Excelso, R. et al. 2024. 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. International Kimberlite Conference: Extended Abstracts. 12, (Jul. 2024). DOI:https://doi.org/10.29173/ikc4154.