In the “Commodities” thread, there are several posts about copper in a row, especially from this message downwards. I don’t know if it’s of interest in this thread, but I assume someone might find it interesting. 
In the Metso thread, I compiled a summary of copper-related news, partly with Metso in mind, of course, but I also thought this post might be of interest in this thread.
Oroco is not a particularly familiar company to me, and I don’t know exactly if the observations in the aforementioned posts are particularly relevant specifically to Oroco.