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Publication Detail
The effect of pressure on thermal diffusivity in pyroxenes
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Hunt SA, Walker AM, McCormack RJ, Dobson DP, Wills AS, Li L
  • Publication date:
    01/10/2011
  • Pagination:
    2597, 2610
  • Journal:
    Mineralogical Magazine
  • Volume:
    75
  • Issue:
    5
  • Status:
    Published
  • Print ISSN:
    0026-461X
Abstract
The thermaldiffusivity of diopside, jadeite and enstatite were measured at simultaneous pressures and temperatures of up to 7 GPa and 1200 K using the X-radiographic Ångström method. The measurements herein show that the pressure dependency of thermaldiffusivity in pyroxenes is significantly greater than in olivine or garnet and that in the MORB-layer of a subducting slab the thermaldiffusivity of pyroxenes are a factor of 1.5 greater than that of olivine. The temperature dependence of all the data sets is well described by a low-order polynomial fit to 1/k and the pressure dependence is exponentialin 1/k, formulations which are consistent with the damped harmonic oscillator model for thermal properties. © 2011 The Mineralogical Society.
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Dept of Earth Sciences
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Dept of Earth Sciences
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Dept of Chemistry
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