Petrology and geochemical characterization of the mantle sources in the northwest region of the Paraná continental flood basalt province - Machado, Fábio Braz; Rocha Júnior, Eduardo Reis Viana; Nardy, Antonio Jose Ranalli; Marques, Leila Soares; Babinski, Marly (South American Symposium on Isotope Geology, 2014)