USAU 2019 Keystone drilling comprised of one core hole and six reverse-circulation holes, totalling 13,177 feet (4,016 m).

Nearly all of the holes drilled encountered moderate to thick intervals of anomalous gold with moderate to locally strong associated pathfinder metals within both Carlin-style and skarn style mineralization. Nearly all significant gold intercepts are hosted in previously defined prospective Upper Plate and Lower Plate host rock environments where favorable structures exist, including: Lower Valmy-Comus units, Roberts Mountains Thrust (Upper Plate-Lower Plate contact), Devonian Horse Canyon-Wenban contact, and Wenban Unit 5.

Five of the seven holes intersected significant gold assays, highlighted by the Key19-05rc drill hole, the first ever drill-hole test of the Nina Skarn target, a +700m long coincident gold-bismuth-tellurium rock and soil anomaly defined in 2018 by surface sampling. The Key19-05rc drill hole encountered two thick intervals of strong, mostly oxide gold mineralization: 67.06m of 0.194 gpt from 12.2m and 76.2m of 0.224 gpt from 150.9m. These encouraging results further affirm the potential for large gold systems at Keystone, with similar potential for the neighboring Cortez Hills district. In addition to following up on the Nina Skarn area, Greenstone Gulch, Breccia Ridge, McClusky West and Jasperoid Ridge target areas are especially favorable and will be the focus on our Keystone 2020 follow up exploration efforts.

Please click the following for summary drill tables of past drilling campaigns:

Fall 2016 Drill Summary Table
Early 2017 Drill Summary Table
Fall 2017 Drill Summary Table
2018 Drill Summary Table
2019 Drill Summary Table