Table 1 Geochemical description of sediment samples from Sites E26, E29, and E44

From: Metabolic potential of uncultured bacteria and archaea associated with petroleum seepage in deep-sea sediments

Core ID

Site E26

Site E29

Site E44

Latitude (N)

26.59

27.43

26.28

Longitude (W)

87.51

86.01

86.81

Water depth (km)

2.8

3.2

3.0

TSF Max

57,326.7

26,738.3

13,502.3

UCM (μg g−1)

32

13

7.3

Σn-Alkanes (ng g−1)

2845.3

2527

1045

T/D ratio

1.0

2.6

0.8

ΣAlkane gas (ppm)

9

36,012

9.9

C2+ Alkanes (ppm)

0.3

17.5

0.5

C1/(C2 + C3)

NA

3974.2

NA

δ13CH4 (‰, vs. PDB)a

NA

−85.1

NA

  1. TSF Max total scanning fluorescence maximum intensity. UCM unresolved complex mixture. Σn-Alkanes sum of C15−C34 n-alkanes. ΣAlkane Gas total alkane gases. C2+ Alkanes sum of alkane gases larger than methane. T/D thermogenic/diagenetic n-alkane
  2. a The δ13CH4 values in Sites E26 and E29 could not be determined due to low methane concentration, which can be approximated by subtracting C2+ Alkanes from ΣAlkane Gas
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