Hemlo Mining refines porphyry model across 45,000-hectare package

Hemlo Mining Corp. Announces Refined Porphyry Model Supporting District-Scale Potential Across its 45,000-Hectare Land Package

PR Newswire

TORONTO , Sept. 22, 2026 /PRNewswire/ -- Hemlo Mining Corp. (TSX: HMMC) (OTCQX: HMMCF) ("Hemlo Mining" or the "Company") is pleased to announce a refined regional exploration strategy across its land package surrounding the Hemlo Gold Mine ("Hemlo" or the "Mine"). The refined exploration strategy follows a comprehensive re-examination of Hemlo by the Company's exploration team alongside internationally recognized economic geologists, including Dr. Richard Sillitoe and Dr. Ruben Padilla, as well as other independent experts with extensive experience in porphyry and orogenic gold systems. Recent work supports an evolving interpretation of Hemlo as an Archean porphyry-epithermal gold-molybdenum ("Au-Mo") system. As porphyry systems commonly occur in clusters, the Company is applying this model across its regional land package to identify and advance additional mineralized systems.

Highlights:

District-scale opportunity: evolving porphyry interpretation provides a new framework to reassess Hemlo's ~45,000-hectare land package for additional mineralized systems.

Hemlo's Moose Lake porphyry provides exploration blueprint for regional targets : the ~2,693 Ma alkaline porphyry, associated with the ~25 million ounce Hemlo gold deposit, extends for ~4 kilometre ("km") along strike and ~150 meters ("m") in width, with characteristic Au-Mo mineralization and strong potassic alteration.

Priority targets identified : Pic Property : located ~25 km northwest of the Mine; ~23,000-hectare area hosts two high-priority targets displaying key geological signatures observed at Hemlo: Beggs Area : a large, ~3.5 km × 1.5 km, ~2,690 Ma alkaline porphyritic intrusive centre, broadly coeval with Hemlo's Moose L