Le potenzialità geotermiche di alcune aree del Medio Campidano oggetto di ricerca di risorse a media entalpia

Giuliano Gabbani (a,b), Enrico Pandeli (a,b), Alessandro Ronconi (a,b) & Sauro Valentini (b)
(a Dipartimento di Scienze della Terra dell'Università di Firenze, Via La Pira, 4, 50121, Firenze. E-mail: giuliano.gabbani@unifi.it (b) G.I.G.A. - Gruppo Informale per la Geotermia e l'Ambiente, c/o Multiverso, via Campo d'Arrigo 42/r - 50131 Firenze.

The middle part of the Campidano Valley has gained a renewed interest in the geothermal exploration due to the attention of private investors determined to define the presence of medium-enthalpy geothermal resources in the subsurface of this sector of Sardinia. The study area is a portion of the Plio-Pleistocene Campidano Graben that is bordered both to the north and to the south by structural highs (e.g. the Iglesiente-Sulcis horst) mostly made of Paleozoic metamorphic rocks, deformed and recrystallized during the Variscan Orogeny. Available data suggest that the geothermal reservoir can be positioned in the fractured Paleozoic metamorphic rocks below the Miocene-Quaternary sedimentary filling of the Campidano Graben. The thermal fluids locally reach the surface in correspondence of the border normal fault systems of the graben.Research activities include a first phase of surface investigations, such as geological, hydrogeological and geochemical surveys, and fa geophysical prospecting aimed to assess the quality and quantity of the geothermal resources.

geothermal resources, MedioCampidano, exploration activities.