Geological model of a young volcano-plutonic system: The geothermal region of Monte Amiata (Tuscany, Italy)

Investigating fossil hydrothermal systems by means of fluid inclusions and stable isotopes in banded travertine: an example from Castelnuovo dell’Abate (southern Tuscany, Italy)

“…According to this model, the thermal anomaly developed in response to the emplacement of a large magma body in the upper crust. Such intrusion probably corresponds to the large uplifted region in the Monte Amiata area, showing an elliptical shape with major axes of 25-30 and 45-50 km (Gianelli et al 1988). Ages up to 218 ka have been reported for the travertine plate of Montemerano ( Fig.…”

“…1a), the occurrence of numerous CO 2 -rich gas emissions (Frondini et al 2009) and the two geothermal fields (Bagnore and Piancastagnaio) exploited for electricity production (Batini et al 2003). All these features can be related to the thermal anomaly generated by a granitoid cooling at about 6-7 km below sea level (Gianelli et al 1988;Bertini et al 1995;Brogi 2008).…”

Influence of depth, temperature, and structure of a crustal heat source on the geothermal reservoirs of Tuscany: numerical modelling and sensitivity study

“…Young (Pliocene to Quaternary) granite plutons have been identified as the primary heat source in the southern Tuscan geothermal areas including Larderello-Travale and Monte Amiata (Brogi 2008b;Frondini et al 2009;Gianelli et al 1997Gianelli et al , 1988. These acidic intrusive bodies belong to the Tuscan Magmatic Province (Innocenti et al 1992) and can be linked to the extensional tectonic setting in the region (Brogi 2008b).…”

3D Geothermal Modelling of the Mount Amiata Hydrothermal System in Italy

“…In the deeper reservoir temperatures up to 300-350 °C are actually measured. The fluid in this reservoir is a two-phase too [3,10]. This represents the main reservoir industrially exploited at present [13] with a total power production of 88 MWe.…”

“…In Figure 3 traces of interpreted seismic lines, derived from [4][5][6]10,13,[19][20][21][22]29,30], are reported. In particular, seismic lines define the structural setting of the main geological units, evidencing reverse faults (main thrusts) involved in Miocene compressive phase of North Apennine chain formation, normal faults formed during the successive Pliocene-Pleistocene tensional phase.…”