Two-dimensional magnetotelluric and gravity models of the Tuzgle volcano zone (Jujuy province, Argentina)

The Tuzgle volcano (24 ° 03′S, 66 ° 29′W) is situated in the southern part of the South American Andean Altiplano (Puna). The region has several geothermal manifestations. A 2-D magnetotelluric model of resistivity distribution and a 3-D gravity anomaly of the area have been proposed. A highly conductive and low density body is probably associated with a magma chamber surrounded by free saline fluids with its top at about 8 km depth. The release of fluids might be caused by the chemical reactions generated at the subduction plate of Nazca in contact with the South American plate.