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Geothermal Energy

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Fig. 7 | Geothermal Energy

Fig. 7

From: Characterizing the physical properties of rocks from the Paleozoic to Permo-Triassic transition in the Upper Rhine Graben

Fig. 7

Thermal conductivity of all rocks investigated as a function of a total porosity, b permeability, and c P-wave velocity. All rocks are categorised as either sedimentary (red squares), crystalline basement (blue triangles), or other lithologies (black circles); see Table 2. Thermal conductivity, porosity, permeability and P-wave velocities shown are the mean values for each rock type; error bars indicate the standard deviation of each mean value

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