お知らせ • Jul 01
Talamore Mining Corporation Updates Mineral Resource Estimate for the Cristina Project in Chihuahua, Mexico
Talamore Mining Corporation reported the results of a mineral resource estimate update at its wholly-owned Cristina polymetallic vein project in southwestern Chihuahua State, Mexico. The Project lies within the prolific Sierra Madre gold-silver belt in the state of Chihuahua, Mexico. It consists of multiple outcropping quartz veins, stockwork veins, and breccias that are frequently greater than 10 metres in width and extend for a currently known strike length of up to 5 km. At least four parallel mineralized vein systems have been mapped to date; however, most of the resource estimate reported in this release is contained within the Guadalupe vein, which has been the primary focus of drilling completed on the Project. These results reflect drilling up to April 1, 2025. The MRE was prepared under the supervision of John Sims CPG (an Independent Qualified Person), President of Sims Resources LLC. Indicated resources of 17.5 Mt at 0.58 g/t gold, 33.29 g/t silver, 0.50% zinc, 0.18% lead and 0.04% copper (1.41 g/t gold-equivalent grade), for a contained 795,000 AuEq ounces. Inferred resources of 33.0 Mt at 0.50 g/t gold, 23.76 g/t silver, 0.50% zinc, 0.18% lead and 0.05% copper (1.17 g/t AuEq grade), for a contained 1,243,000 AuEq ounces. The bulk of the resource comes from the Guadalupe vein system, which is just one of the four major vein systems on the property that have been tested by drilling to date. All of the vein systems remain open at depth and along strike, with strong potential for continued resource growth. In addition to the resource update cited above which focused on maximizing the open pit resources, a sensitivity analysis looked at two alternative scenarios, the first prioritizing underground resources with smaller open pits, and the second considering only underground resources. These indicate excellent potential for alternative development scenarios for the Project. The Mineral Resource Estimate update for the Cristina deposit was completed under the supervision of John Sims, a member of the American Institute of Professional Geologists, and an Independent Qualified Person as defined by NI 43-101 guidelines. MRE block models were constructed and classified using a drilling cut-off date of April 1, 2025 and are based on approximately 84,106 metres of diamond drilling in 273 drill holes, including 13,919 metres drilled by Fuerte (now Talamore) since the January 2023 MRE. Open pit estimation was completed using the Hochbaum Pseudoflow algorithm in Datamine's Studio NPVS on a single 5 x 5 x 5 m selective mining unit block model covering the entire project area. The underground estimate was generated using the Mineable Stope Optimizer algorithm on two 2.5 x 2.5 x 2.5 m block models - one constructed for the northern project area (La Cenicera, El Carmen, San Francisco, and Los Ingleses), and the other constructed for the southern project area (Guadalupe and Mexico Libre). The selected interpolation methodology for gold, silver, copper, lead, and zinc in all block models was Inverse Distance Cubed. The effects of potentially anomalous high-grade sample data are controlled using traditional top-cutting. Indicated resources were classified based on a drill data spacing of 40 m or less for the open pit model and 35 m or less for the underground models; Inferred resources were classified based on a drill data spacing of 80 m or less for the open pit model and 70 m or less for the underground models. Model validation checks for the final reported ID3 estimates include statistical validation using Ordinary Kriging and Nearest Neighbor estimates, Swath plot comparisons between composite data and the three estimation methods, and visual validation on cross sections and plan levels. The MRE is based on metal prices of USD 2,400/oz Au, USD 40.00/oz Ag, USD 1.30/lb Zn, USD 1.00/lb Pb and USD 4.50/lb Cu. Open pit Resources were tabulated considering blocks above a USD 13.25/t Net of Smelter Return cutoff contained within an economically constrained pit shell, while underground Resources were tabulated considering stopes above a USD 63.00/t NSR cutoff, unless otherwise stated in the inventory sensitivities outlined in this release. Appropriate estimates for metal recoveries and treatment and refining charges were applied when calculating the NSR values and are unchanged from those found in the 2023 Technical Report titled Technical Report on the Mineral Resource for the Cristina Project Located in Chihuahua, Mexico. Mining and processing inputs used to constrain the Mineral Resource estimates include process costs of USD 9.00/t processed, G&A of USD 2.00/t processed for the open pit model and USD 4.00/t for the underground models, open pit mining costs of USD 2.25/t of ore and USD 2.00/t of waste, a pit slope angle of 50 degrees, and underground mining costs of USD 50.00/t. A 1% royalty rate was also applied. Sensitivity Case 1: Underground Mining Only: Cristina is also amenable to a more substantial underground mining approach. In the following sensitivity table, Cristina is assumed to be mined by underground methods only, at an NSR cutoff grade of USD 113/t (USD 50/t above the breakeven NSR cutoff). Sensitivity Case 2: Underground Mining Prioritized: In addition to the reported MRE pit, computed at a revenue factor of 100%, a series of pit shells were computed at 5% revenue increments to determine whether opportunities exist to prioritize underground mining and select a smaller pit shell with higher grades and lower strip ratio than the RF100% pit. The sensitivity outlined in Table 3 illustrates a scenario in which the northern area is mined with the RF100% pit shell, but the southern area is mined using the RF65% pit shell. Stopes outside these pits and above an NSR cutoff grade of USD 113/t (USD 50/t above the breakeven NSR cutoff) would then be mined upon completion of open pit mining.
