mining geology - question for juk and others, page-9

Sealclubber, this is the bit that perhaps intruiges me the most and it's from the broker report: Could you shine some light on this please?

"Exploration companies try to excite investors with the potential for a
porphyry deposit at depth, but they don't know how deep it will be,
or how expensive it will be to locate it. Here, "the stock in question" has an epithermal
zone at surface and it has already identified the porphyry system
beneath it, 1,000m down the mountain slope. It has the whole box
and dice - the entire geological model."