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Table 1 Chemical composition and stable isotope contents of waters in the study area (Bürchau, B1-4, Badenweiler, B5): results for the two sampling campaigns in June and July 2013 and earlier studies

From: Hydrochemical characterisation of a major central European heat flux anomaly: the Bürchau geothermal spring system, Southern Black Forest, Germany

Spring

B1

B2

B3

B4

B5

B1 Schmassmann et al. ( 1984 )

B1 Carlé ( 1975 )

 

JUN13

JUL13

JUN13

JUL13

JUN13

JUL13

JUN13

JUL13

JUN13

JUL13

1981 to 1983

1958

Temperature [°C]

15.1

18.1

9.3

9.7

-

-

8.3

-

18.7

20.4

16.8

-

Conductivity [μS cm−1]

152

149

49

61

49

46

46

55

429

420

-

-

O2 concentration [%]

62

66

92,8

77

105

97

98

90

72

71

-

-

Redox potential [mV]

221

245

294

270

-

290

242

237

227

252

-

-

pH

7.45

7.5

6.7

6.8

7.2

6.3

7.4

7.2

7.6

7.7

8.06

6.8

δ18O [‰]

−9.77

−10.25

−9.82

−10.1

-

−10.6

-

−10.12

−9.58

−10.1

−9.86

-

δ2H [‰]

−68.1

−68.7

−68.9

−68.4

-

−70.9

-

−68.0

−67.4

−69.2

−69.5

-

δ34S [‰] (from BaSO4 precipitation)

5.11

5.00

-

4.12

-

-

-

-

12.88

12.95

-

-

δ18O [‰] (from BaSO4 precipitation)

3.72

3.61

-

3.17

-

-

-

-

6.04

5.88

-

-

Amount [mg L−1]

            

 Na

15.0

15.4

2.88

2.88

-

2.14

-

3.66

31.4

33.3

14.9

11.7

 K

1.21

1.21

0.55

0.54

-

0.33

-

0.6

3.1

3.27

1.21

-

 Ca

14.6

15.3

4.55

6.88

-

5.37

-

5.72

46.9

54.8

33.3

12.6

 Mg

1.21

1.3

0.85

1.33

-

1.11

-

0.84

6.58

7.16

2.80

3.7

 Li

0.0405

0.0419

0.0009

0.0011

-

0.0006

-

0.0007

0.134

0.138

0.048

-

 Sr

0.155

0.181

0.028

0.042

-

0.042

-

0.03

0.455

0.487

0.298

-

 Cl

1.85

1.79

3.3

3.59

-

1.48

-

3.73

8.58

8.93

1.91

4.5

 HCO3

85.4

79.3

18.3

24.4

-

42.7

-

42.7

159

165

71.0

67.1

 SO4

12.0

12.1

2.89

3.32

-

2.36

-

2.99

67.9

67.8

23.8

12.3

 F

1.85

1.9

0.13

0.23

-

0.2

-

0.12

0.82

0.8

1.86

-

 SiO2

-

22.3

-

4.1

-

4.4

-

5.3

-

19.6

23.8

7.5

Amount [μg L−1]

            

 B

14.2

13.6

2.73

2.68

-

2.61

-

2.74

162.9

164

-

-

 Fe

1.32

2.32

2.51

1.59

-

1.78

-

10.7

2.03

2.39

-

-

 Cu

0.17

0.27

0.15

0.14

-

0.17

-

0.37

3.09

3.58

-

-

 Zn

1.03

1.9

1.59

2.37

-

1.88

-

1.85

98.6

96.4

-

-

 As

62.3

64.2

4.97

5.2

-

1.91

-

4.8

101.5

104

-

-

 Rb

6.67

8.12

2.29

2.67

-

1.74

-

2.29

15.6

17.1

-

-

 Mo

1.66

1.65

0.05

0.1

-

0.05

-

0.08

1.34

1.33

-

-

 Cs

2.65

3.92

0.7

0.82

-

0.54

-

0.38

14.29

15.1

-

-

 U

6.51

7.1

0.09

0.14

-

0.03

-

0.12

5.59

5.79

-

-

 Ba

156

187

254

333

-

199

-

75.6

56.7

59.5

-

-

TDS [mg L−1]

135

153

35.6

49.8

-

61.7

-

67.8

328

365

-

-