"Chalcopyrite may have various amounts of silver in place of the copper, gallium or indium in place of the iron, and selenium in place of the sulfur. Thus these metals are all byproducts of copper production."

http://geology.about.com/od/minerals/ig/minpicsulfides/minpicchalcopyrite.htm

Some amounts of silver at Hay Mountain would not be a surprise, given Tombstone is but 5-6 miles NNW. Gallium and/or indium and/or selenium may be welcome additions to he mix too, if there, as these all have commercial applications.

I'd sure like to know the Niton readings on those outcroppings.

VP