Gamma-ray spectrometry as a tool for mapping petrographic domains in granitoids: the examples of the Cunhaporanga and Três Córregos granitic Complexes, Paraná state, Southern Brazil - Ferreira, Francisco José Fonseca; Fornazzari Neto, Luiz; Szameitat, Luizemara Soares Alves; Guimarães, Gilson Burigo; Martin, Victor Miguel Oliveira; Prazeres Filho, Helcio José dos; Ulbrich, H. (Revista Brasileira de Geofísica, 2014)