New Ar-Ar age and C-O isotope geochemistry of the Piedade (Aps) carbonatite complex of the Ponta Grossa Arch region, Southern Brazil: petrological implications - Excelso, Ruberti; Azzone, Rogério; Gomes, Celso B.; Chmyz, Luanna; Cabral Neto, Izaac; de Hollanda, Maria Helena Bezerra Maia; Aps, Vladimir; Bettencourt, Jorge (International Kimberlite Conference: Extended Abstracts, 2024)