lithospheric structure Andes 10 Argentina 8 South America 8 continental margin 8 Central Andes 6 Moho 6 tectonic setting 6 Bouguer anomaly 4 Gondwana 4 Lithospheric structure 4 Structural geology 4 Three dimensional 4 Western Gondwana 4 continental crust 4 extensional tectonics 4 gravity field 4 lineament 4 magnetotelluric method 4 oblique fault 4 rifting 4 slab 4 structural control 4 structural geology 4 subduction 4 subduction zone 4 tectonic evolution 4 three-dimensional modeling 4 3D density model 2 Airborne magnetic data 2