Correct ozbucheron. However, in the case of Antler the wall...

Correct ozbucheron. However, in the case of Antler the wall rocks contain almost no mineralisation, which should be expected as massive sulphide layers are normally in sharp contact with host rock. This is also apparent from the resource estimation numbers. If you refer to the resource statements you will see that an increase in the cut-off grade of 0.8 Cu%Eq. to 2.0 Cu%Eq only drops the copper content by 4.1% and Zn by 4.5%, confirming the sharp contacts of the deposit.

Plough, given the formula, you must read it for Antler: 10,600 "ore" / (10,600 + 4,800 waste) = 0.688. Therefore a 31.2% reduction in grade. I wrote "ore" as no feasibility study has been completed and therefore the material cannot be termed ore in terms of the technical codes. For every tonne of "ore" 0.453 tonne of waste is mined and processed.