Articles | Volume 11, issue 4
Solid Earth, 11, 1571–1595, 2020
https://doi.org/10.5194/se-11-1571-2020

Special issue: Faults, fractures, and fluid flow in the shallow crust

Solid Earth, 11, 1571–1595, 2020
https://doi.org/10.5194/se-11-1571-2020
Research article
26 Aug 2020
Research article | 26 Aug 2020

On the morphology and amplitude of 2D and 3D thermal anomalies induced by buoyancy-driven flow within and around fault zones

Laurent Guillou-Frottier et al.

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Latest update: 03 Dec 2022
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Short summary
In the first kilometers of the subsurface, temperature anomalies due to heat conduction rarely exceed 20–30°C. However, when deep hot fluids in the shallow crust flow upwards, for example through permeable fault zones, hydrothermal convection can form high-temperature geothermal reservoirs. Numerical modeling of hydrothermal convection shows that vertical fault zones may host funnel-shaped, kilometer-sized geothermal reservoirs whose exploitation would not need drilling at depths below 2–3 km.