Ann: Drilling to extend Cangallo Cu-Au discovery, page-39

Mining and processing costs benefit from the scale of these operations and there are a
number of profitable large-scale operations (Cerro Verde, Cuajone, Toqueapla and the
recently developed Quellaveco deposit, plus a new approved development at Zafranal)
located within the Arequipa District where Cangallo is situated, using head grades between
0.20% and 0.40% Cu. These mines have multi-decade mine-lives and are long-lived assets

Profitable large-scale operations.. using head grades between 0.20% and 0.40% Cu

If we can prove scale and numbers between 0.20% and 0.40% or better then I guess we are in business... quite big business

I wonder what grades you might find if you found the centre of the porphyry system and a supergene blanket??

We've touched 1.1% so that's a start I guess