Current mineral reserves and resources as of January 1, 2020
Mineral Reserve and Resource
Estimates1
|
Tonnes
|
Cu Grade (%)
|
Mo Grade (g/t)
|
Au Grade (g/t)
|
Ag Grade (g/t)
|
Constancia Reserves
|
Proven |
408,800,000 |
0.28 |
85 |
0.035 |
2.76 |
Probable |
77,500,000 |
0.27 |
70 |
0.044 |
3.58 |
Total proven and probable - Constancia
|
486,300,000
|
0.28
|
83
|
0.036
|
2.89
|
Pampacancha Reserves
|
Proven |
32,400,000 |
0.59 |
178 |
0.368 |
4.48 |
Probable |
7,500,000 |
0.62 |
173 |
0.325 |
5.75 |
Total proven and probable - Pampacancha |
39,900,000 |
0.60 |
177 |
0.360 |
4.72 |
Total proven and probable
|
526,600,000
|
0.30
|
90
|
0.061
|
3.03
|
Constancia Resources
|
Measured |
122,700,000 |
0.18 |
55 |
0.028 |
1.77 |
Indicated |
154,300,000 |
0.20 |
65 |
0.033 |
1.87 |
Inferred |
83,100,000 |
0.18 |
43 |
0.036 |
3.39 |
Pampacancha Resources
|
Measured |
11,400,000 |
0.41 |
101 |
0.245 |
4.95 |
Indicated |
6,000,000 |
0.35 |
84 |
0.285 |
5.16 |
Inferred |
10,100,000 |
0.14 |
143 |
0.233 |
3.86 |
Total measured and indicated
|
294,400,000
|
0.20
|
63
|
0.045
|
2.01
|
Total inferred
|
93,200,000
|
0.18
|
54
|
0.057
|
3.44
|
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. Mineral reserves and resources calculated using metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $17.00 per ounce silver and $1,375 per ounce gold. The Constancia and Pampacancha reserve pits consist of operational pits of proven and probable reserves and are based on metal prices noted, metallurgical recoveries applied by ore type (between 84.4% to 90.5%), and processing costs of $4.54 per tonne milled, general and administrative costs of $1.60 per tonne milled and mining costs of $1.30 and $1.35 per tonne moved (waste and ore, respectively).