[Article Publication] A paper by Assistant Professor Koike et al. on carbonate-associated sulfate in Martian meteorites has been published in Earth and Planetary Science Letters.

A paper by Assistant Professor Koike et al. on carbonate-associated sulfate in Martian meteorites has been published in Earth and Planetary Science Letters. In this study, carbonate-associated sulfate (CAS) was first detected in a Martian meteorite (ALH84001) about 4 billion years ago by local sulfur speciation using the SPring-8 synchrotron radiation facility. CAS are sulfate ions that were present in Martian groundwater 4 billion years ago and were incorporated into carbonate minerals during their formation. This study suggests that the Martian environment was once more reductive than today, maintaining a neutral to slightly alkaline fluid (Published paper url).