I know it's the same, but the convention for Co exploration is ppm, once you have something reasonable the accepted industry standard is in % amounts.
Using g/T is typical for precious metals such as Au, Ag and the Pt group, using g/T for Co is attempting to bring precious metal implications to a base metal commodity, during the iron ore boom you didn't see iron ore explorers or producers quote Fe in g/T - they used the appropriate and industry acceptedaaccepted ter and units of % and they would have been laughed out of the market for using anything else.
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