Crustal Fault Zones (CFZ) as Geothermal Power Systems: A Preliminary 3D THM Model Constrained by a Multidisciplinary Approach

Figure 14

(a) Three-dimensional conceptual model of the Pontgibaud CFZ as a geothermal reservoir potential. Details of the voids present at different scales and in which fluids can flow. (b) The procceses that may be at the origin of these voids (tectonic comminution, fluid-assisted brecciation, and basement alteration) are illustrated. (c) Comparison of the large-scale modeling results with field data shows that fluids could flow through a blob-like convective pattern and locate the 150°C isotherm at 2.3 km depth.

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