“…12B,13B,and 14B). Previous studies have shown that Au, As, Sb and other trace metals can be concentrated in sulphide rich carbonaceous mudstones as these elements are preferentially incorporated into diagenetic sulphides (Large et al, 2007(Large et al, , 2011Pitcairn, 2011;Tomkins, 2010Tomkins, , 2013. Sulphur concentrations are marginally higher in pelitic compared to psammitic rocks (Fig.…”