Near-Surface Geochemical Anomalies Integrated with Seismic and Well Data over the Contact of the Outer Carpathians and the Carpathian Foredeep (SE Poland)
Table 4
Principal statistical parameters of alkane concentrations in analyzed soil gas samples.
Statistical parameters
Alkanes (ppm)
Total alkanes C2-C5
CH4
C2H6
C3H8
i-C4H10
n-C4H10
neo-C5H12
i-C5H12
n-C5H12
Minimum (ppm)
0.7
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
Maximum (ppm)
271000.0
45.2
3.6
0.52
5.53
0.01
0.4
0.05
45.3
Median (ppm)
2.0
0.02
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
b.d.l.
0.02
Mean (ppm)
576.4
0.10
0.01
b.d.l.
0.01
b.d.l.
b.d.l.
b.d.l.
0.13
Standard deviation (ppm)
11250.3
1.75
0.14
0.02
0.22
b.d.l.
b.d.l.
b.d.l.
1.79
Skewness (ppm)
22.1
25.8
24.6
22.3
25.4
13.4
19.0
16.3
24.3
Percentage of samples (%)
100.0
71.8
25.8
4.6
8.4
0.6
0.45
0.7
73.3
Percentage of samples with concentration of a given component over the detection limit; b.d.l.: below detection limit.
