Go Long,

I find these excerpts from Loris Dec 20th NR very interesting, the words "thoroughly exploited", catch my eye.

. The "ore shoots" in these veins were thoroughly exploited by independent miners in past years, but production was limited to a few tonnes per day (pers. comm., Marcial Portocarrero, 2012).

Explore for high-grade gold in selected parts of the A-4, C-2 and Poderosa veins, notably the inferred down-plunge "ore shoots" in these veins that were thoroughly exploited by independent miners in years past.

http://news.morningstar.com/all/access-wire/ASWAccesswire400667MSN/st-elias-mines-ltd-announces-exploration-and-development-plans-for-tesoro-project-in-peru.aspx