Constancia Operations
Mineral Reserve and Resource
Estimates1,2,3,4
|
Tonnes
|
Cu Grade
(%)
|
Mo Grade
(g/t)
|
Au Grade
(g/t)
|
Ag Grade
(g/t)
|
|
Constancia Reserves
|
| Proven |
411,200,000 |
0.28 |
79 |
0.041 |
2.85 |
| Probable |
46,500,000 |
0.23 |
79 |
0.038 |
2.84 |
|
Total Proven and Probable - Constancia
|
457,700,000
|
0.28
|
79
|
0.040
|
2.85
|
|
Pampacancha Reserves
|
| Proven |
34,100,000 |
0.59 |
153 |
0.320 |
4.98 |
| Probable |
300,000 |
0.17 |
306 |
0.119 |
2.29 |
| Total Proven and Probable - Pampacancha |
34,400,000 |
0.59 |
155 |
0.319 |
4.96 |
|
Total Proven and Probable
|
492,100,000
|
0.30
|
85
|
0.060
|
2.99
|
|
Constancia Resources
|
| Measured |
118,400,000 |
0.20 |
62 |
0.036 |
1.86 |
| Indicated |
140,700,000 |
0.23 |
73 |
0.040 |
2.20 |
| Inferred - Open Pit |
56,700,000 |
0.27 |
82 |
0.044 |
1.86 |
| Inferred - Underground |
6,500,000 |
1.20 |
69 |
0.137 |
8.62 |
|
Pampacancha Resources
|
| Measured |
9,100,000 |
0.35 |
103 |
0.230 |
6.01 |
| Indicated |
300,000 |
0.16 |
173 |
0.173 |
2.62 |
| Inferred |
900,000 |
0.15 |
118 |
0.103 |
2.86 |
|
Total Measured and Indicated
|
268,500,000
|
0.22
|
69
|
0.045
|
2.18
|
|
Total Inferred
|
64,100,000
|
0.36
|
81
|
0.054
|
2.56
|
Note: totals may not add up correctly due to rounding.
1Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.
2Mineral resources are based on resource pit design and do not include factors for mining recovery or dilution.
3The open pit mineral reserves and resources are estimated using a minimum NSR cut-off of $6.40 per tonne and assuming metallurgical recoveries (applied by ore type) of 86% for copper on average for the life of mine, while the underground inferred resources at Constancia Norte are based on a 0.65% copper cut-off grade.
4 Long-term metal prices of $3.60 per pound copper, $12.00 per pound molybdenum, $1,650 per ounce gold, and $22.00 per ounce silver were used to estimate mineral reserves and resources.
Note: totals may not add up correctly due to rounding.
1 Mineral resource estimates are exclusive of mineral reserves. Mineral resources are not mineral reserves as they do not have demonstrated economic viability.
2 Mineral reserve estimates have been calculated using assumed long-term metal prices of $3.75 per pound copper, $1,650 per ounce gold and $22.00 per ounce silver. Mineral resource estimates have been calculated using assumed long-term metal prices of $4.00 per pound copper, $1,650 per ounce gold and $22.00 per ounce silver.
3 Mineral resource estimates tonnes and grades constrained to a Lerch Grossman revenue factor 1 pit shell.
4 Mineral reserves have an effective date of December 1, 2023, but were generated excluding the measured and indicated mineral resource estimates planned to be mined and milled in the month of December 2023. Mineral reserves are reported using an NSR cut-off value of $5.67 that meet a minimum 0.10% Cu grade.
Lalor Mine and 1901 Deposit
Mineral Reserve and Resource Estimates1,2,3,4,5,6,7
|
Tonnes
|
Au Grade
(g/t)
|
Zn Grade
(%)
|
Cu Grade
(%)
|
Ag Grade
(g/t)
|
|
Base Metal Zone Reserves
|
| Proven - Lalor |
5,977,000 |
2.5 |
5.17 |
0.42 |
28.7 |
| Proven - 1901 |
1,278,000 |
2.2 |
8.14 |
0.30 |
27.4 |
| Probable - Lalor |
522,000 |
2.6 |
4.59 |
0.36 |
30.3 |
| Probable - 1901 |
245,000 |
0.8 |
10.70 |
0.30 |
25.2 |
| Total Proven and Probable - Base Metal |
8,022,000 |
2.5 |
5.77 |
0.39 |
28.5 |
| Gold Zone Reserves |
| Proven - Lalor |
3,345,000 |
5.1 |
0.77 |
0.54 |
29.2 |
| Proven - 1901 |
101,000 |
2.9 |
1.32 |
1.00 |
19.2 |
| Probable - Lalor |
3,779,000 |
5.5 |
0.41 |
1.12 |
25.6 |
| Probable - 1901 |
54,000 |
1.7 |
0.45 |
1.82 |
5.6 |
| Total Proven and Probable - Gold |
7,279,000 |
5.3 |
0.59 |
0.86 |
27.0 |
|
Total Proven and Probable (Base Metal and Gold)
|
15,303,000
|
3.8
|
3.31
|
0.61
|
27.8
|
|
Base Metal Zone Resources
|
| Inferred - Lalor |
1,947,000 |
1.7 |
5.56 |
0.34 |
32.0 |
| Inferred - 1901 |
312,000 |
1.5 |
5.86 |
0.19 |
32.0 |
| Total Inferred - Base Metal |
2,259,000 |
1.7 |
5.60 |
0.32 |
32.0 |
|
Gold Zone Resources
|
| Inferred - Lalor |
3,764,000 |
5.0 |
0.27 |
1.68 |
26.4 |
| Inferred - 1901 |
1,599,000 |
5.5 |
0.30 |
0.85 |
16.5 |
| Total Inferred - Gold |
5,363,000 |
5.1 |
0.28 |
1.43 |
23.5 |
|
Total Inferred (Base Metal and Gold)
|
7,622,000
|
4.1
|
1.86
|
1.10
|
26.0
|
Note: totals may not add up correctly due to rounding.
1 Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.
2 Mineral resources do not include factors for mining recovery or dilution.
3 Base metal mineral resources are estimated based on the assumption that they would be processed at the Stall concentrator while gold mineral resources are estimated based on the assumption that they would be processed at the New Britannia concentrator.
4 Long-term metal prices of $1.20 per pound zinc, $1,650 per ounce gold, $3.60 per pound copper, and $22.00 per ounce silver with an exchange rate of 1.33 C$/US$ were used to estimate mineral reserves and resources.
5 Lalor mineral reserves and resources are estimated using NSR cut-off ranging from C$137 to C$168 per tonne assuming a long hole mining method and depending on the mill destination.
6 Individual stope gold grades at Lalor were capped at 10 grams per tonne as a prudent estimate until reserves-to-mill reconciliations can be developed to support the recovery of higher-grade gold. This capping method resulted in an approximate 3% reduction in the overall gold reserve grade at Lalor.
7 1901 mineral reserves and resources are estimated using a minimum NSR cut-off of C$166 per tonne assuming the material is mined via post pillar cut-and-fill methods and is processed at the Stall mill.
Note: totals may not add up correctly due to rounding.
1 Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.
2 Mineral resources do not include factors for mining recovery or dilution.
3 Gold mineral resources are estimated based on the assumption that they would be processed at the New Britannia concentrator.
4 Long-term metal prices of $1.15 per pound zinc, $1,500 per ounce gold, $3.45 per pound copper, and $20.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to confirm the economic viability of the mineral reserve estimates.
5 WIM mineral reserves are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 98% for copper, 88% for gold and 70% for silver based on processing through New Britannia mill's flotation and tails leach circuits.
6 3 Zone mineral reserves are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 85% for gold based on processing through New Britannia mill's leach circuit.
7 New Britannia mineral resource estimates have been reported at a minimum true width of 1.5 metres and with a cut-off grade varying from 2 grams per tonne (at the lower part of New Britannia) to 3.5 grams per tonne (at the upper part of New Britannia).
8 Mineral reserves and resources were initially estimated using metal price assumptions that vary marginally over the assumptions used to estimate mineral reserves at Lalor. In the Qualified Person’s opinion, the combined impact of these small variations does not have any impact on the mineral reserve and resource estimates.
Note: totals may not add up correctly due to rounding.
1 Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.
2 Mineral resources do not include factors for mining recovery or dilution.
3 Base metal mineral resources are estimated based on the assumption that they would be processed at the Stall concentrator.
4 Watts mineral resources are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 90% for copper, 80% for zinc, 70% for gold and 70% for silver.
5 Pen II mineral resources are estimated using a minimum NSR cut-off of C$75 per tonne.
6 Watts and Pen II mineral resources were initially estimated using metal price assumptions that vary marginally over the assumptions used to estimate mineral resources at Lalor. In the Qualified Person’s opinion, the combined impact of these small variations does not have any impact on the mineral resource estimates.
7 Includes 100% of the Talbot mineral resources reported by Rockcliff Metals Corp. in its 2020 NI 43-101 technical report published on SEDAR. Hudbay currently owns a 51% interest in the Talbot project.
Copper World Project
Mineral Resource Estimates1,2,3,4,5
|
Tonnes
|
Cu Grade
(%)
|
CuSS Grade
(%)
|
Mo Grade
(g/t)
|
Ag Grade
(g/t)
|
Ag Grade
(g/t)
|
| Proven reserves |
319,000,000 |
0.54 |
0.11 |
110 |
0.03 |
5.68 |
| Probable reserves |
66,000,000 |
0.52 |
0.14 |
96 |
0.02 |
4.31 |
| Total Proven and Probable Reserves |
385,000,000 |
0.52 |
0.12 |
108 |
0.02 |
5.44 |
| Measured resources |
888,000,000 |
0.43 |
0.10 |
121 |
0.02 |
4.46 |
| Indicated resources |
317,000,000 |
0.38 |
0.10 |
108 |
0.02 |
3.52 |
| Total Resources |
| Measured and Indicated |
1,205,000,000 |
0.42 |
0.10 |
117 |
0.02 |
4.22 |
| Inferred |
275,000,000 |
0.32 |
0.10 |
106 |
0.01 |
2.82 |
Note: totals may not add up correctly due to rounding.
1 Mineral resource estimates are inclusive of mineral reserves and have been calculated using assumed long-term metal prices of $3.75 per pound copper, $12.00 per pound molybdenum, $1,650 per ounce gold and $22.00 per ounce silver.
2 Mineral resource estimates that are not mineral reserves do not have demonstrated economic viability. Mineral resource estimates are based on resource pit design and do not include factors for mining recovery or dilution.
3 Mineral resource estimates are constrained to a Lerch Grossman pit shell with a revenue factor of 1.0 or inside the reserve pit.
4 Mineral resource estimates are using a 0.1% soluble copper cut-off grade and an oxidation ratio higher than 50% for leach material.
Mason Project
Mineral Resource Estimates1,2,3,4,5
|
Tonnes |
Cu Grade
(%) |
Mo Grade
(g/t) |
Au Grade
(g/t) |
Ag Grade
(g/t) |
| Measured |
1,417,000,000 |
0.29 |
59 |
0.031 |
0.66 |
| Indicated |
801,000,000 |
0.30 |
80 |
0.025 |
0.57 |
| Total Measured and Indicated |
2,219,000,000 |
0.29 |
67 |
0.029 |
0.63 |
| Inferred |
237,000,000 |
0.24 |
78 |
0.033 |
0.73 |
Note: totals may not add up correctly due to rounding.
1 Mineral resource estimates that are not mineral reserves do not have demonstrated economic viability.
2 Mineral resource estimates do not include factors for mining recovery or dilution.
3 Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver were used to estimate mineral resources.
4 Mineral resources are estimated using a minimum NSR cut-off of $6.25 per tonne.
5 Mineral resources are based on resource pit designs containing measured, indicated, and inferred mineral resources.
Llaguen
Mineral Resource Estimate1,2,3,4,5,6
|
Metric Tonnes
|
Cu Grade
(%)
|
Mo Grade
(g/t)
|
Au Grade
(g/t)
|
Ag Grade
(g/t)
|
CuEq Grade
(%)
|
Indicated Global
(>= 0.14% Cu) |
271,000,000 |
0.33 |
218 |
0.033 |
2.04 |
0.42 |
Including Indicated High-grade
(>= 0.30% Cu) |
113,000,000 |
0.49 |
261 |
0.046 |
2.73 |
0.60 |
Inferred Global
(>= 0.14% Cu) |
83,000,000 |
0.24 |
127 |
0.024 |
1.47 |
0.30 |
Including Inferred High-grade
(>= 0.30% Cu) |
16,000,000 |
0.45 |
141 |
0.038 |
2.60 |
0.52 |
1CIM definitions were followed for the estimation of mineral resources. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
2Mineral resources are reported within an economic envelope defined by a pit shell optimization algorithm. This pit shell is defined by a revenue factor of 0.33 assuming operating costs adjusted from Hudbay’s Constancia open pit operation.
3Long-term metal prices of $3.60 per pound copper, $11.00 per pound molybdenum, $1,650 per ounce gold and $22.00 per ounce silver were used for the estimation of mineral resources.
4Metal recovery estimates assume that this mineralization would be processed at a combination of facilities, including copper and molybdenum flotation.
5Copper-equivalent (“CuEq”) grade is calculated assuming 85% copper recovery, 80% molybdenum recovery, 60% gold recovery and 60% silver recovery.
6Specific gravity measurements were estimated by industry standard laboratory measurements.
Qualified Person and NI 43-101
The technical and scientific information in this news release related to the company’s material mineral projects has been approved by Olivier Tavchandjian, P. Geo, Senior Vice President, Exploration and Technical Services. Mr. Tavchandjian is a qualified
person pursuant to NI 43‑101. Additional details on the company’s material mineral projects, including a year-over-year reconciliation of reserves and resources, is included in Hudbay's Annual Information Form for the year ended December 31, 2022
(the “AIF”), which is available on SEDAR at www.sedar.com.