Current mineral reserves and resources as of January 1, 2022
Mineral Reserve and Resource
Estimates1,2,3,4,5
|
Tonnes
|
Cu Grade (%)
|
Mo Grade (g/t)
|
Au Grade (g/t)
|
Ag Grade (g/t)
|
Constancia Reserves
|
Proven |
426,200,000 |
0.29 |
82 |
0.042 |
2.90 |
Probable |
56,800,000 |
0.24 |
69 |
0.043 |
3.06 |
Total proven and probable - Constancia
|
483,000,000
|
0.28
|
80
|
0.042
|
2.92
|
Pampacancha Reserves
|
Proven |
36,400,000 |
0.65 |
177 |
0.368 |
5.26 |
Probable |
1,600,000 |
0.52 |
234 |
0.259 |
6.33 |
Total proven and probable - Pampacancha |
38,000,000 |
0.65 |
179 |
0.364 |
5.30 |
Total proven and probable
|
521,000,000
|
0.31
|
87
|
0.065
|
3.09
|
Constancia Resources
|
Measured |
123,800,000 |
0.22 |
64 |
0.038 |
2.07 |
Indicated |
118,200,000 |
0.22 |
65 |
0.037 |
2.08 |
Inferred - Open Pit |
51,000,000 |
0.30 |
77 |
0.054 |
2.69 |
Inferred - Underground |
6,490,000 |
1.20 |
69 |
0.137 |
8.62 |
Pampacancha Resources
|
Measured |
9,200,000 |
0.37 |
63 |
0.293 |
5.71 |
Indicated |
1,500,000 |
0.39 |
152 |
0.223 |
6.63 |
Inferred |
6,800,000 |
0.33 |
102 |
0.286 |
5.01 |
Total measured and indicated
|
252,700,000
|
0.23
|
65
|
0.048
|
2.23
|
Total inferred
|
64,300,000
|
0.40
|
79
|
0.087
|
3.53
|
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 in the above tables do not include mining dilution or recovery factors.
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.
4Long-term metal prices of $3.45 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $20.00 per ounce silver were used to estimate mineral reserves and resources.
5Mineral resources are based on resource pit designs containing measured, indicated, and inferred mineral resources.