Recovery targetI don't believe that 90% sustained recovery is realistic. This is Archean sulfidic ore. Water and oxygen have never touched it in the billions of years since it was extruded from the core. Without oxygen the ore cannot become oxidized (by definition). Oxide ore processing is relatively predictable and less costly. Heavily sulfidic ore requires optimized grinding and multiple techniques of separating gold from the base rock. I would be delighted if they could achieve 88% consistently and they would be very profitable at that.