The Euganean Geothermal Field (EGF) extends on a plain band to the south-west of Padua (NE Italy). Approximately 14*106 m3/y of thermal water with temperature from 65°C to 86°C are exploited from different, 300- 1000 m deep, fractured rock aquifers located within Mesozoic carbonate formations. The EGF represents the outflow area of a regional, 100 km-long, hydrothermal system. Oxygen isotopic analysis evidences the meteoric origin of the water that infiltrates at approximately 1500 m a.s.l. in the Veneto Prealps. The water flows towards the South in the Mesozoic carbonate formations and reaches a depth of approximately 3000 m warming to 100°C due to the normal geothermal gradient. The regional Schio-Vicenza fault systems and its highly permeable damage zone increase the water flow. In the EGF area, an interaction zone between the segments of the fault system and the related extensional tectonic regime produce a local fracture network that enhances the permeability and the quick rising of the thermal water.
From conceptual to numerical model: an example in the Euganean Geothermal System (NE, Italy)
PICCININI, LEONARDO;
2016
Abstract
The Euganean Geothermal Field (EGF) extends on a plain band to the south-west of Padua (NE Italy). Approximately 14*106 m3/y of thermal water with temperature from 65°C to 86°C are exploited from different, 300- 1000 m deep, fractured rock aquifers located within Mesozoic carbonate formations. The EGF represents the outflow area of a regional, 100 km-long, hydrothermal system. Oxygen isotopic analysis evidences the meteoric origin of the water that infiltrates at approximately 1500 m a.s.l. in the Veneto Prealps. The water flows towards the South in the Mesozoic carbonate formations and reaches a depth of approximately 3000 m warming to 100°C due to the normal geothermal gradient. The regional Schio-Vicenza fault systems and its highly permeable damage zone increase the water flow. In the EGF area, an interaction zone between the segments of the fault system and the related extensional tectonic regime produce a local fracture network that enhances the permeability and the quick rising of the thermal water.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
