Variations in hydrothermal methane and hydrogen concentrations following the 1998 eruption at Axial Volcano

Variations in hydrothermal methane and hydrogen concentrations following the 1998 eruption at Axial Volcano

During the February response cruise to Axial Volcano, methane and hydrogen concentrations within the plume were significantly elevated above background. CH4/³He ratios were found to be 5–10 times greater than previously reported values for unsedimented ridges. An average δ13C value of −32.7±0.8‰ was...

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Veröffentlicht in:Geophysical research letters 1999-12, Vol.26 (23), p.3453-3456
Hauptverfasser: McLaughlin-West, E. A., Olson, E. J., Lilley, M. D., Resing, J. A., Lupton, J. E., Baker, E. T., Cowen, J. P.
Format: Artikel
Sprache:eng
Schlagworte:
Marine
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Zusammenfassung:During the February response cruise to Axial Volcano, methane and hydrogen concentrations within the plume were significantly elevated above background. CH4/³He ratios were found to be 5–10 times greater than previously reported values for unsedimented ridges. An average δ13C value of −32.7±0.8‰ was determined for CH4 concentrations >10 nM and CH4/Mn ratios were determined to be 2.2. Hydrogen concentrations as high as 183 nM were measured; however most were
ISSN:0094-8276
1944-8007
DOI:10.1029/1999GL002336