Chalcopyrite is roughly 34.5% Cu, so your figures are correct.
As for the economy, it really depends on the stripping ratio (how much waste you remove per ore unit). The shallower the orebody is, the less the strip ratio is.
The historical JORC has a cut off of 0.25%, anything below that is not economical to extract. That is affected obviously by the price of the copper and the cost of labour.
The main issue with the last batch of results is that they don’t look as homogeneous as you would like, with lots of low grade that can be considered as waste (in an economical sense).
That’s only based on visuals, who knows if they underestimated or if gold is there to lift the cu equivalent.
Only speculation at the moment, although I don’t expect stellar lab results other than the thick intercepts in holes 4 and 6.
Chalcopyrite is roughly 34.5% Cu, so your figures are correct.As...
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