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Table 3 Major hydrothermal and petrothermal reservoirs

From: Exploration for deep geothermal reservoirs in Luxembourg and the surroundings - perspectives of geothermal energy use

Stratigraphy

Mesozoic

Permian

Devonian

Devonian

Buntsandstein

Rotliegend

Upper+Middle Siegenian

Lochkovian

Region

Trier-Luxembourg Embayment

SE-Luxembourg Graben + Wittlicher Senke

Hunsrück (+Mosel region?)

Ardennes (+NW Eifel?)

Formations

Voltziensandstein+Zwischenschichten+Vogesensandstein

Altrich+Kinderbeuern+Ãœrzig

Taunusquarzit

Saint-Hubert+Oignies+Fépin

Reservoir lithotype

Sandstone+conglomerate

Sandstone+breccia/conglomerate

Quartzite

Sandstone+quartzite

Reservoir type

Hydrothermal

Hydrothermal/petrothermal

Petrothermal

Petrothermal

Depth [m]

0 to 1,200

0 to 2,500

0 to 4,000

3,500 to 6,000

Thickness [m]

150 to 300

>1,000

>1,000

1,300 to 2,500

T [°C]

10 to 50

10 to 75

10 to 90

90 to 140

k f [m s–1]

10–4 to 10–7

10–4 to 10–9

10–5 to 10–7

10–5 to 10–7

  1. T - temperature, k f - hydraulic conductivity.