In an interview yesterday, King argues:

Because we're in a world that appears to have encountered peak gold as well as peak oil. If you look at historical production, worldwide gold output reached a top right around the year 2000–2001. Overall output has declined and we're not replacing output from the big mines of the past. Despite discoveries here and there, miners have to dig deeper and deeper into the reserves. In a big mining country such as South Africa, for example, some of the deepest mines now are at 4,000 meters. That's 13,000 feet.

Is King right?

Yes, it turns out he might be.

Mining-Technology.com stated in March 2008:

Global gold production has been in steady decline since 2002. Production in 2007 was around 2,444t, down 1% on the previous year.

Analysts note that virtually all of the low-lying fruit has now been picked with respect to gold, meaning that companies will have to take on more challenging and more expensive projects to meet supply. The extent to which the current high price of gold can translate into profits remains to be seen...

According to Bhavesh Morar, national leader of the mining, energy and infrastructure group with Deloitte Australia, frenzied exploration activity over the last few years has seen virtually all of the easy harvest been picked with respect to gold...

The high price of gold is however encouraging more adventurous projects, be they more challenging financially, geologically, geopolitically or all three. New projects for gold and other resources are mushrooming throughout Africa, China, the Middle East and the former Soviet Union; all areas where sovereign risk is potentially very high.

Zeal Speculation and Investment wrote in July of this year: