Strong positive fractionation of chromium isotopes in iron formation of the Jacadigo Group (Brazil): a link to enhanced atmospheric oxygenation during the Late Neoproterozoic - Árting, Trygvi Bech; Boggiani, Paulo César; Gaucher, Claudio; Fernandes, Henrique Albuquerque; Frei, Robert (Gondwana Research, 2023)