GNGTS 2022 - Atti del 40° Convegno Nazionale

462 GNGTS 2022 Sessione 3.2 from the higher emissive spots allowed to estimate the average background soil CO 2 emission (<5.5 g m -2 d -1 ) to be used as a reference to discriminate the amount of the gas reaching the surface via the structures. Conclusions. This multidisciplinary study allows us to characterize the tectonic architecture of the degassing area of the Solopaca spring. The 3D ERT survey well depicts the fault system defined by dominant NW-SE normal faults that act as preferred pathways for the upward migration of CO 2 gases. The CO 2 flux anomalies well-match with the mapped faults, in particular, the main degassing vent is located at the intersection between two major faults. Results indicate that in the Solopaca area, a deep CO 2 source is connected to the surface through NW-SE faults suggesting that a southward prolongation of the SMF system is possible. This feature has important implications for the evaluation of the seismic hazard for the area. References Ascione, A., Ciotoli, G., Bigi, S., Buscher, J., Mazzoli, S., Ruggiero, L., Sciarra, A., Tartarello, M.C., Valente, E., 2018: Assessing mantle versus crustal sources for non-volcanic degassing along fault zones in the actively extending southern Apennines mountain belt (Italy) . Geol. Soc. Am. Bull. 130 (9e10), 1697e1722. https://doi.org/10.1130/ B31869.1. Byrdina, S., Revil, A., Pant, S.R., Koirala, B.P., Shrestha, P.L., Tiwari, D.R., Gautam, U.P., Shrestha, K., Sapkota, S.N.,.Contraires, S., Perrier, F., 2009: Dipolar self-potential anomaly associated with carbon dioxide and radon flux at Syabru-Bensi hot springs in central Nepal . J Geophys Res, 114, B10101. Boncio, P., Auciello, E., Amato, V., Aucelli, P., Petrosino, P., Tangari, A.c., Jicha, B.R., 2022: Late Quaternary faulting in the southern Matese (Italy): implications for earthquake potential and slip rate variability in the southern Apennines . Solid Earth, 13, 553–582, https://doi.org/10.5194/se-13-553-2022. De Paola, C., Di Maio, R., Piegari, E., 2019: ERT and SP measurements for the characterization of fault-controlled soil CO 2 degassing . Proceedings of 25st European Meeting of Environmental and Engineering Geophysics, Near Surface Geoscience 2019, The Hague (The Netherlands), 8-12 September 2019, EarthDoc, Tu_25th_A03, 5 pp., doi: 10.3997/2214-4609.201902390. Di Maio, R., Salone, R., De Paola, C., Piegari, E., Vitale, S., 2021: 3D numerical simulations of non-volcanic CO 2 degassing in active fault zones based on geophysical surveys . Surveys in Geophysics, 42, 1443–1478, https://doi. org/10.1007/s10712-021-09666-0. Morelli, G., LaBrecque, D.J., 1996: Advances in ERT inverse modelling . Eur J Environ Eng Geophys, 1(2), 171–186. Pettinelli, E., Beaubien, S.E., Zaja, A., Menghini, A., Praticelli, N., Mattei, E., Di Matteo, A., Annunziatellis, A., Ciotoli, G., Lombardi, S., 2010: Characterization of a CO 2 gas vent using various geophysical and geochemical methods . Geophysics, 75, B137–B146. Vitale, S., Ciarcia, S., 2018: Tectono-stratigraphic setting of the Campania region (Southern Italy) . Journal of Maps 14(2), 9–21.