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Active serpentinization systems are abundant on present-day Earth and are of increasing interest because water–rock reactions lead to alkaline, Ca–OH fluids that have the potential to sequester CO 2 and form reduced chemical species (e.g. CH 4 and H 2 ) that can support chemolithoautotrophy. We present a study of alkaline (pH 10–12) springs in the Voltri Massif (Italy) that...
Fluid circulation in peridotite-hosted hydrothermal systems influences the incorporation of carbon into the oceanic crust and its long-term storage. At low to moderate temperatures, serpentinization of peridotite produces alkaline fluids that are rich in CH 4 and H 2 . Upon mixing with seawater, these fluids precipitate carbonate, forming an extensive network of calcite veins in the...
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