I do appreciate the cautionary comments, so thanks! You do have to be mindful that the hits are on an angle.
Still, width of ~36m-ish at 59 deg, is about 27.7m in horizontal width. I always approximate 100m at 1% Cu is high enough grade to make a great resource, so this is still well above that. Plus usually the higher grade, the easier processing is. As for the vertical resource, underground mining has been doing these for years. In fact, it usually helps that its more vertical in terms of efficiency.
Ann: Mount Hope Discovery - 37m @ approx. 5% Copper, page-47
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