Alexmc
The oter thing I would do, given the size of CdB, and given that the MAJORITY of it is undrilled, I would allocate a risk factor to the portion that is un drilled.
So the 7 million tonne of ore that has been historically drilled to be alloted the 2.14% copper grade but the rest should be risked by maybe 20%. That is, the balance,(43 Million tonne) should be calculated at 1.75% copper.
ctvwf , page-37
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