Ore Reserve and Mineral Resource Statements
ORE RESERVE AND MINERAL RESOURCE ESTIMATE
Ore Reserve Estimate – December 2022
Gruyere Joint Venture – 100% basis | Gold Road Attributable | |||||
Project Name / Category | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) |
Gruyere Open Pit Total | 91.82 | 1.27 | 3.76 | 45.91 | 1.27 | 1.88 |
Proved | 19.83 | 1.06 | 0.67 | 9.92 | 1.06 | 0.34 |
Probable | 71.99 | 1.33 | 3.08 | 35.99 | 1.33 | 1.54 |
Golden Highway Total | 6.96 | 1.29 | 0.29 | 3.48 | 1.29 | 0.14 |
Proved | – | – | – | – | – | – |
Probable | 6.96 | 1.29 | 0.29 | 3.48 | 1.29 | 0.14 |
Total Gruyere JV | 98.78 | 1.27 | 4.05 | 49.39 | 1.27 | 2.02 |
Proved | 19.83 | 1.06 | 0.67 | 9.92 | 1.06 | 0.34 |
Probable | 78.95 | 1.33 | 3.37 | 39.47 | 1.33 | 1.69 |
Gruyere JV Mineral Resource Estimate – December 2022
Gruyere Project Joint Venture – 100% basis | Gold Road Attributable | |||||
Project Name / Category | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) |
Gruyere Open Pit Total | 136.99 | 1.33 | 5.88 | 68.49 | 1.33 | 2.94 |
Measured | 19.95 | 1.08 | 0.69 | 9.98 | 1.08 | 0.35 |
Indicated | 93.21 | 1.37 | 4.10 | 46.60 | 1.37 | 2.05 |
Measured and Indicated | 113.16 | 1.32 | 4.80 | 56.58 | 1.32 | 2.40 |
Inferred | 23.83 | 1.41 | 1.08 | 11.92 | 1.41 | 0.54 |
Golden Highway + YAM14 OP Total | 15.51 | 1.43 | 0.71 | 7.76 | 1.43 | 0.36 |
Indicated | 10.13 | 1.50 | 0.49 | 5.07 | 1.50 | 0.24 |
Measured and Indicated | 10.13 | 1.50 | 0.49 | 5.07 | 1.50 | 0.24 |
Inferred | 5.38 | 1.30 | 0.23 | 2.69 | 1.30 | 0.11 |
Central Bore UG Total Inferred | 0.24 | 13.05 | 0.10 | 0.12 | 13.05 | 0.05 |
Total Gruyere JV | 152.74 | 1.36 | 6.69 | 76.37 | 1.36 | 3.34 |
Measured | 19.95 | 1.08 | 0.69 | 9.98 | 1.08 | 0.35 |
Indicated | 103.34 | 1.38 | 4.59 | 51.67 | 1.38 | 2.30 |
Measured and Indicated | 123.29 | 1.33 | 5.28 | 61.65 | 1.33 | 2.64 |
Inferred | 29.45 | 1.48 | 1.41 | 14.73 | 1.48 | 0.70 |
Gruyere Underground Mineral Resource Estimate – December 2022
Gold Road Attributable | |||
Project Name / Category | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) |
Gruyere UG Total | 20.99 | 1.40 | 0.95 |
Inferred | 20.99 | 1.40 | 0.95 |
Gold Road 100% Yamarna Mineral Resource Estimate – December 2022
Gold Road Attributable | |||
Project Name / Category | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) |
Renegade OP – Inferred | 1.86 | 1.13 | 0.07 |
Gilmour OP | 2.29 | 2.80 | 0.21 |
Indicated | 0.59 | 6.78 | 0.13 |
Inferred | 1.70 | 1.42 | 0.08 |
Gilmour UG | 0.59 | 5.14 | 0.10 |
Indicated | 0.06 | 4.17 | 0.10 |
Inferred | 0.53 | 5.25 | 0.09 |
Smokebush OP – Inferred | 1.09 | 2.61 | 0.09 |
Warbler OP – Inferred | 0.62 | 2.14 | 0.04 |
Total Gold Road 100% Owned | 6.45 | 2.44 | 0.51 |
Indicated | 0.65 | 6.55 | 0.14 |
Inferred | 5.80 | 1.98 | 0.37 |
Gold Road Attributable Mineral Resource Estimate – December 2022
Gold Road Attributable | |||
Project Name / Category | Tonnes (Mt) | Grade (g/t Au) | Contained Metal (Moz Au) |
Total Gold Road Attributable | 103.82 | 1.44 | 4.79 |
Measured | 9.98 | 1.08 | 0.35 |
Indicated | 52.32 | 1.45 | 2.43 |
Measured and Indicated | 62.30 | 1.39 | 2.78 |
Inferred | 41.52 | 1.51 | 2.02 |
Notes for Ore Reserve Statement December 2022
- All Ore Reserves are completed in accordance with the 2012 JORC Code Edition
- All figures are rounded to reflect appropriate levels of confidence. Apparent differences may occur due to rounding.
- The Gruyere JV is a 50:50 joint venture between Gold Road and Gruyere Mining Company Pty Limited, a wholly owned Australian subsidiary of Gold Fields Ltd. Figures are reported on a 100% basis unless otherwise specified, 50% is attributable to Gold Road
- Gold Road holds an uncapped 1.5% net smelter return royalty on Gold Fields’ share of production from the Gruyere JV once total gold production exceeds 2 million ounces
- The pit design for reporting the Gruyere Ore Reserve is derived from mining, processing and geotechnical parameters as defined by operational studies, PFS level studies completed between 2019 and 2021 and the 2016 FS. The Ore Reserve is reported using the 2021 Mineral Resource model constrained within the pit design (which is derived from a A$1,575 per ounce optimisation) and with Ore Reserves reported at A$1,750 per ounce gold price
- The Ore Reserve for the Golden Highway Deposits which include Attila, Argos, Montagne, and Alaric is constrained within a A$1,750 per ounce mine design derived from mining, processing and geotechnical parameters as defined by 2020 PFS and operational studies
- The Ore Reserve is evaluated using variable cut-off grades (fresh, transitional and oxide respectively): Gruyere – 0.55, 0.54, 0.51 g/t Au. Attila – 0.69, 0.62, 0.58 g/t Au. Argos – 0.64, 0.64, 0.62 g/t Au. Montagne – 0.67, 0.60, 0.59 g/t Au. Alaric – 0.68, 0.68, 0.66 g/t Au
- Ore block tonnage dilution and mining recovery estimates: Gruyere – 4% and 99%. Attila – 21% and 99%. Argos – 17% and 89%. Montagne – 15% and 94%. Alaric – 31% and 99%
Notes for Mineral Resources Statements December 2022
- All Mineral Resources are completed in accordance with the JORC Code 2012 Edition
- All figures are rounded to reflect appropriate levels of confidence. Apparent differences may occur due to rounding
- Mineral Resources are inclusive of Ore Reserves. Gruyere Measured category includes Surface Stockpiles (6.3 Mt at 0.73 g/t Au for 145,000 ounces). Mineral Resources depleted for mining
- The Gruyere JV is a 50:50 joint venture between Gold Road and Gruyere Mining Company Pty Ltd, a wholly owned Australian subsidiary of Gold Fields Ltd. Figures are reported on a 100% basis unless otherwise specified, 50% is attributable to Gold Road. Gold Road’s 50% attributable Mineral Resource for Gruyere Underground is reported independently of the Gruyere JV
- The Gruyere and Golden Highway (except Orleans) Open Pit Mineral Resources are reported between 0.45 to 0.58 (oxide) and 0.48 to 0.61 (fresh) g/t Au cut-off grade allowing for dilution, processing costs, recovery and haulage to the Gruyere Mill. The Orleans and YAM14 Open Pit Mineral Resources are reported at 0.4 g/t Au cut-off grade and the Renegade, Gilmour, Smokebush and Warbler Mineral Resource are reported at 0.5 g/t Au cut-off grade allowing for processing costs, recovery and haulage to the Gruyere Mill
- All Open Pit Mineral Resources are constrained within a A$2,000 per ounce (Gruyere JV) or a A$2,200 per ounce (Gold Road 100%) optimised pit shell derived from mining, processing and geotechnical parameters from the Golden Highway PFS, the Gruyere FS and current Gruyere JV operational cost data
- The Underground Mineral Resource at Gruyere was evaluated by Gold Road on the same geology model used to estimate the December 2022 Open Pit Mineral Resource
- The Underground Mineral Resource at Gruyere is constrained by Mineable Shape Optimiser (MSO) shapes of dimensions consistent with underground mass mining methods. The MSO shapes are optimised at cut-off grades based on benchmarked mining costs, current Gruyere operating costs and processing recoveries at a A$2,000 per ounce gold price.
- Underground Mineral Resources at Gruyere considered appropriate for potential mass mining exploitation in the Central Zone are constrained within MSO shapes of 25 metre minimum mining width in a transverse orientation and 25 metre sub-level interval, and are optimised to a cut-off grade of 1.0 g/t Au
- Underground Mineral Resources at Gruyere considered appropriate for potential mass mining exploitation in the Northern Zone are constrained within MSO shapes of 5 metre minimum mining width in longitudinal orientation and 25 metre sub-level interval, and are optimised to a cut-off grade of 1.5 g/t Au
- Underground Mineral Resources at Central Bore are constrained by a 1.5 metre minimum stope width that are optimised to a 3.5 g/t Au cut-off reflective of a A$1,850 per ounce gold price
- Underground Mineral Resources at Gilmour are constrained by an area defined by a 2.0 metre minimum stope width and a 3.0 g/t Au cut-off reflective of a A$2,200 per ounce gold price
- Underground Mineral Resources are reported with diluted tonnages and grades based on minimum stope widths
- All Mineral Resources are completed in accordance with the JORC Code 2012 Edition
- All figures are rounded to reflect appropriate levels of confidence. Apparent differences may occur due to rounding
- Mineral Resources are inclusive of Ore Reserves. Gruyere Measured category includes Surface Stockpiles (6.3 Mt at 0.73 g/t Au for 145,000 ounces). Mineral Resources depleted for mining
- The Gruyere JV is a 50:50 joint venture between Gold Road and Gruyere Mining Company Pty Ltd, a wholly owned Australian subsidiary of Gold Fields Ltd. Figures are reported on a 100% basis unless otherwise specified, 50% is attributable to Gold Road. Gold Road’s 50% attributable Mineral Resource for Gruyere Underground is reported independently of the Gruyere JV
- The Gruyere and Golden Highway (except Orleans) Open Pit Mineral Resources are reported between 0.45 to 0.58 (oxide) and 0.48 to 0.61 (fresh) g/t Au cut-off grade allowing for dilution, processing costs, recovery and haulage to the Gruyere Mill. The Orleans and YAM14 Open Pit Mineral Resources are reported at 0.4 g/t Au cut-off grade and the Renegade, Gilmour, Smokebush and Warbler Mineral Resource are reported at 0.5 g/t Au cut-off grade allowing for processing costs, recovery and haulage to the Gruyere Mill
- All Open Pit Mineral Resources are constrained within a A$2,000 per ounce (Gruyere JV) or a A$2,200 per ounce (Gold Road 100%) optimised pit shell derived from mining, processing and geotechnical parameters from the Golden Highway PFS, the Gruyere FS and current Gruyere JV operational cost data
- The Underground Mineral Resource at Gruyere was evaluated by Gold Road on the same geology model used to estimate the December 2022 Open Pit Mineral Resource
- The Underground Mineral Resource at Gruyere is constrained by Mineable Shape Optimiser (MSO) shapes of dimensions consistent with underground mass mining methods. The MSO shapes are optimised at cut-off grades based on benchmarked mining costs, current Gruyere operating costs and processing recoveries at a A$2,000 per ounce gold price.
- Underground Mineral Resources at Gruyere considered appropriate for potential mass mining exploitation in the Central Zone are constrained within MSO shapes of 25 metre minimum mining width in a transverse orientation and 25 metre sub-level interval, and are optimised to a cut-off grade of 1.0 g/t Au
- Underground Mineral Resources at Gruyere considered appropriate for potential mass mining exploitation in the Northern Zone are constrained within MSO shapes of 5 metre minimum mining width in longitudinal orientation and 25 metre sub-level interval, and are optimised to a cut-off grade of 1.5 g/t Au
- Underground Mineral Resources at Central Bore are constrained by a 1.5 metre minimum stope width that are optimised to a 3.5 g/t Au cut-off reflective of a A$1,850 per ounce gold price
- Underground Mineral Resources at Gilmour are constrained by an area defined by a 2.0 metre minimum stope width and a 3.0 g/t Au cut-off reflective of a A$2,200 per ounce gold price
- Underground Mineral Resources are reported with diluted tonnages and grades based on minimum stope widths