Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
書誌事項
- 公開日
- 2023-09-18
- 資源種別
- journal article
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/s41467-023-40871-0
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>Samples from the carbonaceous asteroid (162173) Ryugu provide information on the chemical evolution of organic molecules in the early solar system. Here we show the element partitioning of the major component ions by sequential extractions of salts, carbonates, and phyllosilicate-bearing fractions to reveal primordial brine composition of the primitive asteroid. Sodium is the dominant electrolyte of the salt fraction extract. Anions and NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup> are more abundant in the salt fraction than in the carbonate and phyllosilicate fractions, with molar concentrations in the order SO<jats:sub>4</jats:sub><jats:sup>2− </jats:sup>> Cl<jats:sup>− </jats:sup>> S<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub><jats:sup>2− </jats:sup>> NO<jats:sub>3</jats:sub><jats:sup>− </jats:sup>> NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>. The salt fraction extracts contain anionic soluble sulfur-bearing species such as S<jats:sub><jats:italic>n</jats:italic></jats:sub>-polythionic acids (<jats:italic>n</jats:italic> < 6), C<jats:sub><jats:italic>n</jats:italic></jats:sub>-alkylsulfonates, alkylthiosulfonates, hydroxyalkylsulfonates, and hydroxyalkylthiosulfonates (<jats:italic>n</jats:italic> < 7). The sulfur-bearing soluble compounds may have driven the molecular evolution of prebiotic organic material transforming simple organic molecules into hydrophilic, amphiphilic, and refractory S allotropes.</jats:p>
収録刊行物
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- Nature Communications
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Nature Communications 14 (1), 5284-, 2023-09-18
Springer Science and Business Media LLC
