0588389 - ÚFCH JH 2025 RIV US eng J - Journal Article
Changela, Hitesh Gunvantrai - Kebukawa, Y. - Petera, Lukáš - Ferus, Martin - Chatzitheodoridis, E. - Nejdl, L. - Nebel, Roman - Protiva, Václav - Křepelka, P. - Moravcová, J. - Holbová, R. - Hlavenková, Z. - Šamořil, T. - Bridges, J. C. - Yamashita, S. - Takahashi, Y. - Yada, T. - Nakato, A. - Sobotková, K. - Tesařová, H. - Zapotok, D.
The evolution of organic material on Asteroid 162173 Ryugu and its delivery to Earth.
Nature Communications. Roč. 15, č. 1 (2024), č. článku 6165. ISSN 2041-1723. E-ISSN 2041-1723
R&D Projects: GA MŠMT EH22_008/0004558; GA TA ČR(CZ) TN02000009
Institutional support: RVO:61388955
Keywords : aqueous alteration * matter * chemistry * chondrites * meteorite * origin * renazzo
OECD category: Physical chemistry
Impact factor: 14.7, year: 2023 ; AIS: 5.656, rok: 2023
Method of publishing: Open access
DOI: https://doi.org/10.1038/s41467-024-50004-w

The recent return of samples from asteroid 162173 Ryugu provides a first insight into early Solar System prebiotic evolution from known planetary bodies. Ryugu's samples are CI chondrite-like, rich in water and organic material, and primarily composed of phyllosilicate. This phyllosilicate surrounds micron to submicron macromolecular organic particles known as insoluble organic matter. Using advanced microscopy techniques on Hayabusa-2 samples, we find that aqueous alteration on Ryugu produced organic particles richer in aromatics compared to less altered carbonaceous chondrites. This challenges the view that aromatic-rich organic matter formed pre-accretion. Additionally, widespread diffuse organic material occurs in phyllosilicate more aliphatic-, carboxylic-rich, and aromatic-poor than the discrete organic particles, likely preserving the soluble organic material. Some organic particles evolved to encapsulate phyllosilicate, indicating that aqueous alteration on Ryugu led to the containment of soluble organic matter within these particles. Earth therefore has been, and continues to be, delivered micron-sized polymeric organic objects containing biologically relevant molecules.
Permanent Link: https://hdl.handle.net/11104/0355289