Here is an excerpt from your link;
"The Big Picture
The unique nature of the Tesoro Property allows St. Elias to explore and develop the Property at relatively low exploration costs. Based on results to date, the Company is in a position to continue with this exploration method indefinitely (exploring while concurrently proving up reserves), however, the Tesoro Property has never been evaluated to depth or to its full strike potential. This leaves a large potential for the discovery of additional mineralization. Gold has been extracted from this area for not only years, decades and centuries, but millenia. The source of the gold has never been located."