Journal of Physics of the Earth
Online ISSN : 1884-2305
Print ISSN : 0022-3743
ISSN-L : 0022-3743
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Volume 15, Issue 2
Displaying 1-2 of 2 articles from this issue
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  • Electrical Conductivities of Rock-Forming Minerals at High Temperatures
    Hitoshi MIZUTANI, Hiroo KANAMORI
    1967 Volume 15 Issue 2 Pages 25-31
    Published: 1967
    Released on J-STAGE: April 30, 2009
    DOIhttps://doi.org/10.4294/jpe1952.15.25
    JOURNAL FREE ACCESS
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    Electrical conductivities of olivine, quartz, garnet, corundum, jadeite and alkali feldspar are measured over the temperature range 500 to 1200°K. Electrical conductivities σ of these rock-forming minerals can be expressed by an equation similar to that for semi-conductors;
    σ=σ01exp(-ε1/kT)+σ02exp(-ε2/kT)+…
    where εi's are the activation energies, k, Boltzmann constant and σ0i's, constants. Although the type of conduction mechanism cannot be determined definitely, the activation energies of various rock-forming minerals fall between 0.7 and 1.7eV over the temperature range studied. The pre-exponential term σ0i, however, varies several orders of magnitude for different minerals.
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  • Attenuation of Seismic Waves
    Ryosuke SATO
    1967 Volume 15 Issue 2 Pages 32-61
    Published: 1967
    Released on J-STAGE: April 30, 2009
    DOIhttps://doi.org/10.4294/jpe1952.15.32
    JOURNAL FREE ACCESS
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