I see your point oafter. I've been sifting through releases from our neighbour URA, they've reported some info re typical mineralisation in the area. Quote from earlier this year - "Mineralisation is generally quite shallow, ranging from exposed at surface to depths of 50 metres. Grade is often high, with assays by AAM in 2010 being typically in the range 45-55% MnO2 on the Kabwe projects and 48-60% MnO2 in Mansa and Serenje areas."
I'd suggest that the directors have seen some good indications at surface and are confident.
High grade strip mining operation with ore processed in Mansa.