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Fig. 9 | Geothermal Energy

Fig. 9

From: Pore-fluid-dependent controls of matrix and bulk thermal conductivity of mineralogically heterogeneous sandstones

Fig. 9

Cross-plots of P-wave velocities vp (air-saturated samples) and bulk thermal conductivities (λb) of a air-saturated sandstone samples and b water-saturated sandstone samples, revealing a coefficient of determination R2 of 0.74 and 0.32. λb and vp are measured parallel to the orientation of the sedimentary stratification bedding. Samples containing > 85 vol.% total quartz are highlighted by a red x, as they plot as outliers

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