Osisko Metals Incorporated (TSX: OM | OTCQX: OMZNF | FSE: 0B51) has announced the launch of its 2026 Deep Porphyry Exploration Project (DPEX) at the Gaspé Copper Project in Québec, with new results confirming the potential for a large, high‑grade system at the Porphyry Mountain deposit. The DPEX initiative will include deep drilling, re‑analysis of historical core, and a full remodel of legacy data, with the aim of delivering a maiden NI 43‑101 Inferred Mineral Resource Estimate by year‑end 2026.
The company reported initial findings from re‑assayed historical core from drill hole DDH 30‑0943, originally drilled in 2011 by Xstrata. The hole returned 852m averaging 0.70% copper, 2.92g/t silver, and 0.062% molybdenum (0.95% CuEq) from 998m to 1,850m downhole. Osisko Metals noted that several historic holes into the lower portion of the system ended in mineralisation, indicating that Porphyry Mountain remains open at depth.
Located roughly 1.1km northeast of the Copper Mountain pit, Porphyry Mountain sits beneath the current GCP resource footprint and will be evaluated independently from ongoing near‑surface resource and expansion drilling at Needle Mountain and Needle East.
Robert Wares, CEO of Osisko Metals, commented, “These very promising results launch our 2026 DPEX resource evaluation programme at Porphyry Mountain. Following the anticipated Q1 2026 release of our MRE update on the GCP Copper Mountain deposit, and in addition to the currently planned 2026 expansion drilling on the GCP Needle Mountain and Needle East zones, the DPEX resource evaluation programme on Porphyry Mountain will include deep drilling on the deposit and thorough re‑assaying of available historical drill core. This should establish its true depth and reveal the full potential of the deposit, with the objective of releasing a maiden Inferred MRE on Porphyry Mountain by the end of 2026.”
Osisko Metals added that the depth potential of Porphyry Mountain could offer long‑term development options, with the updated Copper Mountain pit expected to reach significant depths later in its mine life, potentially enabling ramp access to deeper, higher‑grade zones.
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