Primary Iron- and Manganese-Carbonate Deposition in the Palaeoproterozoic Hotazel Formation, South Africa, and Implications for the Great Oxidation Event

Xolane Reginald Mhlanga1, Harilaos Tsikos1, Adrian Boyce2 and Timothy W Lyons3, (1)Rhodes University, Grahamstown, South Africa, (2)Scottish Universities Environmental Research Center at the University of Glasgow, East Kilbride, United Kingdom, (3)University of California Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States