"The addition of the pre-leach thickener, extra leach tank, and...

"The addition of the pre-leach thickener, extra leach tank, and oxygen plant will sequentially increase recoveries by ~5% to 93% when the ore blend is dominantly sulphide."

This is an good comment to see in this quarterly report. Increasing recovery by 5% with so little extra effort makes just so much common sense. The mine is in a region with deep oxide weathering so even Blind Freddy would expect a significantly thick zone of partially oxidized sulphides ( I guess this contains the copper sulphide mineral bornite)

Pay attention M.D. You can learn something.