Magmatism in the Asunción-Sapucai-Villarrica Graben (Eastern Paraguay) Revisited: Petrological, Geophysical, Geochemical, and Geodynamic Inferences

Figure 4

Geological sketch map of the Asunción-Sapucai-Villarrica graben showing the main occurrences of magmatic rock-types, modified after [33]. In parentheses preferred K/Ar and plateau Ar/Ar ages (in bold) in Ma according to [4, 33]. K-alkaline complexes: 1, Cerro Km 23 (132, 128); 2, Cerro San Benito (127); 3, Cerro E. Santa Elena (126); 4, Northwestern Ybytyruzú (125–129); 5, Cerro Capiitindy (n.a.); 6, Mbocayaty (126–130, 126); 7, Aguapety Portón (128–133, 126); 8, Cerro Itapé (n.a.); 9, Cerrito Itapé (n.a.); 10, Cerro Cañada (127); 11, Cerro Chobí (n.a.); 12, Potrero Garay (n.a.); 13, Catalán (n.a.); 14, Cerro San José (127); 15, Potrero Ybaté (126–128, 128); 16, Sapucai (119–131, 126); 17, Cerro Santo Tomás (126–130, 127); 18, Cerro Porteño (n.a.); 19, Cerro Acahay (118, 127); 20, Cerro Pinto (n.a.); 21, Cerro Ybypyté (124); 22, Cerro Arrúa-í (126–132, 129). Na-alkaline complexes: A, Cerro Patiño (39); B, Limpio (50); C, Cerro Verde (57, 61); D, Ñemby (46, 61); E, Cerro Confuso (55–61); F, Nueva Teblada (46–57); G, Lambaré (49); H, Tacumbú (41–46, 58); I, Cerro Yariguaá (n.a.); J, Cerrito (56); K, Cerro Gimenez (66); L, Cerro Medina (n.a.); M, Colonia Vega (n.a.). Detailed information on the single occurrences, that is, geological map, location, country rocks, forms, and main rock-types, is provided in [33–36]; n.a.: not available.