Reserves & Resources
MINERAL RESOURCE AND ORE RESERVE STATEMENT - DECEMBER 2021
Gold Resources Statement | Measured | Indicated | Inferred | Total Resources | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Project | Type | Cut-Off | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | CP |
Cowal1 | Open-Pit | 0.35 | 24.8 | 0.46 | 367 | 207.5 | 0.83 | 5,555 | 37.3 | 0.78 | 929 | 269.6 | 0.79 | 6,852 | 1 |
Cowal | Underground | 1.50 | – | – | – | 22.4 | 2.47 | 1,776 | 13.3 | 2.32 | 991 | 35.7 | 2.41 | 2,766 | 1 |
Cowal1 | Total | 24.8 | 0.46 | 367 | 229.9 | 0.99 | 7,331 | 50.6 | 1.18 | 1,920 | 305.3 | 0.98 | 9,618 | 1 | |
Red Lake | Underground | 3.30 | 0.0 | 4.20 | 4 | 29.7 | 7.30 | 6,968 | 18.7 | 6.66 | 4,013 | 48.5 | 7.05 | 10,985 | 2 |
Bateman | Underground | 2.50 | – | – | – | 2.1 | 4.93 | 335 | 3.0 | 4.37 | 422 | 5.1 | 4.60 | 757 | 2 |
Red Lake3 | Total | 0.0 | 4.20 | 4 | 31.8 | 7.14 | 7,303 | 21.7 | 6.34 | 4,435 | 53.6 | 6.82 | 11,742 | 2 | |
Mungari1 | Open-Pit | 0.40 | – | – | – | 44.3 | 1.18 | 1,676 | 10.5 | 1.36 | 458 | 54.8 | 1.21 | 2,134 | 3 |
Mungari | Underground | 1.80 | 1.7 | 5.39 | 295 | 10.1 | 4.26 | 1,387 | 9.4 | 3.58 | 1,086 | 21.2 | 4.05 | 2,767 | 3 |
Mungari1 | Total | 1.7 | 5.39 | 295 | 54.5 | 1.75 | 3,063 | 19.9 | 2.41 | 1,544 | 76.1 | 2.00 | 4,902 | 3 | |
Mt Rawdon1 | Total | 0.21 | 6.3 | 0.32 | 65 | 27.2 | 0.55 | 481 | 5.7 | 0.46 | 84 | 39.2 | 0.50 | 630 | 4 |
Ernest Henry2 | Total | 13.3 | 0.69 | 294 | 32.2 | 0.78 | 808 | 25.9 | 0.69 | 572 | 71.4 | 0.73 | 1,674 | 5 | |
Marsden | Total | 0.20 | – | – | – | 119.8 | 0.27 | 1,031 | 3.1 | 0.22 | 22 | 123.0 | 0.27 | 1,053 | 1 |
Total | 46.1 | 0.69 | 1,025 | 495.5 | 1.26 | 20,017 | 127.0 | 2.10 | 8,577 | 668.5 | 1.38 | 29,619 |
Gold Reserves Statement | Proved | Probable | Total Reserve | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Project | Type | Cut-Off | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | Tonnes (Million) | Gold Grade (g/t) | Gold Metal (koz) | CP |
Cowal1 | Open Pit | 0.45 | 23.9 | 0.46 | 356 | 99.7 | 0.99 | 3,164 | 123.6 | 0.89 | 3,520 | 1 |
Cowal | Underground | 1.80 | – | – | – | 14.4 | 2.31 | 1,069 | 14.4 | 2.31 | 1,069 | 2 |
Cowal | Total | 23.9 | 0.46 | 356 | 114.1 | 1.15 | 4,233 | 138.0 | 1.03 | 4,589 | ||
Red Lake3 | Total | 4.50 | – | – | – | 13.1 | 7.00 | 2,935 | 13.1 | 7.00 | 2,935 | 3 |
Mungari4 | Underground | 4.82 | 0.8 | 4.89 | 132 | 2.6 | 4.33 | 365 | 3.5 | 4.46 | 498 | 4 |
Mungari5 | Open Pit | 0.73 | 3.0 | 1.54 | 149 | 14.2 | 1.29 | 587 | 17.2 | 1.33 | 736 | 5 |
Mungari1 | Total | 3.9 | 2.27 | 282 | 16.8 | 1.76 | 952 | 20.6 | 1.86 | 1,234 | ||
Mt Rawdon1 | Open pit | 0.33 | 3.1 | 0.39 | 40 | 12.6 | 0.64 | 260 | 15.7 | 0.59 | 300 | 6 |
Ernest Henry2 | Underground | 9.8 | 0.77 | 241 | 19.2 | 0.35 | 217 | 29.0 | 0.49 | 459 | 7 | |
Marsden | Open Pit | 0.30 | – | – | – | 65.2 | 0.39 | 817 | 65.2 | 0.39 | 817 | 8 |
Total | 40.7 | 0.70 | 919 | 241.0 | 1.22 | 9,414 | 281.7 | 1.14 | 10,333 |
Copper Resources Statement | Measured | Indicated | Inferred | Total Resources | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Project | Type | Cut-Off | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | CP |
Marsden | Total | 0.2 | – | – | – | 119.8 | 0.46 | 553 | 3.1 | 0.24 | 7 | 123.0 | 0.46 | 560 | 1 |
Ernest Henry | Total | 0.7 | 13.3 | 1.25 | 165 | 32.2 | 1.29 | 416 | 25.9 | 1.17 | 304 | 71.4 | 1.24 | 885 | 2 |
Total | 13.3 | 1.25 | 165 | 152.1 | 0.64 | 969 | 29.0 | 1.07 | 311 | 194.4 | 0.74 | 1445 | . |
Copper Reserves Statement | Proved | Probable | Total Reserve | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Project | Type | Cut-Off | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | Tonnes (Million) | Copper Grade (%) | Copper Metal (kt) | CP |
Marsden | Total | 0.3 | – | – | – | 65.2 | 0.57 | 371 | 65.2 | 0.57 | 371 | 1 |
Ernest Henry2 | Total | 0.7 | 9.8 | 1.41 | 139 | 19.2 | 0.68 | 130 | 29.0 | 0.93 | 269 | 2 |
Total | 9.8 | 1.41 | 139 | 84.4 | 0.59 | 501 | 94.2 | 0.68 | 640 |
General Notes:
Data is reported to significant figures to reflect appropriate precision and may not sum precisely due to rounding.
Mineral Resources are reported inclusive of Ore Reserves. Estimates undertaken by Evolution include all exploration and resource definition drilling information up to 31 December 2021 and have been depleted for mining to 31 December 2021.
Gold Mineral Resource
- Includes stockpiles
- Ernest Henry Operations reported Mineral Resources are above a 0.7% Cu cut-off within an interpreted 0.7% Cu mineralised envelope
- Red Lake Mineral Resource cut-off is 3.3g/t Au except for Cochenour (3.0g/t Au) and HG Young (3.2g/t Au) deposit
- Mungari Underground Mineral Resource cut-offs vary from 1.56g/t Au to 2.61g/t Au per deposit. The average underground cut-off is 1.8g/t Au. The Mungari Mineral Resource estimate excludes the Falcon deposit (142koz) held by the East Kundana Joint Venture (Evolution Mining 51%, Tribune Resources Ltd 36.75% and Rand Mining (12.25%). Information on the Falcon deposit is provided in Northern Star Resources ASX release titled “Strong Growth in Reserves and Resources” dated 3 May 2021 and available to view at nsrltd.com
Gold Ore Reserve
- Includes stockpiles
- Ernest Henry Operations reported Ore Reserve uses Glencore price assumptions: Gold Price ($US/oz): 1300, Copper Price ($US/t): 6500, Exchange Rate (AU:US): 0.75. December 2021 Ore Reserves reported above 0.7% Cu
- Red Lake Ore Reserve cut-off is 4.5g/t Au except for Cochenour and Lower Campbell (4.1g/t Au), HG Young (3.0g/t Au) and Upper Campbell (2.5g/t Au)
- Mungari Underground Ore Reserve cut-off is 4.82g/t Au except for Kundana (4.08g/t Au) and Frog’s Leg (2.90g/t Au)
- Mungari Open Pit Ore Reserve cut-offs vary from 0.61g/t Au to 0.80g/t Au per deposit. The average open pit cut-off is 0.73g/t Au
This information is extracted from the ASX release entitled “Annual Mineral Resources and Ore Reserves Statement” released to the ASX on 16 February 2022.
Group Gold Mineral Resources Competent Person (CP) Notes refer to 1. James Biggam; 2. Jason Krauss; 3. Brad Daddow; 4. Justin Watson; 5. Aaron Meakin (CSA Global)
Group Gold Ore Reserve Competent Person (CP) Notes refer to 1. Dean Basile (Mining One); 2. Joshua Northfield; 3. Brad Armstrong; 4. Peter Merry; 5. Chris Honey; 6. Martin Sonogan; 7. Mike Corbett (Glencore); 8. Anton Kruger
Group Copper Mineral Resources Competent Person (CP) Notes refer to 1. James Biggam; 2. Aaron Meakin (CSA)
Group Copper Ore Reserve Competent Person (CP) Notes refer to 1. Anton Kruger; 2. Michael Corbett (Glencore)