Low-temperature aqueous alteration of chondrites

MR Lee, CMOD Alexander, A Bischoff… - Space Science …, 2025‏ - Springer
Chondritic meteorites (chondrites) contain evidence for the interaction of liquid water with
the interiors of small bodies early in Solar System history. Here we review the processes …

Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu

Y Takano, H Naraoka, JP Dworkin, T Koga… - Nature …, 2024‏ - nature.com
We report primordial aqueous alteration signatures in water-soluble organic molecules from
the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 spacecraft of JAXA. Newly …

[HTML][HTML] Three-dimensional textures of Ryugu samples and their implications for the evolution of aqueous alteration in the Ryugu parent body

A Tsuchiyama, M Matsumoto, J Matsuno… - … et Cosmochimica Acta, 2024‏ - Elsevier
Samples collected from the surface/subsurface of C-type asteroid 162,173 Ryugu by the
Hayabusa2 mission were nondestructively analyzed in three dimensions (3D). Seventy …

JWST reveals CO ice, concentrated CO2 deposits, and evidence for carbonates potentially sourced from Ariel's interior

RJ Cartwright, BJ Holler, WM Grundy… - The Astrophysical …, 2024‏ - iopscience.iop.org
Abstract The Uranian moon Ariel exhibits a diversity of geologically young landforms, with a
surface composition rich in CO 2 ice. The origin of CO 2 and other species, however …

Sodium carbonates on Ryugu as evidence of highly saline water in the outer Solar System

T Matsumoto, T Noguchi, A Miyake, Y Igami… - Nature …, 2024‏ - nature.com
Water activity recorded in asteroids offers a perspective on their habitability. Aqueous
alteration, namely the interaction of liquid water with minerals, occurred in the parent body of …

Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples

NT Kita, K Kitajima, K Nagashima… - … & Planetary Science, 2024‏ - Wiley Online Library
Oxygen 3‐isotope ratios of magnetite and carbonates in aqueously altered carbonaceous
chondrites provide important clues to understanding the evolution of the fluid in the …

Update on the 53Mn-53Cr ages of dolomite in the Ivuna CI chondrite and asteroid Ryugu sample

S Sugawara, W Fujiya, N Kawasaki, N Sakamoto… - … et Cosmochimica Acta, 2024‏ - Elsevier
Aqueous alteration in planetesimals is one of the earliest geological processes in the solar
system. The timing of aqueous alteration sheds light on the timescale of material evolution …

[HTML][HTML] Correlated IR-SEM-TEM studies of three different grains from Ryugu: From the initial material to post-accretional processes

A Aléon-Toppani, R Brunetto, Z Dionnet… - … et Cosmochimica Acta, 2024‏ - Elsevier
In order to better constrain the alteration history of the Ryugu parent body, we performed a
multi-analytical study combining scanning electron microscopy, transmission electron …

[HTML][HTML] Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration

H Yui, S Urashima, M Onose, M Morita… - … et Cosmochimica Acta, 2024‏ - Elsevier
The surface chemistry of pyrrhotites from intact particles directly collected from asteroid
(162173) Ryugu was investigated by micro-Raman spectroscopy. The Raman peak …

Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu

T Yoshimura, D Araoka, H Naraoka, S Sakai… - Nature …, 2024‏ - nature.com
Returned samples from the carbonaceous asteroid (162173) Ryugu provide pristine
information on the original aqueous alteration history of the Solar System. Secondary …