Methane and Hydrogen At Lost City
Lost City vent fluid H2 concentrations are 0.5 to 14.4 mmol/kg [Proskurowski et al., 2006], which are greater than the highest H2 concentrations in fluids from basaltic environments that are unperturbed by magmatic and eruptive events [Kelley et al., 2002; Lilley et al., 2003]. These highly reducing conditions lead to elevated concentrations of CH4 (1-2 mmol/kg) in the Lost City fluids [Proskurowski et al., 2006].
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