I have given an account of the porphyry emplacementAt Goldstorm of being the deep occurence it is - thereby subsequently accounting for the accompanied hindrance of significant hydrothermal chemical interaction. The geophysics indicate minimal shearing atop the porphyry of disseminated low grade ore that in conjunction with a limited hydrothermal interaction at depths nearing a kilometer - were thereby emplaced by conduit within a limited zone of shearing. Entrapment as tiny cells of semi high grade ore a half kilometer approximately above the massive low grade ore body below occurred here
These tiny pockets of higher than normal semi high grade ore found in the so called super cell zone of emplacement, pose the very limiting factors I've explained here for a dissemination massive enough to quantify an economical mine to be brought into production even at these closer to surface depths.
In regard of the sensationalized bandied about deep porphyry of low grade gold open in all directions hype that got this operation thus far, there could be as much in gold nuggets strewn about the surface on Mars for all the economical viable good either could ever hold in getting to it.
Keep in mind though, near surface porphyry's found beyond the boundaries of Tudor's TC GS deposit pose an entirely different set of viable economical circumstances regarding favorable emplacement features.
Just not here.