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

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Oman
heat of formation
thermal diffusivity
minerals
diffusivity
rocks
olivine
Papua New Guinea
temperature dependence
specific heat
temperature
room temperature

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Thermal diffusivity and heat of formation of harzburgite and its major constituent minerals",
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.",
keywords = "Debye temperature, Heat of formation, Seismic velocities, Thermal diffusivity",
author = "Sayyadul Arafin and Singh, {Ram N.} and George, {Abraham K.}",
year = "2011",
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language = "English",
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AU - Arafin, Sayyadul

AU - Singh, Ram N.

AU - George, Abraham K.

PY - 2011/10

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N2 - 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.

AB - 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.

KW - Debye temperature

KW - Heat of formation

KW - Seismic velocities

KW - Thermal diffusivity

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