tokyo , Tokyo 113-0033, Japan
- Hisayoshi Yurimoto
- Natural History Sciences, IIL, Hokkaido University , Sapporo 001-0021, Japan
- DOI
- https://doi.org/10.3847/2041-8213/ad09d9
- Journal volume & issue
-
Vol. 958,
no. 2
p. L25
Abstract
The nucleosynthetic isotope composition of planetary materials provides a record of the heterogeneous distribution of stardust within the early solar system. In 2020 December, the Japan Aerospace Exploration Agency Hayabusa2 spacecraft returned to Earth the first samples of a primitive asteroid, namely, the Cb-type asteroid Ryugu. This provides a unique opportunity to explore the kinship between primitive asteroids and carbonaceous chondrites. We report high-precision μ ^26 Mg* and μ ^25 Mg values of Ryugu samples together with those of CI, CM, CV, and ungrouped carbonaceous chondrites. The stable Mg isotope composition of Ryugu aliquots defines μ ^25 Mg values ranging from –160 ± 20 ppm to –272 ± 30 ppm, which extends to lighter compositions relative to Ivuna-type (CI) and other carbonaceous chondrite groups. We interpret the μ ^25 Mg variability as reflecting heterogeneous sampling of a carbonate phase hosting isotopically light Mg ( μ ^25 Mg ∼ –1400 ppm) formed by low temperature equilibrium processes. After correcting for this effect, Ryugu samples return homogeneous μ ^26 Mg* values corresponding to a weighted mean of 7.1 ± 0.8 ppm. Thus, Ryugu defines a μ ^26 Mg* excess relative to the CI and CR chondrite reservoirs corresponding to 3.8 ± 1.1 and 11.9 ± 0.8 ppm, respectively. These variations cannot be accounted for by in situ decay of ^26 Al given their respective ^27 Al/ ^24 Mg ratios. Instead, it requires that Ryugu and the CI and CR parent bodies formed from material with a different initial ^26 Al/ ^27 Al ratio or that they are sourced from material with distinct Mg isotope compositions. Thus, our new Mg isotope data challenge the notion that Ryugu and CI chondrites share a common nucleosynthetic heritage.
Keywords
