Abstract
The project aims investigating the large number of alkaline rock occurrences present in the South American platform. This magmatic activity is found in and around the Paraná Basin in Brazil, Paraguay, Bolívia and Uruguay, but it is more concentrated in the former two countries. It started in the Permian- Triassic (250-240 Ma) and lasted up to the Oligocene (~39 Ma) times. Apart from its c…