Bulletin of Volcanology

, Volume 74, Issue 9, pp 2109–2120

Hydrogen emissions from Erebus volcano, Antarctica

  • Yves Moussallam
  • Clive Oppenheimer
  • Alessandro Aiuppa
  • Gaetano Giudice
  • Manuel Moussallam
  • Philip Kyle
Research Article

DOI: 10.1007/s00445-012-0649-2

Cite this article as:
Moussallam, Y., Oppenheimer, C., Aiuppa, A. et al. Bull Volcanol (2012) 74: 2109. doi:10.1007/s00445-012-0649-2

Abstract

The continuous measurement of molecular hydrogen (H2) emissions from passively degassing volcanoes has recently been made possible using a new generation of low-cost electrochemical sensors. We have used such sensors to measure H2, along with SO2, H2O and CO2, in the gas and aerosol plume emitted from the phonolite lava lake at Erebus volcano, Antarctica. The measurements were made at the crater rim between December 2010 and January 2011. Combined with measurements of the long-term SO2 emission rate for Erebus, they indicate a characteristic H2 flux of 0.03 kg s–1 (2.8 Mg  day–1). The observed H2 content in the plume is consistent with previous estimates of redox conditions in the lava lake inferred from mineral compositions and the observed CO2/CO ratio in the gas plume (∼0.9 log units below the quartz–fayalite–magnetite buffer). These measurements suggest that H2 does not combust at the surface of the lake, and that H2 is kinetically inert in the gas/aerosol plume, retaining the signature of the high-temperature chemical equilibrium reached in the lava lake. We also observe a cyclical variation in the H2/SO2 ratio with a period of ∼10 min. These cycles correspond to oscillatory patterns of surface motion of the lava lake that have been interpreted as signs of a pulsatory magma supply at the top of the magmatic conduit.

Keywords

Erebus volcano Hydrogen Magma redox conditions Lava lake Volcanic degassing 

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Yves Moussallam
    • 1
  • Clive Oppenheimer
    • 1
    • 2
    • 3
  • Alessandro Aiuppa
    • 4
    • 5
  • Gaetano Giudice
    • 5
  • Manuel Moussallam
    • 6
  • Philip Kyle
    • 7
  1. 1.Department of GeographyUniversity of CambridgeDowning PlaceUK
  2. 2.Le Studium, Institute for Advanced StudiesOrléans and ToursFrance
  3. 3.L’Institut des Sciences de la Terre d’Orléansl’Université d’OrléansOrléans Cedex 2France
  4. 4.Dipartimento DiSTeMUniversità di PalermoPalermoItaly
  5. 5.Istituto Nazionale di Geofisica e VulcanologiaPalermoItaly
  6. 6.Institut Telecom–Telecom ParisTech–CNRS/LTCIParisFrance
  7. 7.Department of Earth and Environmental ScienceNew Mexico Institute of Mining and TechnologySocorroUSA