Project Mineral Resource Estimates were updated in September 2018 (News Release September 18, 2018) by independent consultant MPR Geological Consultants of Perth, Western Australia using Multiple Indicator Kriging (MIK), and are shown below at a range of cut-off grades:
| Deposit | Cut Off | Indicated | Inferred | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mt | Au g/t | Ag g/t | Au Koz | Ag Koz | Mt | Au g/t | Ag g/t | Au Koz | Ag Koz | ||
| Galat Sufar South | 0.3 | 129.0 | 0.92 | 1.19 | 3,823 | 4,954 | 35.4 | 0.8 | 1.1 | 901 | 1,289 |
| 0.4 | 106.9 | 1.04 | 1.29 | 3,575 | 4,448 | 27.0 | 0.9 | 1.2 | 807 | 1,058 | |
| 0.5 | 89.5 | 1.16 | 1.39 | 3,326 | 4,002 | 21.1 | 1.1 | 1.3 | 722 | 873 | |
| 0.6 | 75.6 | 1.27 | 1.48 | 3,080 | 3,607 | 16.9 | 1.2 | 1.4 | 648 | 745 | |
| 0.7 | 64.0 | 1.38 | 1.58 | 2,839 | 3,249 | 13.7 | 1.3 | 1.5 | 582 | 640 | |
| 0.8 | 54.5 | 1.49 | 1.67 | 2,610 | 2,924 | 11.3 | 1.4 | 1.5 | 524 | 558 | |
| 0.9 | 46.5 | 1.60 | 1.76 | 2,392 | 2,629 | 9.4 | 1.6 | 1.6 | 471 | 487 | |
| 1.0 | 39.8 | 1.71 | 1.84 | 2,187 | 2,359 | 7.8 | 1.7 | 1.7 | 424 | 427 | |
| 1.1 | 34.1 | 1.82 | 1.93 | 1,994 | 2,114 | 6.6 | 1.8 | 1.8 | 382 | 375 | |
| 1.2 | 29.3 | 1.93 | 2.01 | 1,815 | 1,892 | 5.6 | 1.9 | 1.9 | 344 | 331 | |
| Wadi Doum | 0.3 | 7.8 | 1.23 | 4.70 | 311 | 1,184 | 4.9 | 0.7 | 3.1 | 106 | 477 |
| 0.4 | 6.3 | 1.46 | 4.98 | 293 | 1,003 | 3.3 | 0.8 | 3.2 | 89 | 337 | |
| 0.5 | 5.1 | 1.68 | 5.22 | 277 | 862 | 2.3 | 1.0 | 3.4 | 75 | 250 | |
| 0.6 | 4.3 | 1.90 | 5.45 | 262 | 751 | 1.6 | 1.2 | 3.6 | 63 | 191 | |
| 0.7 | 3.7 | 2.12 | 5.65 | 249 | 664 | 1.2 | 1.4 | 3.8 | 54 | 149 | |
| 0.8 | 3.2 | 2.32 | 5.84 | 237 | 595 | 0.9 | 1.6 | 4.1 | 47 | 119 | |
| 0.9 | 2.8 | 2.52 | 6.00 | 227 | 540 | 0.7 | 1.8 | 4.3 | 41 | 97 | |
| 1.0 | 2.5 | 2.71 | 6.15 | 218 | 494 | 0.6 | 2.1 | 4.5 | 37 | 81 | |
| 1.1 | 2.3 | 2.89 | 6.27 | 210 | 456 | 0.5 | 2.3 | 4.7 | 33 | 69 | |
| 1.2 | 2.1 | 3.05 | 6.39 | 202 | 423 | 0.4 | 2.5 | 4.9 | 31 | 59 | |
| Combined | 0.3 | 136.8 | 0.94 | 1.40 | 4,133 | 6,137 | 40.3 | 0.8 | 1.4 | 1,007 | 1,766 |
| 0.4 | 113.2 | 1.06 | 1.50 | 3,868 | 5,451 | 30.3 | 0.9 | 1.4 | 896 | 1,395 | |
| 0.5 | 94.6 | 1.18 | 1.60 | 3,603 | 4,864 | 23.4 | 1.1 | 1.5 | 797 | 1,123 | |
| 0.6 | 79.9 | 1.30 | 1.70 | 3,342 | 4,358 | 18.5 | 1.2 | 1.6 | 711 | 936 | |
| 0.7 | 67.7 | 1.42 | 1.80 | 3,088 | 3,913 | 14.9 | 1.3 | 1.6 | 636 | 789 | |
| 0.8 | 57.7 | 1.53 | 1.90 | 2,847 | 3,519 | 12.2 | 1.5 | 1.7 | 571 | 677 | |
| 0.9 | 49.3 | 1.65 | 2.00 | 2,619 | 3,169 | 10.1 | 1.6 | 1.8 | 512 | 584 | |
| 1.0 | 42.3 | 1.77 | 2.10 | 2,405 | 2,853 | 8.4 | 1.7 | 1.9 | 461 | 508 | |
| 1.1 | 36.4 | 1.88 | 2.20 | 2,204 | 2,570 | 7.1 | 1.8 | 1.9 | 415 | 444 | |
| 1.2 | 31.4 | 2.00 | 2.29 | 2,017 | 2,315 | 6.0 | 1.9 | 2.0 | 375 | 390 | |
Notes: Defined under Canadian National Instrument 43-101 ("NI 43-101"), Standards of Disclosure for Mineral Projects. Numbers may not add up due to rounding.
The Mineral Resource has been estimated using the results of 111,761 metres of drilling in 756 holes completed between November 2012 and August 2018.
Importantly, the resource contains a higher-grade core within both the GSS and Wadi Doum deposits which results in the mining of higher grades in the early years of the project, significantly impacting economics.
Relative to the previous Mineral Resource Estimates, the September 2018 Mineral Resource Estimate is based on an additional 10,792m of drilling in 7 diamond holes and 57 reverse circulation (“RC”) holes completed at GSS and an additional 1,882m of drilling in 3 diamond holes and 8 RC holes completed at Wadi Doum.
Results of the Mineral Resource update are shown below by oxidation category at a cut-off grade of 0.6g/t:
| Deposit | Oxcat | Indicated | Inferred | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mt | Au g/t | Ag g/t | Au koz | Ag koz | Mt | Au g/t | Ag g/t | Au koz | Ag koz | ||
| Galat Sufar South | Oxide | 9.6 | 1.32 | 1.41 | 409 | 437 | 1.0 | 1.0 | 1.1 | 31 | 35 |
| Trans | 13.2 | 1.22 | 1.31 | 517 | 557 | 1.5 | 1.0 | 1.1 | 49 | 55 | |
| Fresh | 52.7 | 1.27 | 1.54 | 2,153 | 2,613 | 14.4 | 1.2 | 1.4 | 567 | 655 | |
| Total | 75.6 | 1.27 | 1.48 | 3,080 | 3,607 | 16.9 | 1.2 | 1.4 | 648 | 745 | |
| Wadi Doum | Oxide | 0.6 | 1.90 | 2.82 | 34 | 50 | 0.1 | 1.0 | 1.6 | 3 | 6 |
| Trans | 0.2 | 2.02 | 3.69 | 10 | 18 | 0.04 | 0.91 | 1.6 | 1 | 2 | |
| Fresh | 3.6 | 1.89 | 5.93 | 218 | 683 | 1.5 | 1.2 | 3.8 | 59 | 183 | |
| Total | 4.3 | 1.90 | 5.45 | 262 | 751 | 1.6 | 1.2 | 3.6 | 63 | 191 | |
| Combined | Oxide | 10.2 | 1.35 | 1.49 | 443 | 487 | 1.1 | 1.0 | 1.2 | 34 | 41 |
| Trans | 13.4 | 1.22 | 1.33 | 527 | 575 | 1.5 | 1.0 | 1.2 | 50 | 57 | |
| Fresh | 56.3 | 1.31 | 1.82 | 2,371 | 3,296 | 15.9 | 1.2 | 1.6 | 626 | 838 | |
| Total | 79.9 | 1.30 | 1.70 | 3,342 | 4,358 | 18.5 | 1.2 | 1.6 | 711 | 936 | |
