RE:An interesting article on grade and volume.Low grade bulk tonnage deposits are the booby prize of the mining world. Sure, some of them work, some can make money, but that's based on the strength of external factors such as infrastructure, gold price, jurisdiction, etc. Never seen a low grade bulk tonnage deposit stand on its own for long. There's either a bunch of headframes clustered together to make them worthwhile, or they just outright fail. Grade is king.