How and where did life on Earth originate? To date, various environments have been
proposed as plausible sites for the origin of life. However, discussions have focused on a …

The genetic identification of different types of natural gas is notably important for assessment
of its sources and exploration potential. The chemical and isotopic (C and H, in particular) …

Geologic molecular hydrogen (H 2) occurs in the subsurface and vents and seeps at the
surface. However, this valuable natural resource is under-utilized in the economy because …

Serpentinization involves the hydrolysis and transformation of primary ferromagnesian
minerals such as olivine ((Mg, Fe) 2SiO4) and pyroxenes ((Mg, Fe) SiO3) to produce H2-rich …

This paper proposes a comparative study of reduced gas seepages occurring in ultrabasic
to basic rocks outcropping in ophiolitic complexes based on the study of seepages from …

Microbial methanogenesis may have been a major component of Earth's carbon cycle
during the Archaean eon, generating a methane greenhouse that increased global …

Both hydrogen and methane are consistently discharged in large quantities in hydrothermal
fluids issued from ultramafic-hosted hydrothermal fields discovered along the Mid-Atlantic …

Abiotic gaseous hydrocarbons comprise a fascinating, but poorly understood, group of Earth
fluids generated by magmatic and gas–water–rock reactions that do not directly involve …

Serpentinization of ultramafic rocks provides molecular hydrogen (H2) that can support
lithotrophic metabolism of microorganisms, but also poses extremely challenging conditions …

Serpentinization in hydrothermal vents is central to some autotrophic theories for the origin
of life because it generates compartments, reductants, catalysts and gradients. During the …