Thermophysical properties of deep ocean sediments∗

Hadley, G. Ronald; McVey, D.F.; Morin, Roger H.

doi:10.1080/10641198409379847

Cited by 12 publications

(5 citation statements)

References 13 publications

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“…There is uncertainty as to the applicability of the models of Jaeger (1957Jaeger ( , 1958Jaeger ( , 1959Jaeger ( , 1961 which estimate the magnitude of temperature gradients inside and outside intrusive sheets. These assume steady state, whereas heat flow from magma during dynamic intrusion is a highly' complex process, controlled by the often different and variable thermophysical properties of magma and sediment (Delaney & Pollard 1981;Hadley et al 1981;Hickox et al 1981) as well as conduit geometry and distance from source. During intrusion, non-uniform temperature gradients are likely as a result of an irregular heat input which is difficult to quantify (T. J.…”

Section: Sediment Reconstitution and Bulk-interaction Of Sedimentmentioning

confidence: 99%

High-level emplacement of an olivine–dolerite sill into Namurian sediments near Cardenden, Fife

Walker

Francis

1987

Transactions of the Royal Society of Edinburgh: Earth Sciences

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Archival and recent boreholes over an area of c. 3 km2 have revealed complex magma-host interaction at the termination of an olivine–dolerite sill in Fife. The sill interior has zones rich in plastically deformed, vesiculated heterogeneous sediment surrounded by amygdaloidal basalt. Sediments at the contacts have been reconstituted and enclose blebs of chilled vesicular basalt. Intrusion into low rank coal seams has produced multicomponent tuffisite. A vertically nested and laterally fingered sill front is envisaged as having propagated down dip under a thin cover (<500 m) of wet Namurian sediments. Non-explosive bulk interaction of fluidised sediment and devolatilising magma occurred at intrusive contacts. Steam explosivity was more vigorous where lobes of magma repeatedly intruded moist lignite, to produce compositionally banded tuffisite rich in basalt clasts and coal fragments. The hydrovolcanic explosions did not give rise to surface eruptions because the low volumes of porewater and the high permeability and low tensile strength of the lignite prevented a build-up of high pressure steam.

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Section: Sediment Reconstitution and Bulk-interaction Of Sedimentmentioning

confidence: 99%

High-level emplacement of an olivine–dolerite sill into Namurian sediments near Cardenden, Fife

Walker

Francis

1987

Transactions of the Royal Society of Edinburgh: Earth Sciences

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“…The PTC model has the advantage of using clearly defined concepts to estimate the thermal conductivity of soil. In general, the air volume, moisture content, and particle density are represented by selecting the two indexes, porosity n and degree of saturation S r [38,39]. Thus, the PTC model is also expressed by:…”

Section: Parallel Theoretical Models (Wiener Model)mentioning

confidence: 99%

Estimating the Thermal Conductivity of Unsaturated Sand

Liu,

Gao,

2024

Applied Sciences

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A modified parallel model for estimating the thermal conductivity of unsaturated sand was proposed in this study. The heat conduction in the solid phase of sand depends mainly on the form of contacts between solid particles, while water bridges at the particle contacts increase the contact areas and remarkably enlarge the transfer paths of heat conduction in sandy soils. However, the thermal conductivity of the solid particle itself (λs) cannot describe the influence of the form of contacts and water bridges on heat conduction through the solid phase. In this study, the equivalent thermal conductivity of the solid particle (λes) was presented which reflected the influence of the form of contacts and water bridges between particles under dry conditions or a low degree of saturation, respectively. The relationship between λes and degree of saturation was described by hyperbolic expression. The modified model was calibrated using measured values of the thermal conductivity from published datasets, including those for 41 types of sand from 15 studies. Numerical analyses of the temperature field of the energy pile were performed and validated against laboratory measurements. The results illustrated that the modified model was more applicable than the original model for predictions of sand thermal conductivity.

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“…The thermal conductivity of soil also depends significantly on the arrangement of particles (Mcgaw, 1969;Hadley et al, 1984). Many models were used to predict the thermal conductivity (Mcgaw, 1969;Hadley et al, 1984), among which the series model which assumes perpendicular arrangement of conduction layers and the parallel model which assumes parallel arrangement of conduction layers allowed the lower and upper bounds of thermal conductivities to be defined, as follows:…”

Section: Thermal Conductivitymentioning

confidence: 99%

Anisotropic features of natural Teguline clay

Zhang

Cui

Zeng

et al. 2019

Engineering Geology

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In general, due to their geological formation by deposition, natural stiff clays exhibit anisotropic thermo-hydro-mechanical behaviour. This behaviour is important to be considered in geological and geo-environmental engineering. In this study, natural stiff Teguline clay was extracted at different depths and the thermal conductivity, compressibility and hydraulic conductivity were determined on samples along various orientations with respect to the bedding plane. Significant thermal and hydraulic conductivity anisotropies were evidenced with higher values along the bedding plane, indicating that both heat and water transfers preferentially occurred along the direction parallel to the bedding plane. Moreover, the compression index in the horizontal direction were found lower than in the vertical direction, while opposite phenomenon was observed for the yield stress. The degrees of thermal conductivity anisotropy ηΤ, compression index anisotropy ηCc1, yield stress anisotropy ησ ' y and hydraulic conductivity anisotropy ηk1 were found comparable, indicating that bedding is a good indicator of the inherent thermo-hydro-mechanical anisotropy for natural stiff clays. Upon loading in oedometer after the yield stress, the inherent anisotropy changed: for the vertical sample (loading direction normal to the bedding plane), loading led to more and more anisotropy, while for the horizontal sample (loading direction parallel to the bedding plane), the inherent anisotropy disappeared first; then, the induced anisotropy was developed. These findings provided useful information for analyzing the thermo-hydro-mechanical anisotropy of natural soils in geotechnical and geo-environmental engineering.

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Thermophysical properties of deep ocean sediments∗

Cited by 12 publications

References 13 publications

High-level emplacement of an olivine–dolerite sill into Namurian sediments near Cardenden, Fife

High-level emplacement of an olivine–dolerite sill into Namurian sediments near Cardenden, Fife

Estimating the Thermal Conductivity of Unsaturated Sand

Anisotropic features of natural Teguline clay

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