Thermophysical properties of dunite rocks as a function of temperature along with the prediction of effective thermal conductivity

Zeb, Aurang; Firdous, Tayyaba; Maqsood, Asghari

doi:10.4236/ns.2010.26077

Cited by 2 publications

(3 citation statements)

References 13 publications

(13 reference statements)

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“…Some of the initial data points are neglected to eliminate the effect of contact resistance. As far as measurement errors of this technique are concerned, the standard deviations in the measurements of thermal conductivity, thermal diffusivity, and specific heat capacity are 5%, 7%, and 10%, respectively [33][34][35][36].…”

Section: Methodsmentioning

confidence: 99%

Measurement and Prediction of Thermal Conductivity of Volcanic Basalt Rocks from Warsak Area

Zeb

Abid

Zeb

et al. 2020

Advances in Materials Science and Engineering

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Accurate values of thermal properties of rocks are needed for a number of engineering applications starting from heat losses in buildings to underground geothermal modeling. Igneous rocks are one of the major constituents of the Earth’s crust and are formed by the crystallization and solidification of molten magma. In this work, the thermal transport properties of porous igneous basalt rocks are measured using Transient Plane Source (TPS) technique under ambient conditions with air as saturant in pore spaces. Data are presented for fifteen samples of volcanic basalt rocks having different porosity values ranging from 0.267% to 9.432% by volume, taken from the place of Warsak near Peshawar city, located in the north of Pakistan. The porosity and density parameters are measured using the American Society of Testing and Materials (ASTM) standards. The mineral compositions of the samples are analyzed by X-ray fluorescence (XRF) technique. The specific gravity is predicted using the chemical composition of basalts and is compared with the experimental results. The thermal conductivity and thermal diffusivity values of the measured samples are also predicted using the mixing law and empirical models and results are compared with the measured data. Results show that the thermal conductivity of the studies of basalt samples decreases with the increase in porosity values, whereas no significant change has been observed in the thermal diffusivity data. Measured data are significant for geothermal modeling and in predicting heat losses in buildings wherever basalt rocks are used.

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Section: Methodsmentioning

confidence: 99%

Measurement and Prediction of Thermal Conductivity of Volcanic Basalt Rocks from Warsak Area

Zeb

Abid

Zeb

et al. 2020

Advances in Materials Science and Engineering

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“…5a), Paleozoic and metamorphic rocks of the southern fore-Sudetic monocline (unit Cc), Permian rocks of the northern fore-Sudetic monocline (unit B4), Cenozoic, Triassic and Carboniferous rocks of the Upper Silesian block (unit Cb), Flysch complex in the Inner Carpathians (unit Dc), as well as chosen magmatic rocks of the crystalline basement. Figure 6 shows experimental thermal conductivity data λ for the area of Poland (green squares) compiled from Chmura (1970Chmura ( , 1987, Downorowicz (1983), Plewa (1988), Plewa and Plewa (1992) and shows for comparison abroad data (red circles) compiled from Moisiejev and Smyslov (1986), Eppelbaum et al (2014), Sharma (2002), Kappelmeyer and Hänel (1974), Dortman (1976), Zeb et al (2010), Blackwell and Steele (1989), Clark (1966). Values shown by grey horizontal bars were used for modeling in Model D. Grey dotted lines show a range of values, basically between about 1 and 4 W/m°C, slightly increasing with rock depth/age.…”

Section: Heat Flow and Thermal Parametersmentioning

confidence: 99%

“…(1) Chmura (1970Chmura ( , 1987, Downorowicz (1983), Plewa (1988), Plewa and Plewa (1992), Bała and Waliczek (2012). Values shown by grey horizontal bars and corresponding values in the top of figure were used for modeling in Model D. For comparison red circles show abroad data compiled from Moisiejev and Smyslov (1986), Eppelbaum et al 2014, Sharma (2002), Kappelmeyer and Hänel (1974), Dortman (1976), Zeb et al (2010), Blackwell and Steele (1989), Clark (1966). Grey dotted lines show a range of values, basically between about 1 and 4 W/m°C, slightly increasing with rock depth…”

Section: Heat Flow and Thermal Parametersmentioning

confidence: 99%

Thermal properties of the crust and the lithosphere–asthenosphere boundary in the area of Poland from the heat flow variability and seismic data

Majorowicz

Polkowski

Grad

2019

Int J Earth Sci (Geol Rundsch)

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High-resolution 3D seismic P-wave velocity model of Poland (Grad et al., Tectonophysics 666:188-210, 2016) and corrected for paleoclimate heat flow map (Majorowicz and Wybraniec, Int J Earth Sci 100(4):881-887, 2011) gridded to a common mesh are used together with four independent thermal models of the crust and upper mantle to calculate heat flow variation with depth and geotherms. Heat flow at Moho depth are calculated and mapped and both confirm large variability with an elevated mantle heat flow (circa 30-40 mW/m 2) in the Paleozoic Platform which is some 10-20 mW/m 2 higher than Moho heat flow in the northeastern and southeastern Poland which belong to a variety of tectonic terranes (the oldest Precambrian Craton, younger Cadomian, Trans-European Suture Zone, Carpathians). Temperatures calculated for the crust show consistent pattern: higher temperatures beneath the Paleozoic Platform and lower temperatures beneath the Precambrian and Cadomian units. At 10 km depth this difference is about 150 °C, about 300 °C at 20 km depth, and about 400 °C at 50-60 km. Assuming the calculated isotherm 580 °C as Curie temperature the magnetic crust thickness was determined as 5-10 km only beneath the Polish Basin, circa 20 km in Carpathians, circa 30 km in Sudetes, and 35-40 km beneath the Precambrian and Cadomian units. Such a thick magnetic crust results from a great depth of Curie temperature, thick crystalline crust, and thin sediments. Mantle heat flow variability is mainly correlating with measured surface heat flow and influences geotherms. Calculated thermal LAB depth follows patterns of heat flow and Moho heat flow variability through Poland with thinnest lithosphere in the high surface heat flow and high mantle heat flow areas. Comparison of this thermal LAB depth estimates with seismic data based LAB depth shows general coincidences when Precambrian Craton vs Paleozoic Platform are considered along the P4 seismic experiment data model (circa 190 km depth vs some 90 km depth, respectively). However, significant differences exist in many areas and especially for the SE Poland when compared with map for the whole of Poland compiled from other seismic reported data.

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Thermophysical properties of dunite rocks as a function of temperature along with the prediction of effective thermal conductivity

Cited by 2 publications

References 13 publications

Measurement and Prediction of Thermal Conductivity of Volcanic Basalt Rocks from Warsak Area

Measurement and Prediction of Thermal Conductivity of Volcanic Basalt Rocks from Warsak Area

Thermal properties of the crust and the lithosphere–asthenosphere boundary in the area of Poland from the heat flow variability and seismic data

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