MISC

2022年6月

On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
  • Eizo Nakamura
  • Katsura Kobayashi
  • Ryoji Tanaka
  • Tak Kunihiro
  • Hiroshi Kitagawa
  • Christian Potiszil
  • Tsutomu Ota
  • Chie Sakaguchi
  • Masahiro Yamanaka
  • Dilan M. Ratnayake
  • Havishk Tripathi
  • Rahul Kumar
  • Maya-Liliana Avramescu
  • Hidehisa Tsuchida
  • Yusuke Yachi
  • Hitoshi Miura
  • Masanao Abe
  • Ryota Fukai
  • Shizuho Furuya
  • Kentaro Hatakeda
  • Tasuku Hayashi
  • Yuya Hitomi
  • Kazuya Kumagai
  • Akiko Miyazaki
  • Aiko Nakato
  • Masahiro Nishimura
  • Tatsuaki Okada
  • Hiromichi Soejima
  • Seiji Sugita
  • Ayako Suzuki
  • Tomohiro Usui
  • Toru Yada
  • Daiki Yamamoto
  • Kasumi Yogata
  • Miwa Yoshitake
  • Masahiko Arakawa
  • Atsushi Fujii
  • Masahiko Hayakawa
  • Naoyuki Hirata
  • Naru Hirata
  • Rie Honda
  • Chikatoshi Honda
  • Satoshi Hosoda
  • Yu-ichi Iijima
  • Hitoshi Ikeda
  • Masateru Ishiguro
  • Yoshiaki Ishihara
  • Takahiro Iwata
  • Kosuke Kawahara
  • Shota Kikuchi
  • Kohei Kitazato
  • Koji Matsumoto
  • Moe Matsuoka
  • Tatsuhiro Michikami
  • Yuya Mimasu
  • Akira Miura
  • Tomokatsu Morota
  • Satoru Nakazawa
  • Noriyuki Namiki
  • Hirotomo Noda
  • Rina Noguchi
  • Naoko Ogawa
  • Kazunori Ogawa
  • Chisato Okamoto
  • Go Ono
  • Masanobu Ozaki
  • Takanao Saiki
  • Naoya Sakatani
  • Hirotaka Sawada
  • Hiroki Senshu
  • Yuri Shimaki
  • Kei Shirai
  • Yuto Takei
  • Hiroshi Takeuchi
  • Satoshi Tanaka
  • Eri Tatsumi
  • Fuyuto Terui
  • Ryudo Tsukizaki
  • Koji Wada
  • Manabu Yamada
  • Tetsuya Yamada
  • Yukio Yamamoto
  • Hajime Yano
  • Yasuhiro Yokota
  • Keisuke Yoshihara
  • Makoto Yoshikawa
  • Kent Yoshikawa
  • Masaki Fujimoto
  • Sei-ichiro Watanabe
  • Yuichi Tsuda
  • 全て表示

98
6
開始ページ
227
終了ページ
282
記述言語
英語
掲載種別
DOI
10.2183/pjab.98.015
出版者・発行元
JAPAN ACAD

Presented here are the observations and interpretations from a comprehensive analysis of 16 representative particles returned from the C-type asteroid Ryugu by the Hayabusa2 mission. On average Ryugu particles consist of 50% phyllosilicate matrix, 41% porosity and 9% minor phases, including organic matter. The abundances of 70 elements from the particles are in close agreement with those of CI chondrites. Bulk Ryugu particles show higher delta O-18, Delta O-17, and epsilon Cr-54 values than CI chondrites. As such, Ryugu sampled the most primitive and least-thermally processed protosolar nebula reservoirs. Such a finding is consistent with multi-scale H-C-N isotopic compositions that are compatible with an origin for Ryugu organic matter within both the protosolar nebula and the interstellar medium. The analytical data obtained here, suggests that complex soluble organic matter formed during aqueous alteration on the Ryugu progenitor planetesimal (several 10's of km), <2.6 Myr after CAI formation. Subsequently, the Ryugu progenitor planetesimal was fragmented and evolved into the current asteroid Ryugu through sublimation.

リンク情報
DOI
https://doi.org/10.2183/pjab.98.015
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/35691845
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9246647
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000812946100001&DestApp=WOS_CPL
ID情報
  • DOI : 10.2183/pjab.98.015
  • ISSN : 0386-2208
  • eISSN : 1349-2896
  • PubMed ID : 35691845
  • PubMed Central 記事ID : PMC9246647
  • Web of Science ID : WOS:000812946100001

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