U-Pb zircon ages of post-orogenetic granitic magmatism in Apiaí folded belt (Paraná state, southern Brazil): petrological and geotectonic significance - Prazeres Filho, Hélcio José dos; Basei, Miguel Angelo Stipp; Passarelli, Claudia Regina; Harara, Ossama Mohamed Milad; Siga Júnior, Oswaldo (South American Symposium on Isotope Geology, 2003)