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Swiss Journal of Geosciences

Table 4 Overview of biomarker ratios determined in this study

From: Origins of hydrocarbons in the Geneva Basin: insights from oil, gas and source rock organic geochemistry

Well

Depth

Stratigraphic age

TOC (%)

Pr/Ph

Pr/nC17

Ph/nC18

TAR

CPI

C29

norHop/C30 Hop

C31 Hop

22S/(22R + 22S)

St C27

St C28

St C29

Humilly-2

2232

Toarcian

1.56

1.94

0.38

0.33

-

-

-

-

-

-

-

Humilly-2

2236

1.53

2.06

0.83

0.63

-

-

0.34

0.58

34.69

23.79

41.52

Humilly-2

2238

4.32

1.51

0.76

0.75

0.04

1.38*

0.37

0.57

31.37

27.59

41.03

Humilly-2

2240

4.29

1.42

0.69

0.65

0.03

-

0.30

0.66

34.96

24.65

40.39

Humilly-2

3038.8

Carb

1.12

1.53

0.61

0.48

0.93

1.06

-

-

35.66

33.25

31.09

Humilly-2

3040.7

1.11

0.88

0.63

0.66

2.5

1.05

-

-

35.15

33.5

31.35

Chatillon-1D

1578.5

Carb

8.24

1.06

0.97

1.09

0.15

1.27

0.38

0.57

29.13

20.27

50.61

Charmont-1

1892

Carb

31.81

6.88

4.04

0.58

0.15

1.48*

0.87

0.58

21.46

16.35

62.19

Charmont-1

1894

54.85

6.75

2.08

0.32

0.28

1.74*

0.83

0.58

23.39

20.70

55.91

Charmont-1

2108.5

57.33

6.23

2.30

0.41

0.03

-

1.09

0.58

21.81

24.66

53.53

Chapeiry-1

3669

Toarcian

3.52

1.76

0.51

0.42

0.01

-

-

-

-

-

-

Chapeiry-1

3720.9

1.39

1.26

1.59

1.18

0.24

1.48

0.74

0.60

42.22

28.29

29.49

Chapeiry-1

3722.7

3.29

0.87

0.60

0.62

0.44

1.13

0.73

0.58

48.94

19.43

31.63

Chapeiry-1

3728.8

4.15

1.23

0.44

0.41

0.13

1.11

0.35

0.61

36.66

25.15

38.19

Roulave bitumen

Surface

-

-

0.62

3.05

40.45

0.15

-

0.31

0.57

36.04

24.38

39.58

Satigny bitumen

Surface

-

-

-

-

-

-

-

0.39

0.42

-

-

-

Satigny bitumen

Surface

-

-

-

-

-

-

-

0.31

0.5

-

-

-

  1. Pr pristine, Ph phytane, TAR Terrigenous Aquatic Ratio, CPI Carbon Preference Index, Hop hopane, Str sterane
  2. *CPI25-29 value
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