Hydrothermal circulation and alteration at mid-ocean ridges and ridge flanks have a key role
in regulating seawater chemistry and global chemical fluxes, and support diverse …

The nine editions of Stable Isotope Geochemistry have appeared over a time span of nearly
50 years. The first edition (1973) appeared as a slim book of 135 pages. Due to the rapid …

Continental ultramafic rock systems, through the process of serpentinization, provide
chemical and biochemical pathways that lead to the production of methane. The extent to …

Microbial anaerobic oxidation of methane (AOM) substantially mitigates atmospheric
methane emissions on Earth and is a process to consider for astrobiological targets where …

Microbial methane oxidation-or methanotrophy-is a key control of the global methane
budget on Earth, and perhaps in other planetary systems. Here, we explore the potential role …

Naturally occurring hydrocarbon fluids in sedimentary basins have economic, geological
and environmental significance. Connecting sedimentary basin temperature-time evolution …

Methane clumped isotope analysis is a tool used to constrain the formation or equilibration
temperatures of methane, or to differentiate methane of thermogenic, microbial or …

Methane is a greenhouse gas and is an important component of carbon cycling in
freshwater environments. Isotope ratios of methane (13C/12C and D/H) are used extensively …

Alkaline fluids venting from chimneys of the Lost City hydrothermal field flow from a
potentially vast microbial habitat within the seafloor where energy and organic molecules …

Abiotic synthesis of CH 4 in seafloor hydrothermal fluids is generally assumed to occur via
heterogeneous reactions on mineral surfaces. Stepwise homogeneous reduction of CO 2 …