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

Anne Pommier, Rob L. Evans, Kerry Key, James Tyburczy, Stephen Mackwell, Jimmy Elsenbeck

Research output: Contribution to journalArticle

11 Scopus citations

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 ∼ >0.7).

Original languageEnglish (US)
Pages (from-to)1685-1692
Number of pages8
JournalGeochemistry, Geophysics, Geosystems
Volume14
Issue number6
DOIs
StatePublished - Jun 1 2013

Keywords

  • electrical conductivity
  • magma mixing
  • magnetotellurics
  • silicate melts
  • viscosity

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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