Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu
Year: 2023
Type: article
Abstract: Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI chondrites and some types of space weathering. We report detailed mineralogy of the fine‐grained Ryugu samples allocated to our “Sand” team and report additional space weathering features found on the grains. The dominant mineralogy is composed of a fine‐grained mixture of Mg‐rich saponite and serpentine, magnetite, pyrrhotite, pentlandite, dolomite, and Fe‐bearing magnesite. These grains have mineralogy comparable to that of CI chondrites, showing severe aqueous alteration but lacking ferrihydrite and sulfate. These results are similar to previous works on large Ryugu grains. In addition to the major minerals, we also find many minerals that are rare or have not been reported among CI chondrites. Accessory minerals identified are hydroxyapatite, Mg‐Na phosphate, olivine, low‐Ca pyroxene, Mg‐Al spinel, chromite, manganochromite, eskolaite, ilmenite, cubanite, polydymite, transjordanite, schreibersite, calcite, moissanite, and poorly crystalline phyllosilicate. We also show scanning transmission electron microscope and scanning electron microscope compositional maps and images of some space‐weathered grains and severely heated and melted grains. Although our mineralogical results are consistent with that of millimeter‐sized grains, the fine‐grained fraction is best suited to investigate impact‐induced space weathering.
DOI: 10.1111/maps.14093
Authors: Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Bahae‐Eddine Mouloud, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre‐M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, William A. Smith, Sam McFadzean, Pierre‐Etienne Martin, Paul A. J. Bagot, Dennis Fougerouse, David W. Saxey, Steven Reddy, William D. A. Rickard, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Peter Hoppe, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda
Institutions: Kyoto University, The Hakubi Center for Advanced Research, Kyoto University, Kyoto University Institute for Chemical Research, Kyushu University, Institute for Materials Chemistry and Engineering, Kyushu University, The Ultramicroscopy Research Center, Kyushu University, Osaka Metropolitan University, Hiroshima University, Japan Agency for Marine-Earth Science and Technology, University of Hawaiʻi at Mānoa, Centre National de la Recherche Scientifique, Université de Lille, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Unité Matériaux et Transformations, Centrale Lille Institut, Institut Michel-Eugène Chevreul, Friedrich Schiller University Jena, Luxembourg Institute of Science and Technology, European Space Resources Innovation Centre, Institut de Planétologie et d'Astrophysique de Grenoble, Université Grenoble Alpes, Langley Research Center, Pennsylvania State University, University of Arizona, Purdue University West Lafayette, Arizona State University, United States Naval Research Laboratory, Naval Research Laboratory Materials Science and Technology Division, Jacobs (United States), University of Leicester, University of Glasgow, The University of Sydney, University of Oxford, Sydney Microscopy & Microanalysis, Curtin University, Johnson Space Center, Ritsumeikan University, Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, Japan Synchrotron Radiation Research Institute, University of Chinese Academy of Sciences, Ehime University, The University of Tokyo, Kindai University, Tohoku University, Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, The Graduate University for Advanced Studies, SOKENDAI, Kanagawa Institute of Technology, Hokkaido University, Institute for Integrated Innovations, Hokkaido University, Max Planck Society, Max Planck Institute for Chemistry, UTokyo Organization for Planetary and Space Science, Nagoya University
Language: English
Topic: Astro and Planetary Science
Subfield: Space and Planetary Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
Awards: Understanding of the diversity of prebiotic chemistries and emergence of molecular systems in various planetary environments in the Solar System, オリビンは地球型惑星マントルの水貯蔵に貢献するか?, High pressure in situ observation of hydrogen in mineral using electron microscope, The cosmic carbon observatory, Evolution of organic materials promoted by space weathering, 始原的炭素質コンドライト物質の水質変成の不均一性から初期太陽系の物質進化を探る, A Consolidated Grant Proposal for Solar and Planetary Science at the University of Leicester, 2019 - 2022, Ressearch on hydrogen in the deep earth by neutron crystallography and mass spectroscopy, G6991624444, ULNE, Were the so-called cometary dust particles originated from comets?: An combined study of materials analysis and spectroscopic observation., UK leadership in extraterrestrial sample return
OpenAlex ID: W4388965182