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Variations of organic functional chemistry in carbonaceous matter from the asteroid 162173 Ryugu.


ABSTRACT: Primordial carbon delivered to the early earth by asteroids and meteorites provided a diverse source of extraterrestrial organics from pre-existing simple organic compounds, complex solar-irradiated macromolecules, and macromolecules from extended hydrothermal processing. Surface regolith collected by the Hayabusa2 spacecraft from the carbon-rich asteroid 162173 Ryugu present a unique opportunity to untangle the sources and processing history of carbonaceous matter. Here we show carbonaceous grains in Ryugu can be classified into three main populations defined by spectral shape: Highly aromatic (HA), Alkyl-Aromatic (AA), and IOM-like (IL). These carbon populations may be related to primordial chemistry, since C and N isotopic compositions vary between the three groups. Diffuse carbon is occasionally dominated by molecular carbonate preferentially associated with coarse-grained phyllosilicate minerals. Compared to related carbonaceous meteorites, the greater diversity of organic functional chemistry in Ryugu indicate the pristine condition of these asteroid samples.

SUBMITTER: De Gregorio B 

PROVIDER: S-EPMC11362305 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature

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Variations of organic functional chemistry in carbonaceous matter from the asteroid 162173 Ryugu.

De Gregorio Bradley B   Cody George D GD   Stroud Rhonda M RM   David Kilcoyne A L AL   Sandford Scott S   Le Guillou Corentin C   Nittler Larry R LR   Barosch Jens J   Yabuta Hikaru H   Martins Zita Z   Kebukawa Yoko Y   Okumura Taiga T   Hashiguchi Minako M   Yamashita Shohei S   Takeichi Yasuo Y   Takahashi Yoshio Y   Wakabayashi Daisuke D   Engrand Cécile C   Bejach Laure L   Bonal Lydie L   Quirico Eric E   Remusat Laurent L   Duprat Jean J   Verdier-Paoletti Maximilien M   Mostefaoui Smail S   Komatsu Mutsumi M   Mathurin Jérémie J   Dazzi Alexandre A   Deniset-Besseau Ariane A   Dartois Emmanuel E   Tamenori Yusuke Y   Suga Hiroki H   Montagnac Gilles G   Kamide Kanami K   Shigenaka Miho M   Matsumoto Megumi M   Enokido Yuma Y   Yoshikawa Makoto M   Saiki Takanao T   Tanaka Satoshi S   Terui Fuyuto F   Nakazawa Satoru S   Usui Tomohiro T   Abe Masanao M   Okada Tatsuaki T   Yada Toru T   Nishimura Masahiro M   Nakato Aiko A   Miyazaki Akiko A   Yogata Kasumi K   Yurimoto Hisayoshi H   Nakamura Tomoki T   Noguchi Takaaki T   Okazaki Ryuji R   Naraoka Hiroshi H   Sakamoto Kanako K   Tachibana Shogo S   Watanabe Sei-Ichiro SI   Tsuda Yuichi Y  

Nature communications 20240829 1


Primordial carbon delivered to the early earth by asteroids and meteorites provided a diverse source of extraterrestrial organics from pre-existing simple organic compounds, complex solar-irradiated macromolecules, and macromolecules from extended hydrothermal processing. Surface regolith collected by the Hayabusa2 spacecraft from the carbon-rich asteroid 162173 Ryugu present a unique opportunity to untangle the sources and processing history of carbonaceous matter. Here we show carbonaceous gra  ...[more]

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