In 2024, Troilus reported the results on an initial Mineral Reserves Estimate (“MRE”) for the gold-copper Troilus Project, located in northcentral Quebec, Canada.
Probable Mineral Reserve estimate totaling 380 million tonnes, grading 0.59g/t AuEq (0.49 g/t Au, 0.058 % Cu and 1.0 g/t Ag) and containing 7.26 million ounces of gold equivalent (6.02 Moz Au, 484 Mlb Cu and 12.15 Moz Ag), reflecting the successful conversion of Indicated and Inferred Mineral Resources.
Probable Mineral Reserves By Zone
2023 Resource Pits & 2024 Reserve Pits
Note Related to the Mineral Reserve Estimate:
This mineral reserve estimate has an effective date of January 15, 2024, and is based on the mineral resource estimate dated October 2, 2023, for Troilus Gold by AGP Mining Consultants Inc. The Mineral Reserve estimate was completed under the supervision of Willie Hamilton, P.Eng. of AGP, who is a Qualified Person as defined under NI 43-101. Mineral Reserves are stated within the final pit designs based on a US$1,550/oz gold price, US$20.00/oz silver price and US$3.50/lb copper price. An NSR cut-off of C$9.96/t was used to define reserves. The life-of-mine mining cost averaged C$3.99/t mined, preliminary processing costs were C$8.02/t ore and G&A was C$1.94/t ore placed. The metallurgical recoveries were varied according to gold head grade and concentrate grades. 87 pit recoveries for equivalent grades were 95.5%, 94.7% and 98.2% for gold, copper, and silver respectively. J pit recoveries for equivalent grades were 93.1%, 89.3% and 88.9% for gold, copper, and silver respectively. X22 pit recoveries for equivalent grades were 95.5%, 94.7% and 98.2% for gold, copper, and silver respectively. SW pit recoveries for equivalent grades were 85.7%, 91.5% and 85.6% for gold, copper, and silver respectively. The formulas used to calculate equivalent values are as follows, for 87 Pit AuEq = Au + 1.5361*Cu +0.0133 *Ag, for J Pit AuEq = Au + 1.4849*Cu +0.0123 *Ag, for SW Pit AuEq = Au + 1.6535*Cu +0.0129 *Ag, for X22 Pit AuEq = Au + 1.5361*Cu +0.0133 *Ag. Please refer to the identified risks in the Company’s Annual Information Form available under the Company’s profile at www.sedarplus.ca for known legal, political, environmental, and other risks that could materially affect the potential development of the mineral resources and mineral reserves.
On October 16, 2023, Troilus reported the results of an updated Mineral Resource Estimate (“MRE”) for its gold-copper Troilus Project, located in northcentral Quebec, Canada. Read the press release HERE
Highlights of the 2023 MRE include:
2023 Mineral Resource Estimate Technical Presentation
Total Indicated and Inferred Mineral Resources, All Zones (Open Pit + Underground)
2023 MRE Wireframes and Pitshells + Resource Distribution by Zone
This updated mineral resource estimate, in accordance with the National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101") and CIM Definition Standards for Mineral Resources and Mineral Reserves, and reflects the results of 505 drill holes (216,502 metres of drilling) completed since the mineral resource estimate announced in July 2020. Approximately half of the drilling efforts were focused on the expansion and definition of the Southwest and X22 zones, the two most recently discovered ore bodies, which are both drilled to an Indicated level of confidence and will be included in the Feasibility Study’s mining scenario.
The mineral resource estimates for Z87, J Zone and the Southwest Zone contain both open pit and underground resources, while Zone X22 contains solely open pit mineral resources.
Total Indicated Mineral Resources, by Zone
Total Inferred Mineral Resources, by Zone
Open Pit Growth by Zone in the Indicated Category, 2016-2023
The following sensitivity table shows the potential for higher-grade mineral resources at higher gold equivalent cut-offs.
Open-Pit MRE Sensitivity Table
The following figure depicts a linear relationship between ore tonnes and grade at variable cutoff grades, outlining a robust resource that has low sensitivity to changing cut-off grades caused by changing market or economic conditions.
2020 vs. 2023 Mineral Resource Estimate Cross Sections
Notes Related to the Mineral Resource Estimate