Table 4 Diversity studies on deep geothermal fluids or deposits in side geothermal power plants

Molasse Basin (DE)

61–103 °C

NA

6.6–7.3

salinity 600–900 mg/l; DOC: 6.4–19.3 mg C/l

Fluids

X

X

(Alawi et al. 2011)

Bruchsal (DE)

132 °C (deepest drilling point)

2500 m

5.4–5.8

2.2 MPa (inside drilling pipes)

Biofilms

X

(Filippidou et al. 2016)

Gross Schönebeck (DE)

150 °C (reservoir)

4200 m

5.5 at 25 °C

Deposits

X

(Filippidou, Jaussi, et al. 2015; Filippidou et al. 2016)

Bad Blumau (AT)

107 °C

2800 m

8

salinity 20 g/l; sulfate 500 mg/l

Fluids

X

X

(Westphal et al. 2019)

Neubrandenburg (DE)

45–54 °C or 65–85 °C

1250–1335 m

6

mineralization 131 g/l; DOC 3.5 g/l

Fluids (different sources) and filter samples

X

(Lerm et al. 2013)*

Berlin (DE)

6–30 °C

30–60 m

7

low salinity (< 1 g/l)

Fluids (different sources) and filter samples

X

(Lerm et al. 2011)*

Northest Germany (DE)

 > 120 °C

3500 m

5.5–5.9

salinity up to 420 g/l; 20 MPa

Fluids

X

(Morozova, Zettlitzer et al. 2011)*

Otake (JP)

75–90 °C

NA

NA

NA

Silica scale in an aging tank of geothermal hot water

X

(Inagaki et al. 1997; Inagaki et al. 2003)

Hatchobaru (JP)

In situ: 250 °C, collected at 96 °C

1500 m

NA

NA

Fluids; production well

X

(Takai, Komatsu and Horikoshi 2001)**

Hatchobaru (JP)

In situ: 250 °C, collected at 96 °C

1500 m

NA

NA

Fluids; production well

X

(Takai and Horikoshi 1999)

Otake (JP)

NA

NA

NA

NA

Silica scale

X

(Fujino et al. 2008)

Melun-L'Almont (FR)

70 °C

2000 m

6.4

DOC 2.3 mg/L

Fluids

X

X

(Fardeau et al. 2009)

Pyrzyce (PL)

61 °C

1640 m

6.2

TDS 121 g/L

Fluids

X

X

(Kalwasińska et al. 2020)

Stargard (PL)

85 °C

2578 m

5.9

TDS 140 g/L

Fluids

X

X

(Kalwasińska et al. 2020)

Otaniemi (FI)

46–76 °C

3203 m to 4375 m

NA

NA

Fluids

X

(Purkamo et al. 2020)