"Head-grades of the trial feed-ore were estimated using a combination of laboratory analysis of samples taken from high-density (3x3m) blast-hole drilling in the pit (open-hole rotary air blast rig), and resource drilling (both RC and diamond drills)...all of which correlated well with the resource block model estimated grades."
Right. So, no DSO. According to the block grades.
Ann: Mining finally reaches massive copper zones, page-16
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