Articles | Volume 11, issue 4
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, Hugo Duwiquet, Gaëtan Launay, Audrey Taillefer, Vincent Roche, and Gaétan Link

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Cited articles

Achtziger-Putančič, P., Loew, S., Hiller, A., and Mariethoz, G.: 3D fluid flow in fault zones of crystalline basement rocks (Poehla-Tellerhaeuser Ore Field, Ore Mountains, Germany), Geofluids, 16, 688–710,, 2016. 
Achtziger-Putančič, P., Loew, S., and Hiller, A.: Factors controlling the permeability distribution in fault vein zones surrounding granitic intrusions (Ore Mountains/Germany), J. Geophys. Res., 122, 1876–1899,, 2017. 
Ague, J. J.: Fluid flow in the deep crust, Treatise on geochemistry, 2nd Edn., Elsevier, 203–247,, 2014. 
Andersen, C., Rüpke, L., Hasenclever, J., Grevemeyer, I., and Petersen, S.: Fault geometry and permeability contrast control vent temperatures at the Logatchev 1 hydrothermal field, Mid-Atlantic Ridge, Geology, 43, 51–54,, 2015. 
Artemieva, I. M., Thybo, H., Jakobsen, K., Sorensen, N. K., and Nielsen, L. S. K.: Heat production in granitic rocks: Global analysis based on a new data compilation GRANITE2017, Earth Sci. Rev., 172, 1–26,, 2017. 
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.