Porphs can be a pretty decent grade as well.
particularly if you hit the shell.
Chuquicamata (Chile) is a great example (Incain arc)
i am uncertain due to literature (or the lack of) around the Toquepala Arc but assume they are much the same as any arc setting Cu/Au/Mo porph. Best thing is that there IS not a lot of literature which suggests potential for a completely different ARC and/or genetic model for Andean grass roots copper exploration.
Porphs can be a pretty decent grade as well.particularly if you...
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