Chalcopyrite is the primary mineral which by alteration and successive enrichment with copper produces the series starting with chalcopyrite and going through bornite (Cu5FeS4), covellite (CuS), chalcocite (Cu2S), and ending rarely as native copper (Cu).
Chalcopyrite is a major ore of copper. As a copper ore, the yield of chalcopyrite is rather
low, in terms of copper content. It is only 25%, compared to other copper minerals such as chalcocite, covellite, cuprite, or bornite which may contain 50% to 60% copper. However the great quantities and many localities make chalcopyrite the leading source of copper.
"significant primary chalcopyrite with visible copper mineralization"
They said visible copper, not visible chalcopyrite...
"Porphyry orebodies typically contain between 0.4 and 1% copper with smaller amounts of other metals such as molybdenum, silver and gold."
If you're expecting tonnes of native copper, then you should look elsewhere, because it's not what VOY is drilling for.
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