GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 3.2 461 Fig. 2 - 3D resistivity model of the study area. The black dashed line sketches a possible fault plane. CO 2 flux survey. CO 2 fluxes from the groundweremeasured in the blue dotted area in Fig. 1c. The data were determined by means of a static accumulation chamber connected to a portable device (Ecoprobe 5) equipped with an Infra-red analyzer and a pump working at variable rates. Measurements were made based on a grid where the position of the measurement stations was denser in correspondence with the ERT profiles. The hourly and daily flux of CO 2 were determined by applying a well-established method. Results in Fig. 3 showed how noticeable higher fluxes (> 39 g m -2 d -1 ) are detected along two main directions which fit well with the hypothesized underlying geological structures. In addition, the measurement made far away Fig. 3 - CO 2 flux map of the survey area, which is shown in Fig. 1c.