Vanessa Helmbrecht

Enceladus-like geochemistry fuels methanogenesis under extreme CO 2 limitation

Saturn’s icy moon Enceladus features chemical signatures consistent with an alkaline soda ocean with H 2 production via hydrothermal water-rock reactions. Chemolithoautotrophic methanogenesis is thermodynamically favorable under these conditions, but it is unknown whether CO 2 sc...