Sample

ID

Total Carbon

(%)

Organic Carbon

(%)

Inorganic Carbon

(%)

CaCO₃

(%)

Total Nitrogen

(%)

C/N Ratios

Molar

δ¹³c

(‰)

δ¹⁵N

(‰)

GKS 1

0.36

0.34

0.01

0.11

0.03

11.76

−22.79

0.72

GKS 2

3.60

3.56

0.04

0.36

0.25

16.39

−23.65

4.33

GKS 3

0.66

0.67

0.00

0.00

0.05

14.24

−21.50

3.12

GKS 4

0.64

0.66

0.00

0.00

0.06

13.05

−21.03

3.38

GKS 5

0.50

0.49

0.02

0.15

0.05

10.59

−19.96

2.47

GKS 6

1.35

1.29

0.06

0.50

0.13

11.89

−20.45

2.13

GKS 7

5.49

5.43

0.05

0.45

0.52

12.16

−20.91

1.03

GKS 8

1.94

2.07

0.00

0.00

0.20

11.79

−21.73

3.15

GKS 9

0.95

0.93

0.02

0.21

0.08

13.48

−24.30

4.78

GKS 10

0.35

0.32

0.03

0.23

0.03

11.03

−24.99

3.77