Graphite from Palaeoproterozoic enhanced carbon burial, and its metallogenic legacy

Abstract The episode of widespread organic carbon deposition marked by peak black shale sedimentation during the Palaeoproterozoic is also reflected in exceptionally abundant graphite deposits this age. Worldwide anoxic/euxinic sediments were preserved as a deep crustal reservoir both carbon, and sulphur accompanying pyrite, commonly >1 wt %. carbon- sulphur-rich crust interacted with mafic magma to cause Ni–Co–Cu–PGE mineralization over next billion years, much uranium currently produced from Mesoproterozoic nucleated upon older graphite. has thus left unique legacy long-term ore deposition.