Given there a few newbies around and plenty of people including geologists that 'just don't get it', I think it's worth reposting a couple of crucial elements.
The pervasive, disseminated mineralisation and the equidimensional, widespread distribution mean that:-
- there is no nugget effect in the fresh rock because the gold is microscopic and disseminated. There's no coarse gold causing the high grades. Quite the opposite in a general sense, it's more likely to be poor extraction recoveries causing the low grades results. There is coarse gold in the saprolite but the saprolite only constitutes a tiny portion of the orebody.
- every time the excavator teeth cut the pit floor we will be mining super high grade ore. The planned pits will be located in one of the highest grade portions of the orebodies.
So apart from the huge tonnage potential, the ridiculous grades and an outcropping orebody, the geometry and distribution of the mineralisation enhance the awesome project economics:
www.cet.edu.au/docs/default-source/training-courses-/gold-grades-and-gold-costs-exploding-the-high-grade-myth.pdf