Demonstrating large-scale cooling in a Variscan terrane by coupled groundwater and heat flow modelling

摘要: Abstract Heat flow shifts between 20 and 60 mW/m 2 in the upper ∼2 km of crust 60 to 150 mW/m at greater depth have been observed Soumagne, Havelange Grand-Halleux deep wells, all located close Variscan thrust front Belgium. We gathered geologic, hydrogeologic, thermal paleoclimatic data used them perform large-scale 2-D coupled hydro-geothermal modelling current temperature heat distribution area. Calibration models was performed with from three requires considerable variations basal or production. Model results several scenarios including different processes confirm that cooling by groundwater is dominant control on shift boreholes; influence, both pervasive along major conduits, rivalled influence only well. The effect less than 0.5 Myr controlled present geomorphology.