Pinto Valley Mineral Reserves, Remaining at March 31, 2021
Classification |
Tonnes (millions) |
% Cu |
% Mo |
Contained Cu (kt) |
Contained Mo (kt) |
Proven |
241.6 |
0.34 |
0.007 |
831 |
16 |
Probable |
139.4 |
0.28 |
0.006 |
398 |
8 |
Total P+P |
381.0 |
0.32 |
0.006 |
1,229 |
24 |
NOTE: The Mineral Reserve has an effective date of March 31, 2021 and was prepared by Clay Craig, P.Eng., Manager, Mining and Evaluations at Capstone Copper Corp. The economic assumptions include the following: $3.00/lb Cu and $10.00/lb Mo, 86.0% average Cu recovery, 8.5% average Mo recovery, $1.68/tonne average mining costs, $1.13/tonne G&A costs, $0.88/tonne Ops Support costs, $4.67/ton milling costs, and pit slopes by rock type. The Mineral Reserve is reported at a variable cut-off ranging from 0.17% to 0.21% copper. Tonnage measurements are in metric units. Copper and molybdenum grades are reported as percentages. Contained metal is reported as million pounds. Rounding may result in apparent summation differences between tonnes, grade and contained metal.
Pinto Valley Mineral Resource (inclusive of Mineral Reserves) at 0.14% Copper Cutoff, as of March 31, 2021
Classification |
Tonnes (millions) |
% Cu |
% Mo |
Contained Cu (kt) |
Contained Mo (kt) |
Measured (M) |
619.9 |
0.33 |
0.006 |
2,015 |
38 |
Indicated (I) |
782.5 |
0.26 |
0.005 |
2,038 |
40 |
Total M & I |
1,402.3 |
0.29 |
0.006 |
4,053 |
77 |
Inferred |
170.6 |
0.26 |
0.006 |
439 |
9 |
NOTE: The Mineral Resource is classified according to CIM (2014) definitions, estimated following CIM (2019) guidelines and has an effective date of March 31, 2021. The Independent Qualified Person for the estimate is Mr. Garth D. Kirkham, P.Geo., FGC., Of Kirckham Geosystems Ltd. The economic assumptions include the following: $3.50/lb Cu, $10.00/lb Mo, 84.6% average Cu recovery, 8.9% average Mo recovery, $1.74/tonne average mining costs, $1.13/tonne G&A costs, $0.88/tonne operational support costs, $4.67/ton milling costs, and pit slopes by rock type. The Mineral Resource is reported inclusive of the Mineral Reserve. The last date for drilling data and mining activities is March 31, 2021. Rounding may result in apparent summation differences between tonnes, grade and contained metal.