RE: RMC Depth of Strike Jezzanzuk,
first of all you need to realise that the company has two particular styles of Cu-Au mineralization present:
- Porphyry Cu-Au +/-Mo
- High-sulfidation Au-Cu +/- Ag & As
The porphyry mineralization which they have interescted at a depth of ~1,400m and deeper is uneconomic in todays climate, 0.3-0.4% Cu equivelent will not work at that depth as you'd need to shaft down to ~2,000m and start a block cave or sub-level cave there. the economics just wont stack up at these prices.
It is the High-sulphidation mineralisation, that which they have from 500 - 800m below surface which is of importance. This is the exceptionally high grade material which we are all excited about.
At the moment you are looking at a mineralization envelope which is 100-250 deep, 50-150m wide and +500m long, a very nice project!! grade seams to vary from a percent upto 10% for the highest.
So, forget the porphyry mineralisation, it has very little value to RMC, only to Freeport.
regards
TS