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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