Publication Date:
2021-01-07
Description:
Bagni San Filippo area is characterized by the discharge of
thermal waters and deeply produced CO2-rich gases both from vents
and soil diffuse degassing. The thermal waters are the results of the
mixing between meteoric waters and hot fluids deriving from the
condensation, at depth, of vapours uprising from a deep hydrothermal
reservoir. This process gives rise to a relatively shallow thermal system
at temperature close to 50°C, characterized by SO4-rich and Cl-poor
waters and elevated PCO2 (~7 bar). Most of the incondensable gas of deep
originated vapour is released as a free gas phase forming cold gas vents
and localized spots of anomalous CO2 diffuse degassing. The location
and the shape of these degassing zones are strongly controlled by the
main tectonic structures of the area. Through detailed soil diffuse
degassing surveys and hydrogeochemical modelling, we estimate at
226-326 t d-1 and at 965 t d-1 the deep CO2 emission and the amount
of condensates discharged by the thermal springs, respectively. The
thermal energy associated to the process results at ~ 29 MW, most of
which (~ 25 MW) is associated with condensation occurring at depths
greater than groundwater circulation.
Description:
Published
Description:
383-397
Description:
1TR. Georisorse
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
