Prediction of silicate melt viscosity from electrical conductivity: A model and its geophysical implications

TitlePrediction of silicate melt viscosity from electrical conductivity: A model and its geophysical implications
Publication TypeJournal Article
Year of Publication2013
AuthorsPommier A., Evans RL, Key K, Tyburczy J.A, Mackwell S., Elsenbeck J.
JournalGeochemistry Geophysics Geosystems
Volume14
Pagination1685-1692
Date Published2013/06
Type of ArticleArticle
ISBN Number1525-2027
Accession NumberWOS:000321960000001
Keywordsdensity; electrical conductivity; fluids; liquids; magma mixing; magmas; magnetotellurics; optical basicity; pressure; silicate melts; viscosity
Abstract

Our knowledge of magma dynamics would be improved if geophysical data could be used to infer rheological constraints in melt-bearing zones. Geophysical images of the Earth's interior provide frozen snapshots of a dynamical system. However, knowledge of a rheological parameter such as viscosity would constrain the time-dependent dynamics of melt bearing zones. We propose a model that relates melt viscosity to electrical conductivity for naturally occurring melt compositions (including H2O) and temperature. Based on laboratory measurements of melt conductivity and viscosity, our model provides a rheological dimension to the interpretation of electromagnetic anomalies caused by melt and partially molten rocks (melt fraction similar to >0.7).

DOI10.1002/ggge.20103
Short TitleGeochem. Geophys. Geosyst.
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Student Publication: 
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