By SD Contributor SRSrocco:
The top primary silver mining company in the world, Fresnillo LLC saw its averge silver yield decline 13% in 2012. The large percentage of the decline came from its flagship Fresnillo mine whose average silver ore grade fell from 396 g/t in 2011 to 328 g/t in 2012.
As ore grades decline, it takes more energy to produce the same or less metal. [Read more...]