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Table 3 Composition and properties of the hydrothermal fluid sampled from production well GPK-2 at Soultz-sous-Forêts (France) in 2011.

From: The influence of hydrothermal brine on the short-term strength and elastic modulus of sandstones from exploration well EPS-1 at Soultz-sous-Forêts (France)

  Quantity
pH 5.5
Total dissolved solids (g/l) 97
Na (mg/l) 26,677
K (mg/l) 3220
Ca (mg/l) 6880
Mg (mg/l) 124
Cl (mg/l) 58,271
SO4 (mg/l) 177
SiO2 (mg/l) 226
Sr (mg/l) 397
Li (mg/l) 152
Br (mg/l) 264
NO3 (mg/l) < 0.5
F (mg/l) 1.9
PO4 (mg/l) 1.4
B (mg/l) 34.7
NH4 (mg/l) 21.4
Fe (mg/l) 27.6
Mn (mg/l) 14.8
Ba (mg/l) 19.4
As (mg/l) 8.3
Rb (mg/l) 23.5
Cs (mg/l) 14.6
Ge (μg/l) 50.2
Al (μg/l) 42
Zn (μg/l) 2163
Pb (μg/l) 254
Cd (μg/l) 5.8
Co (μg/l) 2.0
Cr (μg/l) 1.0
Cu (μg/l) 3.7
Ni (μg/l) 1.9
Ag (μg/l) 1.1