Bulletin Volcanologique

, Volume 41, Issue 4, pp 328–332 | Cite as

Electrical conductivity of a spinel lherzolite and a garnet peridotite to 1550°C: relevance to the effects of partial melting

  • M. H. Manghnani
  • C. S. Rai
Chapter I: Physico-chemical Aspect Of Magma Generation


Electrical conductivity σ of two ultramafic rocks (a spinel lherzolite and a garnet peridotite) has been investigated to melting temperature at 1 bar under known oxygen fugacity environment. The electrical conductivity of the two rocks is found to increase with degree of partial melting and an ∼ 15% melt fraction is necessary for the electrical conductivity to increase by ∼ 1 order of magnitude. For a given melt fraction electrical conductivity of a spinel lherzolite is lower than that of a garnet peridotite and may be attributed to the differences in the composition of the melts formed.


Electrical Conductivity Partial Melting Oxygen Fugacity Ultramafic Rock Garnet Peridotite 
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Copyright information

© Intern. Association of Volcanology and Chemistry of the Earth’s Interior 1978

Authors and Affiliations

  • M. H. Manghnani
    • 1
  • C. S. Rai
    • 1
  1. 1.Hawaii Institute of GeophysicsUniversity of HawaiiHonolulu

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