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Table 1 The concentrations of CH4, H2, CO and CO2 measured in the experiments

From: Formation of H2 and CH4by weathering of olivine at temperatures between 30 and 70°C

Substance

Temp

(°C)

Buffered solution

(nmol)

Water solution

(nmol)

CH4 initial

-

< 0.31

< 0.31

CH4 final

30

1.19 ± 0.018

0.89 ± 0.27

CH4 final

50

1.66 ± 0.26

1.21 ± 0.33

CH4 final

70

5.04 ± 1.18

3.36 ± 1.14

H2 initial

-

0.019 ± 0.8E-3

0.019 ± 0.8E-3

H2 final

30

5.93 ± 2.09

3.81 ± 0.35

H2 final

50

4.71 ± 0.19

3.61 ± 0.79

H2 final

70

5.08 ± 0.02

4.46 ± 1.41

CO final

30,50,70

detected

detected

CO2 final

30

201.60 ± 44.37

68.84 ±13.54

CO2 final

50

484.91 ± 179.56

118.76 ± 46.03

CO2 final

70

623.62 ± 122.56

319.25 ± 130.83

  1. No quantification of the CO data was made and the CO2 was measured only in the end of the experiments. Both CH4 and CO2 is temperature dependent whereas H2 is not.