Physics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pepi...55..269b&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 55, Issue 3-4, p. 269-276.
Physics
35
Scientific paper
We have conducted a series of constant strain-rate experiments on a synthetic peridotite composed of isostatically hot-pressed olivine and orthopyroxene, over a pressure range of 700-2200 MPa and a temperature range of 1250-1700 K. By using a sample assembly in which specimens are surrounded by molten salt, the data are of much higher quality than previously obtained in solid pressure-medium apparatus. We find that both the temperature and pressure dependence of creep in our experiments can be combined quantitatively as the homologous temperature dependence of creep. This quantitative relationship between creep and melting greatly simplifies the thermodynamic treatment of creep, and provides a simple model for the extrapolation of laboratory creep data for peridotite to conditions throughout the Earth's upper mantle.
Borch R. S.
Green Harry W.
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