Journal ArticleDOI
The electrical conductivity of materials containing partial melt: A simple model from Archie's law
TLDR
In this paper, a class of partial melt distributions is considered where melt forms is one place and accumulates elsewhere; a case modelled by a simple modification of Archie's Law for porous media.Abstract:
The presence of partial melt can profoundly affect the bulk electrical properties of composite materials. A class of melt distributions is considered where melt distributions is considered where melt forms is one place and accumulates elsewhere; a case modelled by a simple modification of Archie's Law for porous media. This relation provides values for the bulk conductivity intermediate to those for a thoroughly connected melt distribution and those for isolated melt pockets. Thus, if melt is tortously distributed, larger amounts are required to produce a given increase of the bulk conductivity, than if it is thoroughly interconnected along grain boundaries.read more
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Book
The Rock Physics Handbook: Tools for Seismic Analysis of Porous Media
TL;DR: In this article, the authors present basic tools for elasticity and Hooke's law, effective media, granular media, flow and diffusion, and fluid effects on wave propagation for wave propagation.
MonographDOI
The Rock Physics Handbook
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Water in the lower continental crust: modelling magnetotelluric and seismic reflection results
Roy D. Hyndman,Peter M. Shearer +1 more
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Electrical properties of granite with implications for the lower crust
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References
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Journal ArticleDOI
Properties of some common igneous rocks and their melts at high temperatures
TL;DR: The properties of four igneous rocks (a tholeiitic and an alkali-olivine basalt, an andesite, and a rhyolite) and a synthetic lunar sample have been determined at atmospheric pressure over a range of temperatures including their melting interval as discussed by the authors.
Journal ArticleDOI
The effect of pressure on the electrical resistivity of water‐saturated crystalline rocks
TL;DR: In this article, the electrical resistivity of eight igneous rocks and two crystalline limestones was measured at pressures to 10 kb, and the dependence of resistivity on temperature, porosity, and pore fluid salinity suggested that conduction was primarily electrolytic throughout the entire pressure range.
Journal ArticleDOI
Equilibrium fluid distribution in an ultramafic partial melt under hydrostatic stress conditions
H. S. Waff,J. R. Bulau +1 more
TL;DR: In this article, the geometrical distribution of the fluid phase in partially molten mafic material has been studied under conditions providing close approach to textural equilibrium, and the results confirm that surface energy plays a dominant role in determining fluid distribution in equilibrium partial melts of silicate composition.
Journal ArticleDOI
Theoretical considerations of electrical conductivity in a partially molten mantle and implications for geothermometry
TL;DR: In this paper, the relationship between bulk effective electrical conductivity, melt fraction, and liquid path connectivity is derived for a partially melted material, and the results are compared with results obtained for exact geometrical models for the limiting cases of isolated melt pockets and complete grain boundary wetting.
Journal ArticleDOI
Partial melting and electrical conductivity anomalies in the upper mantle
Thomas J. Shankland,H. S. Waff +1 more
TL;DR: In this article, the authors use effective medium theory to model the conductivity of peridotite as a basalt melt fraction within a mainly olivine matrix, and estimate both the temperature and the degree of partial melting.
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Theoretical considerations of electrical conductivity in a partially molten mantle and implications for geothermometry
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Roy D. Hyndman,Peter M. Shearer +1 more