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Authors: Saroli, M.* 
Lancia, M.* 
Albano, M.* 
Casale, A.* 
Giovinco, G.* 
Petitta, M.* 
Zarlenga, F.* 
dell'Isola, M.* 
Title: A hydrogeological conceptual model of the Suio hydrothermal area (central Italy)
Journal: Hydrogeology Journal 
Series/Report no.: 6/25 (2017)
Publisher: Springer-Verlag Germany
Issue Date: 17-Mar-2017
DOI: 10.1007/s10040-017-1549-5
Keywords: Karst
Conceptual model
Thermal conditions
Subject Classification03. Hydrosphere::03.02. Hydrology::03.02.02. Hydrological processes: interaction, transport, dynamics 
03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes 
Abstract: A hydrogeological conceptual model has been de- veloped that describes the hydrothermal system of Suio Terme (central Italy). The studied area is located along the peri- Tyrrhenian zone of the central Apennines, between the Mesozoic and Cenozoic carbonate platform sequences of the Aurunci Mountains and the volcanic sequences of the Roccamonfina. A multi-disciplinary approach was followed, using newhydrogeological surveys, the interpretation of strat- igraphic logs of boreholes and water wells, and geophysical data—seismic sections, shear-wave velocity (Vs) crustal mod- el and gravimetric model. The collected information allowed for construction of a conceptual hydrogeological model and characterization of the hydrothermal system. The Suio hydro- thermal system is strongly influenced by the Eastern Aurunci hydrostructure. Along the southeastern side, the top of the hydrostructure sinks to −1,000 m relative to sea level via a series of normal faults which give origin to the Garigliano graben. Geological and hydrogeological data strongly suggest the propagation and mixing of hot fluids, with cold waters coming from the shallow karst circuit. The aquitard distribution, the normal tectonic displacements and the frac- turing of the karst hydrostructure strongly influence the hy- drothermal basin. Carbon dioxide and other gasses play a key role in the whole circuit, facilitating the development of the hydrothermal system. The current level of knowledge sug- gests that the origin of the Suio hydrothermalism is the result of interaction between the carbonate reservoir of the Eastern Aurunci Mountains and the hot and deep crust of this peri- Tyrrhenian sector, where the Roccamonfina volcano repre- sents
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