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

Between 12 and 40 N on the Mid-Atlantic Ridge (MAR), high-or low-temperature
hydrothermal activity and mantle degassing are indicative of ongoing serpentinization …

We estimate that domains with frequent outcrops of mantle-derived ultramafics represent
about 20–25% of the seafloor created at ridges spreading at rates less than 40 mm a− 1 and …

This chapter describes the practice in the analysis and interpretation of noble gases in
modern hydrothermal systems, including sample collection and analytical methods …

Mid-ocean ridge (MOR) hydrothermal vent fluids are enriched with dissolved barium, but
due to barite (BaSO 4) precipitation during mixing between Ba-bearing vent fluids and SO 4 …

High-temperature hydrothermal activity occurs in all ocean basins and along ridge crests of
all spreading rates. While it has long been recognized that the fluxes associated with such …

The hydrothermal vent field Loki's Castle is located in the Mohns-Knipovich bend (73° N) of
the ultraslow spreading Arctic Mid-Ocean Ridge (AMOR) close to the Bear Island sediment …

Hydrothermal processes on slow spreading ridges exhibit several features that distinguish
them from their counterparts at fast and intermediate rate spreading centers. These …

Natural gases from the Sichuan Basin, China were analyzed to investigate helium
abundances and isotopic composition in order to assess crustal vs. mantle inputs into the …

Accurate estimates of near-axis hydrothermal cooling are keys to understanding many
geological, chemical, and biological processes at midocean ridges. At present, however …