Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body

Philippe Schmitt-Kopplin (), Norbert Hertkorn, Mourad Harir, Franco Moritz, Marianna Lucio, Lydie Bonal, Eric Quirico, Yoshinori Takano, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hisayoshi Yurimoto, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Tatsuaki Okada, Sei-ichiro Watanabe and Yuichi Tsuda
Additional contact information
Philippe Schmitt-Kopplin: Technische Universität München, Analytische Lebensmittel Chemie
Norbert Hertkorn: Helmholtz Munich, Analytical BioGeoChemistry
Mourad Harir: Helmholtz Munich, Analytical BioGeoChemistry
Franco Moritz: Helmholtz Munich, Analytical BioGeoChemistry
Marianna Lucio: Helmholtz Munich, Analytical BioGeoChemistry
Lydie Bonal: Université Grenoble Alpes, CNRS, CNES, IPAG
Eric Quirico: Université Grenoble Alpes, CNRS, CNES, IPAG
Yoshinori Takano: Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Jason P. Dworkin: NASA Goddard Space Flight Center
Hiroshi Naraoka: Kyushu University
Shogo Tachibana: University of Tokyo
Tomoki Nakamura: Tohoku University
Takaaki Noguchi: Kyoto University
Ryuji Okazaki: Kyushu University
Hikaru Yabuta: Hiroshima University
Hisayoshi Yurimoto: Hokkaido University
Kanako Sakamoto: Japan Aerospace Exploration Agency (ISAS/JAXA)
Toru Yada: Japan Aerospace Exploration Agency (ISAS/JAXA)
Masahiro Nishimura: Japan Aerospace Exploration Agency (ISAS/JAXA)
Aiko Nakato: Japan Aerospace Exploration Agency (ISAS/JAXA)
Akiko Miyazaki: Japan Aerospace Exploration Agency (ISAS/JAXA)
Kasumi Yogata: Japan Aerospace Exploration Agency (ISAS/JAXA)
Masanao Abe: Japan Aerospace Exploration Agency (ISAS/JAXA)
Tomohiro Usui: Japan Aerospace Exploration Agency (ISAS/JAXA)
Makoto Yoshikawa: Japan Aerospace Exploration Agency (ISAS/JAXA)
Takanao Saiki: Japan Aerospace Exploration Agency (ISAS/JAXA)
Satoshi Tanaka: Japan Aerospace Exploration Agency (ISAS/JAXA)
Fuyuto Terui: Japan Aerospace Exploration Agency (ISAS/JAXA)
Satoru Nakazawa: Japan Aerospace Exploration Agency (ISAS/JAXA)
Tatsuaki Okada: Japan Aerospace Exploration Agency (ISAS/JAXA)
Sei-ichiro Watanabe: Nagoya University
Yuichi Tsuda: Japan Aerospace Exploration Agency (ISAS/JAXA)

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The sample from the near-Earth carbonaceous asteroid (162173) Ryugu is analyzed in the context of carbonaceous meteorites soluble organic matter. The analysis of soluble molecules of samples collected by the Hayabusa2 spacecraft shines light on an extremely high molecular diversity on the C-type asteroid. Sequential solvent extracts of increasing polarity of Ryugu samples are analyzed using mass spectrometry with complementary ionization methods and structural information confirmed by nuclear magnetic resonance spectroscopy. Here we show a continuum in the molecular size and polarity, and no organomagnesium molecules are detected, reflecting a low temperature and water-rich environment on the parent body approving earlier mineralogical and chemical data. High abundance of sulfidic and nitrogen rich compounds as well as high abundance of ammonium ions confirm the water processing. Polycyclic aromatic hydrocarbons are also detected in a structural continuum of carbon saturations and oxidations, implying multiple origins of the observed organic complexity, thus involving generic processes such as earlier carbonization and serpentinization with successive low temperature aqueous alteration.

Date: 2023
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Citations: View citations in EconPapers (2)

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DOI: 10.1038/s41467-023-42075-y

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