Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid Ryugu

DOI Web Site 1 Citations 69 References
  • Megumi Matsumoto
    Department of Earth and Planetary Materials Sciences, Tohoku University, Miyagi 980-8578, Japan.
  • Junya Matsuno
    Research Organization of Science and Technology, Ritsumeikan University, Shiga 525-8577, Japan.
  • Akira Tsuchiyama
    Research Organization of Science and Technology, Ritsumeikan University, Shiga 525-8577, Japan.
  • Tomoki Nakamura
    Department of Earth and Planetary Materials Sciences, Tohoku University, Miyagi 980-8578, Japan.
  • Yuma Enokido
    Department of Earth and Planetary Materials Sciences, Tohoku University, Miyagi 980-8578, Japan.
  • Mizuha Kikuiri
    Department of Earth and Planetary Materials Sciences, Tohoku University, Miyagi 980-8578, Japan.
  • Aiko Nakato
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Masahiro Yasutake
    Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Hyogo 679-5198, Japan.
  • Kentaro Uesugi
    Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Hyogo 679-5198, Japan.
  • Akihisa Takeuchi
    Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Hyogo 679-5198, Japan.
  • Satomi Enju
    Earth’s Evolution and Environment Course, Department of Mathematics, Physics, and Earth Science, Ehime University, Ehime 790-8577, Japan.
  • Shota Okumura
    Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
  • Itaru Mitsukawa
    Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
  • Mingqi Sun
    Chinese Academy of Sciences (CAS) Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640, China.
  • Akira Miyake
    Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
  • Mitsutaka Haruta
    Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
  • Yohei Igami
    Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
  • Hisayoshi Yurimoto
    Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan.
  • Takaaki Noguchi
    Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.
  • Ryuji Okazaki
    Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
  • Hikaru Yabuta
    Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-HiroshimaHiroshima 739-8526, Japan.
  • Hiroshi Naraoka
    Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.
  • Kanako Sakamoto
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Shogo Tachibana
    Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Michael Zolensky
    NASA Johnson Space Center, Houston, TX 77058, USA.
  • Toru Yada
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Masahiro Nishimura
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Akiko Miyazaki
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Kasumi Yogata
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Masanao Abe
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Tatsuaki Okada
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Tomohiro Usui
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Makoto Yoshikawa
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Takanao Saiki
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Satoshi Tanaka
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Fuyuto Terui
    Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi 243-0292, Japan.
  • Satoru Nakazawa
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Sei-ichiro Watanabe
    Department of Earth and Environmental Sciences, Nagoya University, Nagoya 464-8601, Japan.
  • Yuichi Tsuda
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.

Description

<jats:p>The Hayabusa2 spacecraft delivered samples of the carbonaceous asteroid Ryugu to Earth. Some of the sample particles show evidence of micrometeoroid impacts, which occurred on the asteroid surface. Among those, particles A0067 and A0094 have flat surfaces on which a large number of microcraters and impact melt splashes are observed. Two impact melt splashes and one microcrater were analyzed to unveil the nature of the objects that impacted the asteroid surface. The melt splashes consist mainly of Mg-Fe–rich glassy silicates and Fe-Ni sulfides. The microcrater trapped an impact melt consisting mainly of Mg-Fe–rich glassy silicate, Fe-Ni sulfides, and minor silica-rich glass. These impact melts show a single compositional trend indicating mixing of Ryugu surface materials and impactors having chondritic chemical compositions. The relict impactor in one of the melt splashes shows mineralogical similarity with anhydrous chondritic interplanetary dust particles having a probable cometary origin. The chondritic micrometeoroids probably impacted the Ryugu surface during its residence in a near-Earth orbit.</jats:p>

Journal

  • Science Advances

    Science Advances 10 (3), 2024-01-19

    American Association for the Advancement of Science (AAAS)

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