Melt migration in a silicate liquid-olivine system - An experimental test of compaction theory

Details Melt migration in a silicate liquid-olivine system - An experimental test of compaction theory Melt migration in a silicate liquid-olivine system - An experimental test of compaction theory

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2101r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Nov. 1990, p. 2101-2104.

Physics

27

Melts (Crystal Growth), Olivine, Peridotite, Porosity, Silicates, Boundary Conditions, Capillary Flow, Computerized Simulation, Free Energy, Permeability

Scientific paper

An experimentally derived melt migration profile is compared with those obtained from compaction theory. A couple is prepared in which a source-for-melt (a disk composed of a silicate glass and olivine) was placed in contact with a sink-for-melt (a disk of polycrystalline olivine) in order to induce melt migration under laboratory conditions. It is noted that melt infiltrates into the sink disk along triple junctions driven by capillary forces. In order to analyze the melt migration profile in terms of compaction theory, the equations developed by McKenzie (1984) to describe porous flow of a liquid in a deformable matrix were modified. The bouyancy force term is replaced with a capillary force term and governing equations are then solved numerically with the initial boundary conditions specified by the experimental design. Also, it is determined that compaction theory provides a good description of the experimental results provided that the permeability of these solid-liquid materials increases linearly with increasing liquid fraction.

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