Aztec Summarizes 2021 RC Drill Results from Tombstone Project, Arizona; Multiple, Shallow, Thick, Oxidized Gold-Silver Intercepts Expand Mineralized Zones Around and Below the Contention Pit, Still Open in All Directions

Every one of the 23 drill holes intersected shallow oxidized gold-silver mineralization over substantial widths, thirteen drill holes crossed old tunnels where presumably the highest-grade ores were previously mined, several drill holes encountered visible gold, and all drill holes bottomed in mineralization, indicating the main mineralized zones are still open to depth as well as laterally.

The drill holes were spaced approximately 50 m apart along fence patterns trending NNE, and dipping from near vertical to -45 degrees E. The 2021 drill holes are step outs from the 2020 RC drill holes reported previously in the north and central parts of the Contention open pit.  Two of the drill holes (TR21-21, 22) were twins of historic USMX drill holes TR-57 and TR-67, which along with one 2020 twin drill hole (TR20-18) will be used to verify the USMX drill data for use in a future resource estimation.

View: Tombstone Longitudinal Section and Tombstone 2020-2021 RC Drilling Plan Map

Section H: Link to Section View H

• Hole TR21-13 – 1.8 grams per tonne (gpt) gold and 36.9 gpt silver (2.33 gpt gold equivalent (AuEq)) over 70.1 meters (m), including 6.08 m grading 2.93 gpt gold and 157 gpt silver (5.17 gpt gold equivalent AuEq) and 1.52 m with visible gold in quartz veining grading 55.71 gpt gold and 176.1 gpt silver (58.22 gpt gold equivalent AuEq). Hole bottomed in mineralization grading 0.37 gpt AuEq when ground caving forced early termination of the hole

Interval has argillic and siliceous alteration, fine-grained sandstones, siltstones cut by quartz-feldspar porphyry dikes, faults/fissures, and hydrothermal breccias with quartz veining. Moderate to strong iron oxides, weak manganese oxides, orange-red color, and 1-3% oxidized pyrite. The drill hole interval exposed one mine working, adjacent to strong oxidation. Visible gold and cerargyrite (AgCl) was found at 132.6 – 135.7 m in a quartz vein.

Section I: Link to Section View I

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