Re: a figure of 20% copper was mentioned
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posted on
Nov 04, 2015 02:40PM
Combining Classic Mineral Exploration with State of the Art Technology
I watched a YouTube video this weekend on the Bisbee tunnels which said that tunnels total 2500 miles.
I saw it somewhere but darn if I can find it, that Bisbee shallow skarns where of very high content.