RE:51 meters of 3.84 gms per ton The point being made here is the universality that every wealthered outcropping of gold ( ie oxides ) derives from the upthrust of the basement granite lode which can go as deep as 4 km.
What is happening around most of the world....and Murchison is a great example...is that we are running out of the low hanging fruit represented by the oxide open pit gold resources.
Selinsing ,Buffalo Reef, Peranghi and Mentique all are sourced from their higher grade basement lodes.
Monument is blessed in this regard in that hardly a single one of its 36 or so mined open pits have been commercially mined for their basement lodes