I wish they'd share the strata on the diagram of drill intercepts. They must have a pretty good idea where the strata lie because drill holes, particularly diamond ones, provide visual data (plus extra visual spectrum) on the rock morphology.
Don't know if they use automated core logging or not they will know the level of alteration of the host rock and penetration of the mineralizing fluids. ( if they can get that indication from above-ground spectral analysis surely that can provide a much better picture from logging). The Sn grade intercepts will form the anchor points. No one is going to hang them if they need to improve their model later with more data. It's pretty standard practice and these guys aren't exactly on the nose.
It's not like they're missing the targets either. Still, overall I find them more worthy of trust than most.
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