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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).
- Pommier, Anne (Author)
- Evans, Rob L. (Author)
- Key, Kerry (Author)
- Tyburczy, James (Author)
- Mackwell, Stephen (Author)
- Elsenbeck, Jimmy (Author)
- College of Liberal Arts and Sciences (Contributor)
Pommier, A., Evans, R. L., Key, K., Tyburczy, J. A., Mackwell, S., & Elsenbeck, J. (2013). Prediction of silicate melt viscosity from electrical conductivity: A model and its geophysical implications. Geochemistry, Geophysics, Geosystems, 14(6), 1685–1692. doi:10.1002/ggge.20103
- 2014-03-20 06:08:13
- 2021-10-25 05:23:34
- 3 years ago