"the feasibility study on SC suggested annual gold production of 201,000 ounces annually. This is only two-thirds of what Barrick considers a “second tier” asset. There is no indication that Barrick is looking at an investment in Copper."

I doubt very much their most coveted assets are classed by the volume they produce from a particular mine but would be based on which mine has the lower cost to produce it. Profit margin and projected mine life are what's important as you don't produce money with volume.