Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu
文献类型：期刊论文
| 作者 | Piani, Laurette53; Nagashima, Kazuhide52; Kawasaki, Noriyuki51; Sakamoto, Naoya50; Bajo, Ken-ichi51; Abe, Yoshinari49; Aleon, Jerome48; Alexander, Conel M. O'D.2; Amari, Sachiko45,46,47; Amelin, Yuri44 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 946期号:2页码:11 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/acc393 |
| 英文摘要 | Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu's hydrous minerals, D/H-Ryugu, to be [165 +/- 19] x 10(-6), which corresponds to delta D-Ryugu = +59 +/- 121 parts per thousand (2 sigma). The hydrous mineral D/H-Ryugu's values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu's samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth's surficial reservoirs is evaluated to be similar to 3%. We conclude that the water responsible for the alteration of Ryugu's rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H-2 before being accreted on the Ryugu's parent asteroid. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000992237400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74329]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Piani, Laurette |
| 作者单位 | 1.Univ Maryland, Dept Geol, College Pk, MD 20742 USA 2.Carnegie Inst Sci, Earth & Planets Lab, Washington, DC 20015 USA 3.Univ Tokyo, UTokyo Org Planetary & Space Sci, Tokyo 1130033, Japan 4.Kanagawa Inst Technol, Atsugi, Kanagawa 2430292, Japan 5.Hiroshima Univ, Earth & Planetary Syst Sci Program, Higashihiroshima 7398526, Japan 6.Kyushu Univ, Dept Earth & Planetary Sci, Fukuoka 8190395, Japan 7.Tohoku Univ, Dept Earth Sci, Sendai, Miyagi 9808578, Japan 8.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China 9.Tokyo Univ Sci, Chem, Tokyo 1628601, Japan 10.Natl Museum Nat & Sci, Sci & Engn, Tsukuba, Ibaraki 3050005, Japan |
| 推荐引用方式 GB/T 7714 | Piani, Laurette,Nagashima, Kazuhide,Kawasaki, Noriyuki,et al. Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu[J]. ASTROPHYSICAL JOURNAL LETTERS,2023,946(2):11. |
| APA | Piani, Laurette.,Nagashima, Kazuhide.,Kawasaki, Noriyuki.,Sakamoto, Naoya.,Bajo, Ken-ichi.,...&Yurimoto, Hisayoshi.(2023).Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu.ASTROPHYSICAL JOURNAL LETTERS,946(2),11. |
| MLA | Piani, Laurette,et al."Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu".ASTROPHYSICAL JOURNAL LETTERS 946.2(2023):11. |
入库方式： OAI收割
来源：广州地球化学研究所
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