RE: Magic's presentation - Nagging Question for me26 Jan 2021 16:47
Hi Spratt,
It is a post-mineralisation mafic dyke. We know that it post-dates the mineralisation event because it unmineralised itself. If it were pre- or even syn-mineralisation, you would expect that the dyke would also be carrying some Au-Cu grade, or at very least show some alteration/tectonism. The mafic dyke intrusion is a grade destructive event.
S