Near-Surface Geochemical Anomalies Integrated with Seismic and Well Data over the Contact of the Outer Carpathians and the Carpathian Foredeep (SE Poland)

Table 6

Pearson correlation coefficients of principal components analyzed in soil gas samples.

Component	Methane	Total C2-C5 alkanes	Total C2-C4 alkenes	Carbon dioxide	Hydrogen	Oxygen
Methane	1	0.54; (491)	0.36; (390)	0.02; (670)	0.19; (298)	−0.24; (670)
Total C2-C5 alkanes		1	0.62; (327)	0.01; (491)	0.55; (275)	0.04; (491)
Total C2-C4 alkenes			1	−0.07; (390)	0.25; (205)	0.05; (390)
Carbon dioxide				1	−0.08; (298)	−0.49; (670)
Hydrogen					1	−0.01; (298)
Oxygen						1

The numbers in brackets indicate the numbers of samples included in the calculation.