Cold meteoric waterMeteoric water infiltrates deep underground, where it is heated through interaction with magmatic intrusions. Driven by thermal buoyancyBuoyancy, the heated fluid ascends through permeable zonesConvection system. A Geothermal systemthree-dimensional geothermal convectionHydrological convection systemConvection system comprises a high-temperature zone and a recharge areaRecharge area. Within such systems, geothermal reservoirsGeothermal reservoir are hot and permeable layersPermeable layer that can be economically exploited to produce fluid or heat, typically found at depths of up to 3 km or more.