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The electrical conductivity of materials containing partial melt: A simple model from Archie's law
Author(s) -
Hermance John F.
Publication year - 1979
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl006i007p00613
Subject(s) - electrical resistivity and conductivity , conductivity , simple (philosophy) , materials science , porosity , partial melting , porous medium , mineralogy , geology , composite material , physics , geophysics , chemistry , philosophy , epistemology , quantum mechanics , mantle (geology)
The presence of partial melt can profoundly affect the bulk electrical properties of composite materials. A class of 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 tortuously distributed, larger amounts are required to produce a given increase of the bulk conductivity, than if it is thoroughly interconnected along grain boundaries.