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Table 1 The statistical data of soil gas concentrations in the seismic fault zone

From: Geochemistry of soil gas in the seismic fault zone produced by the Wenchuan Ms 8.0 earthquake, southwestern China

Soil gas

Number of samples

Range

Mean

SD

He(ppm)

828

~40

8

4

H2(ppm)

828

~279.4

16

25

N2(%, v/v)

828

54.5~85.8

76.6

3.2

O2(%, v/v)

828

11.2~22.5

19.1

1.9

CO2(%, v/v)

828

0.03~6.70

0.63

0.6

Rn(k Bq/m3)

828

0.1~61.3

8.4

8.6

Hg(ng/m3)

828

0~122

9.4

9.3

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Geochemical Transactions

ISSN: 1467-4866

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