Mineral Resource
The Mineral Resource estimate, inclusive of the Mineral Reserves inventory reflect the March 2020 NI 43-101 Technical Report estimates, depleted to December 31, 2023.
Mineral Resource - as at December 31, 2023, and reported using a 0.13% TCu cut-off
Classification |
Tonnes (Mt) |
TCu (%) |
Total Measured |
425.9 |
0.46 |
Total Indicated | 328.4 |
0.38 |
Total Meas. plus Ind. |
754.3 |
0.43 |
Total Inferred |
62.2 |
0.36 |
The current depleted Mineral Resource as at December 31, 2023 was estimated and verified by David Gray of the Company who is a qualified person and
holds the following valid qualifications: BSc Hons(Geo), MAusIMM, FAIG,(#7323).
Mineral Resource Statement for Sentinel Stockpiles - as at December 31, 2023
Classification/Stockpile |
Tonnes (Mt) |
TCu (%) |
Total Measured |
- |
- |
Total Indicated |
43.0 |
0.22 |
Total Meas. plus Ind. |
43.0 |
0.22 |
The current stockpile Mineral Resource inventory as at December 31, 2023 was verified by David Gray of the Company who is a qualified person and holds
the following valid qualifications: BSc Hons(Geo), MAusIMM, FAIG,(#7323)
Mineral Reserves
The Mineral Reserve estimate for the Sentinel project as listed in the table below has been based on conventional Whittle 4X
optimization, followed by detailed life of mine design and planning accounting for staged pit cutbacks to suit in-pit ore crushing
and conveying plus trolley assisted waste haulage, and comprehensive ore and waste mining/production scheduling.
The statement is consistent with depletion from the estimate produced for the March 2020 NI 43-101 Technical Report. The
predicted plant recoveries are consistent with, test work and the operating results for the last two years. The estimated
marginal cut-off grade is based on the long-term consensus copper price of $3.00/lb Cu.
Mineral Reserve - as at December 31, 2023, and reported based on a long-term $3.00/lb Cu price
Classification |
Non-primary Sulphide Ore |
Primary Sulphide Ore |
Total Ore |
|
Ore (Mt) |
TCu (%) |
AsCu (%) |
Ore (Mt) |
TCu (%) |
AsCu (%) |
Ore (Mt) |
TCu (%) |
AsCu (%) |
Total Proven |
21.8 |
0.39 |
0.06 |
358.1 |
0.48 |
0.01 |
379.9 |
0.47 |
0.01 |
Total Probable |
20.3 |
0.31 |
0.05 |
208.0 |
0.42 |
0.01 |
228.3 |
0.41 |
0.02 |
Total Mineral Reserves |
42.1 |
0.35 |
0.06 |
566.1 |
0.46 |
0.01 |
608.2 |
0.45 |
0.01 |
The current depleted in-pit Mineral Reserve as at December 31, 2023 for Sentinel has been estimated and verified by the Company’s personnel under the
supervision of Michael Lawlor of the Company, who is a qualified person and holds the following valid qualifications: BEng (Mining)(Hons), MEngSc,
FAusIMM.
Mineral Reserve Statement for Sentinel Stockpiles - as at December 31, 2023
Classification |
Non-primary Sulphide Ore |
Primary Sulphide Ore |
Total Ore |
|
Ore (Mt) |
TCu (%) |
AsCu (%) |
Ore (Mt) |
TCu (%) |
AsCu (%) |
Ore (Mt) |
TCu (%) |
AsCu (%) |
Total Proven |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Total Probable |
- |
- |
- |
43.0 |
0.22 |
- |
43.0 |
0.22 |
- |
Total Mineral Reserves |
- |
- |
- |
43.0 |
0.22 |
- |
43.0 |
0.22 |
- |
The current stockpile Mineral Reserve inventory as at December 31, 2023 for Sentinel has been verified by the Company’s personnel under the supervision
of Michael Lawlor of the Company, who is a qualified person and holds the following valid qualifications: BEng (Mining)(Hons), MEngSc, FAusIMM.
At planned throughput rates the remaining life of mine is approximately 11 years.