Thermal diffusivity and heat of formation of harzburgite and its major constituent minerals

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Abstract

The thermal diffusivity, D, and its temperature dependence of Oman harzburgite rock and its major mineral olivine have been evaluated from the basic properties such as seismic velocities, density, and Debye temperature. The Arrheniustype temperature dependence of the diffusivity was utilized to evaluate the heat of formation, ΔH D. The diffusivity values, 1.80mm 2.s -1 and 2.1mm 2.s -1 obtained at room temperature for harzburgite and olivine, respectively, are consistent with available data. The diffusivity values for Oman harzburgite are overestimated by an amount of 0.27mm 2.s -1 relative to those of PNG harzburgite. The ΔH D value (-2.40 kJ.mol -1) for harzburgite rock of the Oman ophiolite suite is comparable with that (-2.90 kJ.mol -1) of the harzburgite rock of Papua New Guinea. The disagreements in the thermal diffusivity and heat of formation values may be partly due to ignoring the effect of pyroxene in Oman harzburgite.

Original languageEnglish
Pages (from-to)2139-2147
Number of pages9
JournalInternational Journal of Thermophysics
Volume32
Issue number10
DOIs
Publication statusPublished - Oct 2011

Keywords

  • Debye temperature
  • Heat of formation
  • Seismic velocities
  • Thermal diffusivity

ASJC Scopus subject areas

  • Condensed Matter Physics

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