Mossberg says " It assumes Zn will be priced at a 15-20% premium to avg price over recent weeks. Opex is costed $1.12 per/oz (Zn eq) despite Zn selling $1.04 as recently as 19 Sep". I don't believe that the scoping study maintained these assumptions and figures.
Also Mossberg states "On the other hand, if one assumes (not unreasonably imo) the price of zinc may fall back to where it sat just a few weeks ago, azure actually loses money for each ounce it pulls from the ground". Predicting the metal prices is fraught with problems, and Mossberg is correct that if the price of zinc fell far enough, the mine would not be economic, but there is no statement or implication that such an event is likely. Such a statement can apply to every mine, but has a low probability of being realized.