The effect of pressure on the thermal conductivity of silicate rocks up to 12 kbar

Hôrai, Ki-iti; Susaki, Junichi

doi:10.1016/0031-9201(89)90077-0

Cited by 81 publications

(51 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both equations will be used as end members for the thermal conductivity correction. Pressure effects on thermal conductivity of rocks are much smaller than temperature effects in the pressure ranges expected for Hole 857C, as indicated by results for crystalline quartz (Horai and Susaki, 1989). Therefore, pressure effects on thermal conductivity will be ignored throughout this work.…”

Section: Thermal Conductivity Models and Datamentioning

confidence: 84%

Estimating In-Situ Thermal Conductivity from Log Data

Villinger¹,

Langseth²,

Gröschel-Becker³

et al. 1994

Proceedings of the Ocean Drilling Program, 139 Scientific Results

View full text Add to dashboard Cite

Hole 857C, drilled in Middle Valley, northern Juan de Fuca Ridge, during Leg 139 of the Ocean Drilling Program, penetrated about 470 m of turbidite sediments. Below the sediments the hole intersected a series of basaltic sills interbedded with sediments. Hole 857C is located south of an active hydrothermal vent field in an area where seafloor heat flow measurements show values exceeding 0.8 W/m 2 . This hole was successfully logged with the seismic and lithodensity tool string. Open-hole temperatures at a depth of 480 mbsf are as high as 222°C. The porosity profile of Hole 857C, based on log-derived wet-bulk densities, forms the basis for the calculation of a thermal conductivity profile using a binary mixture of sediment grains and seawater and a geometric mean model. The thermal conductivity of the grains is assumed to be 2.6 W/m-K (Davis and Seeman, this volume). High temperatures encountered in Hole 857C require that temperature effects on the thermal conductivity must be included. The variation of the thermal conductivity of seawater is well known. The decrease of the thermal conductivity of the grains with increasing temperature is calculated after Sass et al. (1992) and Chapman et al. (1984). A purely conductive vertical heat flow is assumed to allow the iterative modeling procedure caused by the nonlinear nature of the problem. The model calculations show that the results of a simple model with constant thermal parameters are similar to those of a model that includes a temperature-dependent seawater thermal conductivity and temperature coefficient of the grain thermal conductivity after Sass et al. (1992). This surprising result is a consequence of the competing effects of decreasing porosity with depth, decreasing thermal conductivity of the grains with depth (and temperature), and the variation of the thermal conductivity of seawater with temperature. Results based on temperature corrections of Chapman et al. (1984) give unrealistically high temperatures at the base of the sediments. Varying the grain thermal conductivity between 2.6 and 3.2 W/m-K results in a range of thermal conductivity profiles that predict temperatures that are in agreement with observed vent fluid temperatures.

show abstract

Section: Thermal Conductivity Models and Datamentioning

confidence: 84%

Estimating In-Situ Thermal Conductivity from Log Data

Villinger¹,

Langseth²,

Gröschel-Becker³

et al. 1994

Proceedings of the Ocean Drilling Program, 139 Scientific Results

View full text Add to dashboard Cite

show abstract

“…Such problems artificially elevate the pressure derivative. Results for fused silica and quartz (56) are omitted from analysis because these have much higher derivatives than measurements by Kieffer et al (57), wherein the samples cracked.…”

Section: Do Contact Measurements Providementioning

confidence: 99%

Pressure dependence of thermal transport properties

Hofmeister¹

2007

Proc. Natl. Acad. Sci. U.S.A.

119

View full text Add to dashboard Cite

Pressure (P) derivatives of thermal conductivity (k) and thermal diffusivity (D) are important to geophysics but are difficult to measure accurately because minerals, being hard and partially transparent, likely incur systematic errors through thermal losses at interfaces and spurious radiative transfer. To evaluate accuracy, repeat experiments for olivine [(Mg0.9Fe0.1)2SiO4], quartz (SiO2), and NaCl are examined in detail: these and other data on electrical insulators are compared with theory. At ambient conditions, D is underestimated in proportion to the number of contacts. As temperature (T) increases, spurious radiative transfer more than offsets contact loss. Compression of pore space and contact losses affect pressure derivatives, but these seem independent of T. Accurate (؎2%) values of D(T) at 1 atm are obtained with the contact-free, laser-flash method. Other optical techniques do not pinpoint D but provide useful pressure derivatives. Published data on ٢(lnk)/٢P at ambient conditions agree roughly with all available models, the simplest of which predicts ٢(lnk)/٢P ϳ ٢(lnKT)/٢P, where KT is the bulk modulus. However, derivatives verified by multiple measurements are reproduced accurately only by the damped harmonic oscillator model. An improved database is needed to refine this model and to confidently extrapolate these difficult measurements to geophysically relevant conditions. laser-flash analysis ͉ thermal conductivity T hermal transport properties play a crucial role in mantle convection, because this phenomenon results from competition between diffusion of heat, resistance to motion, and buoyancy forces. Thermal conductivity (k) and its relative thermal diffusivity,where is density and C P is heat capacity at constant pressure (P), are regulated by two different mechanisms. Transport of heat by phonons is termed lattice conductivity (k lat ). For electrical insulators such as mantle minerals, photons also move heat. Radiative transfer inside Earth proceeds by diffusion among the grains and is calculated from spectroscopic measurements (e.g., ref. 1). In contrast, laboratory experiments involve direct (also called boundaryto-boundary) radiative transfer wherein photons emitted from heater warm the thermocouple with minimal participation of the sample, because most electrical insulators are transparent at certain frequencies (1-3). This effect is not easily separated from k lat . Recent advances made in measurement of D using the contact-free, laser-flash technique (4, 5) allow removal of unwanted direct radiative transfer effects from the raw data. Their approach was recently applied to Earth materials at T but not at P (6-9). Pressure studies of k lat (or D) predominately involve conventional, contact methods (e.g., refs. 10-12), which potentially include simultaneous but opposing errors due to direct radiative transfer and contact resistance at interfaces (e.g., refs. 13 and 14). This report uses laser-flash results and the existing database to decipher meaningful values of Ѩk lat /ѨP. Single cr...

show abstract

“…Generally, with increasing temperature, k decreases, whereas Cp increases. Conversely, thermal conductivity tends to increase with increasing pressure (Horai and Susaki, 1989;Seipold, 1992, Kukkonen et al, 1999Osako et al, 2004;Abdulagatov et al, 2006;Hofmeister, 2007). However, the pressure effect is limited compared to the influence of temperature (Abdulagatov et al, 2006).…”

Section: Temperature and Pressure Dependencesmentioning

confidence: 99%

“…Beyond ~ 100 MPa, k tends to reach a linear behaviour (Horai and Susaki, 1989;Clauser and Huenges, 1995;Abdulagatov et al, 2006), and is supposed to evolve following the thermodependence law appropriate for the considered lithology.…”

Section: Temperature and Pressure Dependencesmentioning

confidence: 99%

“…Various experiments have been realised and some empirical laws have been proposed in order to define the thermal dependence of the thermal conductivity k (Zoth and Hänel, 1988;Horai and Susaki, 1989;Clauser and Huenges, 1995;Seipold, 1998;Voosten and Schellschmidt, 2003;Abdulagatov et al, 2006;Whittington et al, 2009) and heat capacity Cp (Waples and Waples, 2004;Whittington et al, 2009). Generally, with increasing temperature, k decreases, whereas Cp increases.…”

Section: Temperature and Pressure Dependencesmentioning

confidence: 99%

See 1 more Smart Citation

Major role of shear heating in intracontinental inverted metamorphism: Inference from a thermo-kinematic parametric study

2013

View full text Add to dashboard Cite

role of shear heating in intracontinental inverted metamorphism: Inference from a thermo-kinematic parametric study. Tectonophysics, Elsevier, 2013, 608, pp.812-831. 10.1016/j.tecto.2013 1 Major role of shear heating in intracontinental inverted metamorphism:Inference from a thermo-kinematic parametric study. AbstractInverted metamorphism corresponds to the stacking of high-temperature metamorphic units structurally on top of lower-temperature units and is commonly observed along main thrusts in major orogens. Yet, in spite of many existing models, the origin and preservation of the metamorphic inversion in intracontinental collision belts is still debated. In this study, we use a crustal-scale 2D thermo-kinematic model in order to investigate the key parameters controlling the inversion of the geothermal gradient at crustal scale. Our results confirm that the kinematic framework strongly impacts the thermal evolution around the thrust. Erosion velocity and thermal conductivity of rocks are two parameters that control the spatial location of the thermal perturbation and the intensity of inversion, respectively. However, even in extreme kinematic configurations, i.e., convergence velocities > 3cm.yr 3

show abstract

The effect of pressure on the thermal conductivity of silicate rocks up to 12 kbar

Cited by 81 publications

References 12 publications

Estimating In-Situ Thermal Conductivity from Log Data

Estimating In-Situ Thermal Conductivity from Log Data

Pressure dependence of thermal transport properties

Major role of shear heating in intracontinental inverted metamorphism: Inference from a thermo-kinematic parametric study

Contact Info

Product

Resources

About