Magmatism in the Asunción-Sapucai-Villarrica Graben (Eastern Paraguay) Revisited: Petrological, Geophysical, Geochemical, and Geodynamic Inferences
Figure 1
(a) Sketch map of the Paraná-Angola-Etendeka system [3] where the arrows indicate the occurrences of the main dyke swarms. The basaltic lavas are subdivided into broad high- and low-Ti groups and late-stage rhyolites (yellow fields). EP: Eastern Paraguay. (b) Main lineaments in the Paraná-Angola-Etendeka system (PAE), western Gondwana at ca. 110 Ma (modified after [6]), corresponding to the main lineaments of the alkaline and alkaline-carbonatitic complex. Inset: vector diagram showing relationships among absolute plate motions, relative motions, and motion of the Mid-Atlantic Ridge (MAR, after [7]).
