Magmatism in the Asunción-Sapucai-Villarrica Graben (Eastern Paraguay) revisited: petrological, geophysical, geochemical, and geodynamic inferences - Comin-Chiaramonti, P.; De Min, Angelo; Cundari, Aldo; Girardi, Vicente Antonio Vitorio; Ernesto, Márcia; Gomes, Celso B.; Riccomini, Claudio (Journal of Geological Research, 2013)