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Geothermal Energy

Science – Society – Technology

Fig. 6 | Geothermal Energy

Fig. 6

From: Estimating in situ rock mass strength and elastic modulus of granite from the Soultz-sous-Forêts geothermal reservoir (France)

Fig. 6

(Modified from Genter and Traineau (1996))

Borehole log data from EPS-1 showing (from left to right): a stratigraphic log showing the altered (black) and relatively unaltered (grey) granite; fracture density (per metre); cumulative filling width (mm per metre); and the infilling type: quartz, hematite, calcite, and illite (shown as “low”, “medium”, or “high” content). Three 25 m-interval rock masses are labelled A, B, and C (see text and Fig. 3 for details)

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