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

doi:10.1002/ggge.20103

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

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

18 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 language	English (US)
Pages (from-to)	1685-1692
Number of pages	8
Journal	Geochemistry, Geophysics, Geosystems
Volume	14
Issue number	6
DOIs	https://doi.org/10.1002/ggge.20103
State	Published - Jun 1 2013

Keywords

electrical conductivity
magma mixing
magnetotellurics
silicate melts
viscosity

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

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10.1002/ggge.20103

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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).",

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T2 - A model and its geophysical implications

AU - Pommier, Anne

AU - Evans, Rob L.

AU - Key, Kerry

AU - Tyburczy, James

AU - Mackwell, Stephen

AU - Elsenbeck, Jimmy

PY - 2013/6/1

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N2 - 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).

AB - 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).

KW - electrical conductivity

KW - magma mixing

KW - magnetotellurics

KW - silicate melts

KW - viscosity

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

Abstract

Keywords

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