Here's a excerpt which contains some information that may add a bit to why EVG will drill in the Antelope Basin and the South Stock.

"From 1993 to 1995, a reverse circulation and diamond drilling program by Newmont Exploration focused on the Tertiary volcanic rocks. This work resulted in the drilling of 15 holes, totaling 10,705 feet in the North Stock area, with a significant zone of low grade gold mineralization being encountered. Significant assays from this program include a 620 foot intersection grading .037 oz/t gold and 195 feet grading 0.029 oz/t gold from two different holes at North Stock. Newmont also identified a large geochemical anomaly associated with the South Stock intrusive but never carried out any drilling. The gold mineralization discovered by ACNC in the iron formation or in the Antelope Basin area was also not drilled by Newmont." From GPM