@ozbucheron, I get about 0.1% (approx 1000ppm) on the first 21m...

@ozbucheron, I get about 0.1% (approx 1000ppm) on the first 21m too. But this is in the halo zone and whilst you call that dross, and it is relative to economic grades and would likely go to waste, I see it as significantly anomalous in terms of exploration. Obviously this is not a porphyry system but I've seen companies exploring porphyries happily talking up 0.2% (2000ppm) in their exploration

As far as the difference between your calc and the company's geos, my only assumption would be yours is from the averages and they may be running off more specific data seeing that they cite a range of 100-1500ppm in that halo zone. I guess that's density weighting as you suggest.

I note your polygonal interpretation roughly confirms the company's interpretations at 302 and 305. That seems rather cool to me and I remain very very keen to find out what is at depth that was feeding the system from below that constriction point. So far layers in the orthodox model they've presented previously have been respected in the profile so I'm making the presumption that there's a primary ore zone awaiting discovery.