1. Graduate Program of Geology and GeochemistryFederal University of Pará Av. Perimentral 2651, Terra Firme 66077‐530 Belém PA Brazil
2. Federal Institute of Pará Av. Alm. Barroso, 1155, Marco 66090‐020 Belém PA Brazil
3. CENA/14C LaboratoryUniversity of São Paulo Av. Centenário 303 13400‐000 Piracicaba São Paulo Brazil
4. Physics DepartmentLAC‐UFF AMS Laboratory‐Fluminense Federal University Niteroi Rio de Janeiro Brazil
5. Institute of GeoscienceUniversity of São Paulo Brazil
6. CENA/Stable Isotopes LaboratoryUniversity of São Paulo São Paulo Brazil