magnetotelluric method Argentina 28 Magnetotellurics 20 electrical resistivity 14 Magnetotelluric 10 Sierras Pampeanas 10 sedimentary basin 10 subduction zone 10 Rio de la Plata 8 Tectonics 8 data inversion 8 electrical conductivity 8 Andes 6 South America 6 asthenosphere 6 craton 6 crustal structure 6 mantle structure 6 slab 6 Chaco-Pampean Plain 4 Daily variations 4 Electrical conductivity 4 Electrically conductive 4 Entre Rios 4 Geo-electromagnetic induction 4 Gondwana 4 Magnetism 4 Metals 4 Moho 4 Nazca plate 4