Announcement • Jun 26
Troilus Mining Corp. Reports Results from Z87 Optimization Drill Program At Troilus Project
Troilus Mining Corp. announced the first batch of results from the Z87 optimization drill program, as part of its ongoing 2026 Exploration activities at its Troilus Project located in north-central Quebec, Canada. The results reported include 13 drill holes totalling 3,718 metres, following the exploration program outlined in the Company’s March 31, 2026 press release. The ongoing Z87 optimization program is designed to support future mine planning by targeting inferred mineralization and previously unsampled intervals from historic drilling within the hangingwall of the main ore zone. All results reported are located within the Z87 reserve pit, as defined in the Feasibility Study, and support the Company’s objective of evaluating opportunities to improve future mine planning, including potential resource conversion, pit sequencing optimization, strip ratio improvements and early-year mill feed flexibility. Hole 87-26-505 intersected 0.95 g/t gold equivalent (“AuEq”) (0.82 g/t Au, 0.88 g/t Ag, 0.08 % Cu) over 157.7 m, including 1.37 g/t AuEq (1.28 g/t Au, 0.99 g/t Ag, 0.04 % Cu) over 28 m, also including 1.68 g/t AuEq (1.47 g/t Au, 0.91 g/t Ag, 0.12 % Cu) over 30.9 m, and also including 1.16 g/t AuEq (0.87 g/t Au, 1.54 g/t Ag, 0.17 % Cu) over 19 m starting at 238 m downhole. Hole 87-26-508 intersected 1.10 g/t gold equivalent (“AuEq”) (0.90 g/t Au, 2.06 g/t Ag, 0.11 % Cu) over 96 m, including 2.59 g/t AuEq (2.28 g/t Au, 2.48 g/t Ag, 0.18 % Cu) over 13.7 m, also including 1.88 g/t AuEq (1.60 g/t Au, 3.10 g/t Ag, 0.15 % Cu) over 16.5 m starting at 284 m downhole. Hole 87-26-481 intersected 0.55 g/t gold equivalent (“AuEq”) (0.49 g/t Au, 0.34 g/t Ag, 0.03 % Cu) over 83 m, including 1.10 g/t AuEq (1.02 g/t Au, 0.43 g/t Ag, 0.05 % Cu) over 20 m starting at 298 m downhole. Z87 was one of two zones previously mined by open pit at the Troilus Project. Many of the historic drill holes that defined the previously mined reserve were not fully sampled, with several hundred metres of core left unsampled in many holes. For resource estimation purposes, these unsampled intervals are assigned a value equal to half the laboratory analysis detection limit, resulting in large gaps within the block model. The current Z87 optimization drill program was designed to target these gaps and convert waste to potential future ore. There also exist opportunities to upgrade the classification of inferred material to the indicated category, which could allow for potential incorporation into future mine plan updates. All grades are uncut, and true thicknesses are approximately 75% to 90% of drilled length. Drillhole 87-26-505 was designed to target an area of inferred material within the Z87 reserve pit and test for additional mineralization in the hangingwall of the main zone. In the Hangingwall, the hole returned 0.99 g/t AuEq over 17 metres from an area of the resource model that does not currently contain mineralized material, highlighting the potential to help improved strip ratios within the Phase 1 Z87 reserve pit - an area of significant mining activity during the critical early years of production. The hole also returned a broad main-zone intercept of 157.5 metres grading 0.95 g/t AuEq. This interval contained higher-grade sections grading 1.37 g/t AuEq over 28 metres, 1.68 g/t AuEq over 30.9 metres and 1.16 g/t AuEq over 19 metres. By targeting inferred material within the reserve pit, the program is evaluating opportunities to upgrade mineralization to the indicated category for potential incorporation into future reserve and mine plan updates. Drillhole 87-26-508 was planned with the same objective, targeting inferred material within the Z87 reserve pit and testing for additional hangingwall mineralization. The hangingwall returned an intercept of 0.43 g/t AuEq over 42 metres from an area of the block model that is not currently mineralized. The hole also returned 1.10 g/t AuEq over 96 metres from the main zone of Z87, which includes 2.59 g/t AuEq over 13.7 metres and 1.88 g/t AuEq over 16.5 metres. Drillhole 87-26-481 successfully targeted inferred material directly under the previously mined pit. The hole returned 83 metres grading 0.55 g/t AuEq, including 1.10 g/t AuEq over 20 metres from the primary target, while the hangingwall returned 5.94 g/t AuEq over 1 metre and 1.78 g/t AuEq over 1 metres from areas of sparse mineralization in the current block model. The holes included in this news release account for approximately 15% of the total metres expected to be drilled in and around the Z87 reserve pit as part of the ongoing optimization program.
