A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu

DOI: 10.1038/s41550-022-01841-6

Authors: Takaaki Noguchi (Kyoto University) , Toru Matsumoto (Kyoto University) , Akira Miyake (Kyoto University) , Yohei Igami (Kyoto University) , Mitsutaka Haruta (Kyoto University) , Hikaru Saito (Kyushu University) , Satoshi Hata (Kyushu University) , Yusuke Seto (Osaka Metropolitan University) , Masaaki Miyahara (Hiroshima University) , Naotaka Tomioka (Kochi Institute for Core Sample Research) , Hope A. Ishii (The University of Hawai’i at Mānoa) , John P. Bradley (The University of Hawai’i at Mānoa) , Kenta K. Ohtaki (The University of Hawai’i at Mānoa) , Elena Dobrică (The University of Hawai’i at Mānoa) , Hugues Leroux (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Corentin Le Guillou (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Damien Jacob (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Francisco De La Peña (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Sylvain Laforet (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Maya Marinova (Unité Matériaux et Transformations UMR 8207, Université de Lille, CNRS, INRAE) , Falko Langenhorst (Friedrich-Schiller-Universität Jena) , Dennis Harries (Luxembourg Institute of Science and Technology) , Pierre Beck (Université Grenoble Alpes) , Thi H. V. Phan (Université Grenoble Alpes) , Rolando Rebois (Université Grenoble Alpes) , Neyda M. Abreu (NASA Langley Research Center) , Jennifer Gray (The Pennsylvania State University Materials Research Institute) , Thomas Zega (The University of Arizona) , Pierre-M. Zanetta (The University of Arizona) , Michelle S. Thompson (Purdue University) , Rhonda Stroud (Arizona State University) , Kate Burgess (US Naval Research Laboratory) , Brittany A. Cymes (US Naval Research Laboratory) , John C. Bridges (The University of Leicester) , Leon Hicks (The University of Leicester) , Martin R. Lee (The University of Glasgow) , Luke Daly (The University of Glasgow; The University of Sydney; The University of Oxford) , Phil A. Bland (Curtin University) , Michael E. Zolensky (NASA Johnson Space Center) , David R. Frank (The University of Hawai’i at Mānoa) , James Martinez (Jacobs Engineering) , Akira Tsuchiyama (Ritsumeikan University; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS); CAS Center for Excellence in Deep Earth Science) , Masahiro Yasutake (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8)) , Junya Matsuno (Ritsumeikan University) , Shota Okumura (Kyoto University) , Itaru Mitsukawa (Kyoto University) , Kentaro Uesugi (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8)) , Masayuki Uesugi (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8)) , Akihisa Takeuchi (Japan Synchrotron Radiation Research Institute (JASRI/SPring-8)) , Mingqi Sun (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS); CAS Center for Excellence in Deep Earth Science; University of Chinese Academy of Sciences) , Satomi Enju (Ehime University) , Aki Takigawa (The University of Tokyo) , Tatsuhiro Michikami (Kindai University) , Tomoki Nakamura (Tohoku University) , Megumi Matsumoto (Tohoku University) , Yusuke Nakauchi (Japan Aerospace Exploration Agency) , Masanao Abe (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Masahiko Arakawa (Kobe University) , Atsushi Fujii (Japan Aerospace Exploration Agency) , Masahiko Hayakawa (Japan Aerospace Exploration Agency) , Naru Hirata (The University of Aizu) , Naoyuki Hirata (Kobe University) , Rie Honda (Kochi University) , Chikatoshi Honda (The University of Aizu) , Satoshi Hosoda (Tohoku University) , Yu-Ichi Iijima (Japan Aerospace Exploration Agency) , Hitoshi Ikeda (Japan Aerospace Exploration Agency) , Masateru Ishiguro (Seoul National University) , Yoshiaki Ishihara (Japan Aerospace Exploration Agency) , Takahiro Iwata (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Kousuke Kawahara (Japan Aerospace Exploration Agency) , Shota Kikuchi (Chiba Institute of Technology) , Kohei Kitazato (The University of Aizu) , Koji Matsumoto (National Astronomical Observatory of Japan; The Graduate University for Advanced Studies (SOKENDAI)) , Moe Matsuoka (Japan Aerospace Exploration Agency) , Yuya Mimasu (Japan Aerospace Exploration Agency) , Akira Miura (Japan Aerospace Exploration Agency) , Tomokatsu Morota (The University of Tokyo) , Satoru Nakazawa (Japan Aerospace Exploration Agency) , Noriyuki Namiki (National Astronomical Observatory of Japan; The Graduate University for Advanced Studies (SOKENDAI)) , Hirotomo Noda (National Astronomical Observatory of Japan; The Graduate University for Advanced Studies (SOKENDAI)) , Rina Noguchi (Niigata University) , Naoko Ogawa (Japan Aerospace Exploration Agency) , Kazunori Ogawa (Japan Aerospace Exploration Agency) , Tatsuaki Okada (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Chisato Okamoto (Kobe University) , Go Ono (Japan Aerospace Exploration Agency) , Masanobu Ozaki (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Takanao Saiki (Japan Aerospace Exploration Agency) , Naoya Sakatani (Rikkyo University) , Hirotaka Sawada (Japan Aerospace Exploration Agency) , Hiroki Senshu (Chiba Institute of Technology) , Yuri Shimaki (Japan Aerospace Exploration Agency) , Kei Shirai (Kobe University) , Seiji Sugita (The University of Tokyo; Chiba Institute of Technology) , Yuto Takei (Japan Aerospace Exploration Agency) , Hiroshi Takeuchi (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Satoshi Tanaka (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Eri Tatsumi (University of La Laguna; The University of Tokyo) , Fuyuto Terui (Kanagawa Institute of Technology) , Ryudo Tsukizaki (Japan Aerospace Exploration Agency) , Koji Wada (Chiba Institute of Technology) , Manabu Yamada (Chiba Institute of Technology) , Tetsuya Yamada (Japan Aerospace Exploration Agency) , Yukio Yamamoto (Japan Aerospace Exploration Agency) , Hajime Yano (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Yasuhiro Yokota (Japan Aerospace Exploration Agency) , Keisuke Yoshihara (Japan Aerospace Exploration Agency) , Makoto Yoshikawa (Japan Aerospace Exploration Agency; The Graduate University for Advanced Studies (SOKENDAI)) , Kent Yoshikawa (Japan Aerospace Exploration Agency) , Ryohta Fukai (Japan Aerospace Exploration Agency) , Shizuho Furuya (Japan Aerospace Exploration Agency) , Kentaro Hatakeda (Marine Works Japan Ltd) , Tasuku Hayashi (Japan Aerospace Exploration Agency) , Yuya Hitomi (Marine Works Japan Ltd) , Kazuya Kumagai (Marine Works Japan Ltd) , Akiko Miyazaki (Japan Aerospace Exploration Agency) , Aiko Nakato (Japan Aerospace Exploration Agency) , Masahiro Nishimura (Japan Aerospace Exploration Agency) , Hiromichi Soejima (Marine Works Japan Ltd) , Ayako I. Suzuki (Marine Works Japan Ltd) , Tomohiro Usui (Japan Aerospace Exploration Agency) , Toru Yada (Japan Aerospace Exploration Agency) , Daiki Yamamoto (Japan Aerospace Exploration Agency) , Kasumi Yogata (Japan Aerospace Exploration Agency) , Miwa Yoshitake (Japan Aerospace Exploration Agency) , Harold C. Connolly (The University of Arizona; Rowan University) , Dante S. Lauretta (The University of Arizona) , Hisayoshi Yurimoto (Hokkaido University) , Kazuhide Nagashima (The University of Hawai’i at Mānoa) , Noriyuki Kawasaki (Hokkaido University) , Naoya Sakamoto (Hokkaido University) , Ryuji Okazaki (Kyushu University) , Hikaru Yabuta (Hiroshima University) , Hiroshi Naraoka (Kyushu University) , Kanako Sakamoto (Japan Aerospace Exploration Agency) , Shogo Tachibana (The University of Tokyo) , Sei-Ichiro Watanabe (Nagoya University) , Yuichi Tsuda (Japan Aerospace Exploration Agency)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Astronomy , VOL 121

State: Published (Approved)
Published: December 2022

Abstract: Without a protective atmosphere, space-exposed surfaces of airless Solar System bodies gradually experience an alteration in composition, structure and optical properties through a collective process called space weathering. The return of samples from near-Earth asteroid (162173) Ryugu by Hayabusa2 provides the first opportunity for laboratory study of space-weathering signatures on the most abundant type of inner solar system body: a C-type asteroid, composed of materials largely unchanged since the formation of the Solar System. Weathered Ryugu grains show areas of surface amorphization and partial melting of phyllosilicates, in which reduction from Fe3+ to Fe2+ and dehydration developed. Space weathering probably contributed to dehydration by dehydroxylation of Ryugu surface phyllosilicates that had already lost interlayer water molecules and to weakening of the 2.7 µm hydroxyl (–OH) band in reflectance spectra. For C-type asteroids in general, this indicates that a weak 2.7 µm band can signify space-weathering-induced surface dehydration, rather than bulk volatile loss.

Diamond Keywords: Asteroids

Subject Areas: Earth Science, Chemistry, Physics


Instruments: I14-Hard X-ray Nanoprobe

Added On: 22/12/2022 15:35

Documents:
s41550-022-01841-6.pdf

Discipline Tags:

Earth Sciences & Environment Physics Geology Geochemistry Planetary Geology Astronomy & Astrophysics

Technical Tags:

Imaging Spectroscopy X-ray Fluorescence (XRF) X-ray Absorption Spectroscopy (XAS) X-ray Absorption Near Edge Structure (XANES)