Electrical conductivity of a spinel lherzolite and a garnet peridotite to 1550°C: relevance to the effects of partial melting |
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Authors: | M H Manghnani C S Rai |
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Institution: | 1. Hawaii Institute of Geophysics, University of Hawaii, 96822, Honolulu, Hawaii
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Abstract: | 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. |
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