Neodymium‐142 deficits and samarium neutron stratigraphy of C‐type asteroid (162173) Ryugu-Reference-Cited by-同舟云学术

Neodymium‐142 deficits and samarium neutron stratigraphy of C‐type asteroid (162173) Ryugu

Published:2023-12-07 Issue: Volume: Page:
ISSN:1086-9379
Container-title:Meteoritics & Planetary Science
language:en
Short-container-title:Meteorit & Planetary Scien

Author:

Torrano Zachary A.¹^ORCID,Jordan Michelle K.¹,Mock Timothy D.¹,Carlson Richard W.¹^ORCID,Gautam Ikshu²^ORCID,Haba Makiko K.²^ORCID,Yokoyama Tetsuya²^ORCID,Abe Yoshinari³,Aléon Jérôme⁴^ORCID,Alexander Conel¹^ORCID,Amari Sachiko⁵⁶^ORCID,Amelin Yuri⁷^ORCID,Bajo Ken‐ichi⁸,Bizzarro Martin⁹^ORCID,Bouvier Audrey¹⁰^ORCID,Chaussidon Marc¹¹^ORCID,Choi Byeon‐Gak¹²^ORCID,Dauphas Nicolas¹³^ORCID,Davis Andrew M.¹³^ORCID,Di Rocco Tommaso¹⁴^ORCID,Fujiya Wataru¹⁵^ORCID,Fukai Ryota¹⁶^ORCID,Hibiya Yuki¹⁷^ORCID,Hidaka Hiroshi¹⁸^ORCID,Homma Hisashi¹⁹,Hoppe Peter²⁰,Huss Gary R.²¹^ORCID,Ichida Kiyohiro²²,Iizuka Tsuyoshi²³^ORCID,Ireland Trevor²⁴^ORCID,Ishikawa Akira²^ORCID,Itoh Shoichi²⁵,Kawasaki Noriyuki⁸^ORCID,Kita Noriko T.²⁶^ORCID,Kitajima Koki²⁶^ORCID,Kleine Thorsten²⁷^ORCID,Komatani Shintaro²²,Krot Alexander N.²¹^ORCID,Liu Ming‐Chang²⁸^ORCID,Masuda Yuki²^ORCID,McKeegan Kevin D.²⁸^ORCID,Morita Mayu²²,Motomura Kazuko²⁹,Moynier Frédéric¹¹^ORCID,Nakai Izumi³⁰,Nagashima Kazuhide²¹^ORCID,Nguyen Ann³¹^ORCID,Nittler Larry³²^ORCID,Onose Morihiko²²,Pack Andreas¹⁴^ORCID,Park Changkun³³^ORCID,Piani Laurette³⁴^ORCID,Qin Liping³⁵,Russell Sara³⁶^ORCID,Sakamoto Naoya³⁷,Schönbächler Maria³⁸^ORCID,Tafla Lauren²⁹,Tang Haolan³⁵^ORCID,Terada Kentaro³⁹^ORCID,Terada Yasuko⁴⁰^ORCID,Usui Tomohiro¹⁶^ORCID,Wada Sohei²⁶^ORCID,Wadhwa Meenakshi³²^ORCID,Walker Richard J.⁴¹^ORCID,Yamashita Katsuyuki⁴²,Yin Qing‐Zhu⁴³,Yoneda Shigekazu⁴⁴^ORCID,Young Edward D.²⁹^ORCID,Yui Hiroharu⁴⁵^ORCID,Zhang Ai‐Cheng⁴⁶^ORCID,Nakamura Tomoki⁴⁷^ORCID,Naraoka Hiroshi⁴⁸^ORCID,Noguchi Takaaki²⁵^ORCID,Okazaki Ryuji⁴⁸^ORCID,Sakamoto Kanako¹⁶^ORCID,Yabuta Hikaru⁴⁹^ORCID,Abe Masanao¹⁶^ORCID,Miyazaki Akiko¹⁶^ORCID,Nakato Aiko¹⁶,Nishimura Masahiro¹⁶^ORCID,Okada Tatsuaki¹⁶^ORCID,Yada Toru¹⁶^ORCID,Yogata Kasumi¹⁶,Nakazawa Satoru¹⁶,Saiki Takanao¹⁶,Tanaka Satoshi¹⁶,Terui Fuyuto⁵⁰,Tsuda Yuichi¹⁶,Watanabe Sei‐ichiro¹⁸^ORCID,Yoshikawa Makoto¹⁶,Tachibana Shogo⁵¹^ORCID,Yurimoto Hisayoshi²⁶^ORCID

Affiliation:

1. Earth and Planets Laboratory Carnegie Institution for Science Washington DC USA

2. Department of Earth and Planetary Sciences Tokyo Institute of Technology Tokyo Japan

3. Graduate School of Engineering Materials Science and Engineering Tokyo Denki University Tokyo Japan

4. Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d'Histoire Naturelle CNRS UMR 7590, IRD Paris France

5. McDonnell Center for the Space Sciences and Physics Department Washington University St. Louis Missouri USA

6. Geochemical Research Center The University of Tokyo Tokyo Japan

7. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences Guangzhou China

8. Department of Natural History Sciences, IIL Hokkaido University Sapporo Japan

9. Centre for Star and Planet Formation GLOBE Institute, University of Copenhagen Copenhagen Denmark

10. Bayerisches Geoinstitut Universität Bayreuth Bayreuth Germany

11. Université Paris Cité, Institut de physique du globe de Paris, CNRS Paris France

12. Department of Earth Science Education Seoul National University Seoul Republic of Korea

13. Department of the Geophysical Sciences Enrico Fermi Institute, The University of Chicago Chicago Illinois USA

14. Faculty of Geosciences and Geography University of Göttingen Göttingen Germany

15. Faculty of Science Ibaraki University Mito Japan

16. ISAS/JSEC, JAXA Sagamihara Japan

17. General Systems Studies The University of Tokyo Tokyo Japan

18. Earth and Planetary Sciences Nagoya University Nagoya Japan

19. Osaka Application Laboratory SBUWDX, Rigaku Corporation Osaka Japan

20. Max Planck Institute for Chemistry Mainz Germany

21. Hawai‘i Institute of Geophysics and Planetology, University of Hawai‘i at Mānoa Honolulu Hawaii USA

22. Analytical Technology, Horiba Techno Service Co., Ltd Kyoto Japan

23. Earth and Planetary Science The University of Tokyo Tokyo Japan

24. School of Earth and Environmental Sciences The University of Queensland St Lucia Queensland Australia

25. Earth and Planetary Sciences Kyoto University Kyoto Japan

26. Geoscience, University of Wisconsin‐Madison Madison Wisconsin USA

27. Max Planck Institute for Solar System Research Göttingen Germany

28. Earth, Planetary, and Space Sciences, UCLA Los Angeles California USA

29. Thermal Analysis, Rigaku Corporation Tokyo Japan

30. Applied Chemistry Tokyo University of Science Tokyo Japan

31. Astromaterials Research and Exploration Science, NASA Johnson Space Center Houston Texas USA

32. School of Earth and Space Exploration Arizona State University Tempe Arizona USA

33. Earth‐System Sciences Korea Polar Research Institute Incheon Korea

34. Centre de Recherches Pétrographiques et Géochimiques CNRS—Université de Lorraine Nancy France

35. CAS Key Laboratory of Crust‐Mantle Materials and Environments University of Science and Technology of China, School of Earth and Space Sciences Anhui China

36. Department of Earth Sciences Natural History Museum London UK

37. Isotope Imaging Laboratory Creative Research Institution, Hokkaido University Sapporo Japan

38. Department of Earth Sciences, ETH Zurich Institute for Geochemistry and Petrology Zurich Switzerland

39. Earth and Space Science Osaka University Osaka Japan

40. Spectroscopy and Imaging Japan Synchrotron Radiation Research Institute Hyogo Japan

41. Geology, University of Maryland College Park Maryland USA

42. Graduate School of Natural Science and Technology Okayama University Okayama Japan

43. Earth and Planetary Sciences University of California Davis California USA

44. Science and Engineering National Museum of Nature and Science Tsukuba Japan

45. Chemistry Tokyo University of Science Tokyo Japan

46. School of Earth Sciences and Engineering Nanjing University Nanjing China

47. Department of Earth Science Tohoku University Sendai Japan

48. Department of Earth and Planetary Sciences Kyushu University Fukuoka Japan

49. Earth and Planetary Systems Science Program Hiroshima University Higashi‐Hiroshima Japan

50. Kanagawa Institute of Technology Atsugi Japan

51. UTokyo Organization for Planetary and Space Science University of Tokyo Tokyo Japan

Abstract

AbstractWe report Nd and Sm isotopic compositions of four samples of Ryugu returned by the Hayabusa2 mission, including “A” (first touchdown) and “C” (second touchdown) samples, and several carbonaceous chondrites to evaluate potential genetic relationships between Ryugu and known chondrite groups and track the cosmic ray exposure history of Ryugu. We resolved Nd and Sm isotopic anomalies in small (<20 ng Nd and Sm) sample sizes via thermal ionization mass spectrometer using 1013 Ω amplifiers. Ryugu samples exhibit resolvable negative μ142Nd values consistent with carbonaceous chondrite values, suggesting that Ryugu is related to the parent bodies of carbonaceous chondrites. Ryugu's negative μ149Sm values are the result of exposure to galactic cosmic rays, as demonstrated by the correlation between 150Sm/152Sm and 149Sm/152Sm ratios that fall along the expected neutron capture correlation line. The neutron fluence calculated in the “A” samples (2.75 ± 1.94 × 1015 n cm−2) is slightly higher compared to the “C” samples (0.95 ± 2.04 × 1015 n cm−2), though overlapping within measurement uncertainty. The Sm results for Ryugu, at this level of precision, thus are consistent with a well‐mixed surface layer at least to the depths from which the “A” and “C” samples derive.

Funder

Carnegie Institution for Science

Japan Society for the Promotion of Science

Publisher

Wiley

Subject

Space and Planetary Science,Geophysics

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.14109

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4. The Lu–Hf and Sm–Nd isotopic composition of CHUR: Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets

5. Enstatite chondrites EL3 as building blocks for the Earth: The debate over the 146Sm–142Nd systematics

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