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

被引：21

作者：

Pommier, Anne ^{[1
]}

Evans, Rob L. ^{[2
]}

Key, Kerry ^{[3
]}

Tyburczy, James A. ^{[1
]}

Mackwell, Stephen ^{[4
]}

Elsenbeck, Jimmy ^{[2
]}

机构：

[1] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[2] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA

[3] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

[4] Lunar & Planetary Inst, Houston, TX 77058 USA

来源：

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS | 2013年 / 14卷 / 06期

基金：

美国国家科学基金会;

关键词：

electrical conductivity; magnetotellurics; viscosity; silicate melts; magma mixing; OPTICAL BASICITY; PRESSURE; MAGNETOTELLURICS; DENSITY; LIQUIDS; MAGMAS; FLUIDS;

D O I：

10.1002/ggge.20103

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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).

引用

页码：1685 / 1692

页数：8

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