Surface water oxygenation and low bioproductivity during deposition of iron formation of the Jacadigo Group (Brazil): insights from combined cadmium – Chromium isotopes - Frei, Robert; Gaucher, Claudio; Boggiani, Paulo César; Frederiksen, Jesper Allan; Walker, Samantha Renee; Fernandes, Henrique Albuquerque; Caxito, Fabricio de Andrade (Chemical Geology, 2024)