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Table 4 Mineral saturation indices (SI) for thermal waters in the Şavşat Geothermal Field

From: Conceptual model of the Şavşat (Artvin/NE Turkey) Geothermal Field developed with hydrogeochemical, isotopic, and geophysical studies

Minerals Formula ILICAS CDMS SSSK CERDERY
Albite NaAlSi3O8 1.75 1.48 − 3.01 − 1.90
Anhydrite CaSO4 − 1.47 − 1.47 − 3.15 − 3.22
Aragonite CaCO3 0.69 0.00 − 0.20 − 0.07
Barite BaSO4 0.41 0.82 − 1.41
Ca-montmorillonite Ca0.165Al233Si367O10(OH)2 6.40 7.10 1.91 2.78
Calcite CaCO3 0.83 0.16 − 0.04 0.09
Celestine SrSO4 − 1.94 − 3.49 − 4.17 − 4.07
Dolomite CaMg(CO3)2 1.28 − 0.32 − 0.82 − 0.54
Fluorite CaF2 − 0.23 − 0.94 − 3.27 − 2.91
Gypsum CaSO4:2H2O − 1.33 − 1.21 − 2.90 − 2.96
Goethite FeOOH 6.24 3.38 7.54 8.10
Halite NaCl − 4.40 − 4.77 − 9.37 − 9.33
Hematite Fe2O3 14.55 8.70 17.01 18.13
Illite K0.6Mg0.25Al23Si35O10(OH)2 5.49 5.54 0.12 1.63
K-feldspar KAlSi3O8 2.31 2.33 − 2.62 − 0.85
K-mica KAl3Si3O10(OH)2 12.28 12.20 5.95 7.54
Kaolinite Al2Si2O5(OH)4 6.72 7.41 3.93 4.30
Amorphous silica SiO2 0.78 1.15 0.07 0.34
Rhodocrosite MnCO3 − 1.32 − 2.51
Siderite FeCO3 − 0.60 − 1.37 − 0.88 − 1.04
Talc Mg3Si4O10(OH)2 − 1.84 − 7.00 − 5.26 − 2.55
Witherite BaCO3 − 2.63 − 3.23 − 3.80