Integrated seismic ambient noise, magnetotellurics and gravity data for the 2D interpretation of the Vallès basin structure in the geothermal system of La Garriga-Samalús (NE Spain)

The integration of geophysical methods, together with the previous information Vallès basin area, has resulted in creation a new conceptual model that explains La Garriga-Samalús geothermal system. complementary methods seems to be good option for preliminary stages system exploration, especially urban areas. An integrated seismic ambient noise, magnetotellurics, and gravity were used determine geological units structures which control 2D resistivity density models have allowed identification four main regulate system: Miocene basin, Prelitoral Range unit, Faut Zone, Paleozoic basement. interpretation our set Fault is characterized by an anomalous low density, as path hot fluids. Moreover, characterization established geometry basin. presents stepwise morphology, minor thickness towards fault increasing center This related synthetic normal faults. These results evidenced that, although, some systems, warm water may create insufficient physical contrast; appropriate use techniques can still useful exploration medium low-temperature systems.