If you want to know about the economics of mining gold in the modern day have a look at this: http://www.mining-technology.com/projects/olympic-dam/ This is the sort of mine that will yield the largest amounts of gold/silver piggybacking off the copper and uranium. Mining gold as the sole commodity is costly, mining it as a by-product of copper, well even low grade gold deposits become viable.
What I am saying here is that if the copper price tanks then gold production is likely to reduce about a year or so later (as the mining companies scale back). This may be a good thing for gold only miners as the competition from those large suppliers will diminish.
What I am saying here is that if the copper price tanks then gold production is likely to reduce about a year or so later (as the mining companies scale back). This may be a good thing for gold only miners as the competition from those large suppliers will diminish.