Resource Area Indicated Inferred
Tonnes Au (g/t) Au (ozs) Ag (g/t) Ag (ozs) AuEq (g/t) AuEq (ozs) Tonnes Au (g/t) Au (ozs) Ag (g/t) Ag (ozs) AuEq (g/t) AuEq (ozs)
Doby George1 12,922,000 0.98 407,000 0.98 407,000 4,999,000 0.73 118,000 0.73 118,000
Wood Gulch2 4,359,000 0.66 93,000 5.80 808,000 0.74 104,543
Gravel Creek3 1,315,000 4.73 200,000 75.0 3,169,000 5.81 245,271 2,744,000 4.16 367,000 60.20 5,307,000 5.02 442,814
TOTAL 14,237,000 1.33 607,000 75.0 3,169,000 1.43 652,271 12,102,000 1.48 578,000 15.74 6,115,000 1.71 665,357

$1800 Gold Price , Ag: Au used is 70:1
1. Pit constrained 0.2 g/t Aueq cutoff for oxide, 0.4 g/t Au cutoff for mixed and 1.4 g/t Au cutoff for unoxidized
2. Pit constrained 0.2 g/t Aueq cutoff
3. 3.0 g/t Au cutoff

Gravel Creek Sensitivity Table with Varying Grade Cut-offs
Indicated Inferred
Cutoff (Au g/t) Tonnes Au (g/t) Au (ozs) Ag (g/t) Ag (ozs) AuEq (g/t) AuEq (ozs) Tonnes Au (g/t) Au (ozs) Ag (g/t) Ag (ozs) AuEq (g/t) AuEq (ozs)
2.0 2,079,000 3.72 249,000 59.6 3,986,000 4.58 305,943 5,394,000 3.12 540,000 45.5 7,897,000 3.77 652,814
3.0 1,315,000 4.73 200,000 75.0 3,169,000 5.81 245,271 2,744,000 4.16 367,000 60.20 5,307,000 5.02 442,814

All resources were independently estimated by Mine Development Associates of Reno, Nevada and documented.

"2021 Updated Resource Estimates And Technical Report For The Aura Gold-Silver Project, Elko County, Nevada" Effective Date October 14, 2021

  • Gravel Creek resource is entirely sulfide material
  • Wood Gulch resource is oxide material
  • Doby George resource is 81% oxide, 17% mixed and 2% unoxidized in Indicated category and 56% oxide, 37% mixed and 7% unoxidized in Inferred category