Hindawi Geofluids Volume 2018, Article ID 7014324, 20 pages https://doi.org/10.1155/2018/7014324 Research Article Near-Surface Geochemical Anomalies Integrated with Seismic and Well Data over the Contact of the Outer Carpathians and the Carpathian Foredeep (SE Poland) Henryk Sechman , Adrianna Góra, Anna Twaróg, Piotr Guzy, Ewelina Górska-Mruk, and Wojciech Górecki Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland Correspondence should be addressed to Henryk Sechman;
[email protected] Received 28 February 2018; Accepted 15 May 2018; Published 14 June 2018 Academic Editor: Julie K. Pearce Copyright © 2018 Henryk Sechman et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The objective of this study is to interpret the regularities in distribution of surface geochemical anomalies observed in a fragment of the contact zone between the Carpathian Fold-and-Thrust Belt and the Carpathian Foredeep (SE Poland). The surface geochemical survey included a total of 670 soil gas samples analyzed by gas chromatography, integrated with seismic cross sections, and supplemented by production data from wells. Maximum concentrations of methane, total alkanes C2-C5, total alkenes C2-C4, H2, and CO2 measured in soil gas samples were 27.1 vol.%, 45.3 ppm, 0.49 ppm, 0.232 vol.%, and 6.29 vol.%, respectively. Traces of alkanes detected in samples are the result of microseepage from a few accumulations of various compositions.