The Earth atmosphere‐like bulk nitrogen isotope composition obtained by stepwise combustion analyses of Ryugu return samples

DOI Web Site 被引用文献1件 参考文献67件 オープンアクセス
  • Ko Hashizume
    Faculty of Science Ibaraki University Mito Japan
  • Akizumi Ishida
    Department of Earth Science Tohoku University Sendai Japan
  • Ayano Chiba
    Faculty of Science Ibaraki University Mito Japan
  • Ryuji Okazaki
    Department of Earth and Planetary Sciences Kyushu University Fukuoka Japan
  • Kasumi Yogata
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Toru Yada
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Fumio Kitajima
    Department of Earth and Planetary Sciences Kyushu University Fukuoka Japan
  • Hisayoshi Yurimoto
    Department of Earth and Planetary Sciences Hokkaido University Sapporo Japan
  • Tomoki Nakamura
    Department of Earth Science Tohoku University Sendai Japan
  • Takaaki Noguchi
    Division of Earth and Planetary Sciences Kyoto University Kyoto Japan
  • Hikaru Yabuta
    Department of Earth and Planetary Systems Science Hiroshima University Higashi‐Hiroshima Japan
  • Hiroshi Naraoka
    Department of Earth and Planetary Sciences Kyushu University Fukuoka Japan
  • Yoshinori Takano
    Biogeochemistry Research Center, Japan Agency for Marine‐Earth Science and Technology Yokosuka Japan
  • Kanako Sakamoto
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Shogo Tachibana
    UTokyo Organization for Planetary and Space Science The University of Tokyo Tokyo Japan
  • Masahiro Nishimura
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Aiko Nakato
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Akiko Miyazaki
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Masanao Abe
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Tatsuaki Okada
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Tomohiro Usui
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Makoto Yoshikawa
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Takanao Saiki
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Fuyuto Terui
    Kanagawa Institute of Technology Atsugi Japan
  • Satoshi Tanaka
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Satoru Nakazawa
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Sei‐ichiro Watanabe
    Department of Earth and Environmental Sciences Nagoya University Nagoya Japan
  • Yuichi Tsuda
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan
  • Michael W. Broadley
    CRPG, CNRS, Université de Lorraine Vandoeuvre‐lès‐Nancy France
  • Henner Busemann
    Institute of Geochemistry and Petrology, ETH Zürich Zürich Switzerland

書誌事項

公開日
2024-04-30
資源種別
journal article
権利情報
  • http://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1111/maps.14175
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>The nitrogen isotope compositions of two samples returned from the asteroid Ryugu were determined using a stepwise combustion method, along with Ivuna (CI) and Y‐980115, a CI‐like Antarctic meteorite, as references. The two Ryugu samples A0105‐07 and C0106‐07 showed bulk δ<jats:sup>15</jats:sup>N values of +1.7 ± 0.5‰ and +0.2 ± 0.6‰, respectively, significantly lower than Ivuna with +36.4 ± 0.4‰, but close to Y‐980115 with +4.0 ± 0.3‰. The Ryugu samples are further characterized by C/N and <jats:sup>36</jats:sup>Ar/N ratios up to 3.4× and 4.9× the value of Ivuna, respectively. Among all Ryugu samples and CI chondrites, a positive correlation was observed between nitrogen concentrations and δ<jats:sup>15</jats:sup>N values, with samples with lower nitrogen concentrations exhibiting lower δ<jats:sup>15</jats:sup>N. This trend is explained by a two‐component mixing model. One component is present at a constant abundance among all CI‐related samples, with a δ<jats:sup>15</jats:sup>N value around 0‰ or lower. The other varies in abundance between different samples, and exhibits a δ<jats:sup>15</jats:sup>N value of +56 ± 4‰. The first <jats:sup>15</jats:sup>N‐poor endmember is seemingly tightly incorporated into a carbonaceous host phase, whereas the <jats:sup>15</jats:sup>N‐rich endmember can be mobilized and decoupled from carbon, potentially because it is in the form of ammonia. Asteroid materials with volatile compositions that are similar to those reported here for the Ryugu samples are attractive candidates for the volatile sources among Earth's building blocks.</jats:p>

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