Heritage Mining Confirms Multiple Gold Mineralized Veins at Melba Project

TORONTO, ON, June 17, 2026 — Leads & Copy — Heritage Mining Ltd. (CSE: HML FRA: Y66) has confirmed the presence of multiple gold mineralized veins at its Melba Project. Drill hole ML3800-001, with assays now complete, intersected several veins, including the Blue Vein which returned 2.44g/t Au over 2.50m from 35.5m. Other intersections from ML3800-001 include the Mike Vein (3.44g/t Au over 1m), Rolling Vein (0.20g/t Au over 2.5m), Contact Vein (0.10g/t Au over 1m), and New Vein (0.12g/t Au over 1m).

Drill hole HML3800-002 is currently undergoing assay analysis. The Melba Project is situated approximately 22km northeast of Kirkland Lake and 90km southeast of Timmins in Northeastern Ontario, Canada, and spans approximately 3,886 hectares.

Heritage Mining is currently logging core from drill hole M3800-002 and collecting oriented drill core structural measurements to ascertain the trend and dip of the various vein sets. This data will be integrated into the project's geological model.

“We continue to intersect new gold bearing veins at Melba and we are excited to see the system growing in scale. Some of these quartz vein structures were not previously drilled by historic explorers, because some of the veins do not outcrop at surface. We interpret that the broader vein and veinlet zones could potentially converge along strike or at depth and this is what we are targeting at Melba going forward,” stated Peter Schloo, President, CEO and Director of Heritage.

The gold mineralization is found within a sheared Rhyolitic Tuff/Fragmental lithology. This mineralization is structurally controlled and characterized by multi-generational veins exhibiting breccia, shear, and extension-related features, indicative of multiple fluid ingress events, a common characteristic of large orogenic-style gold deposits globally. Diamond drill intersections suggest a braided system of shear-hosted veins interspersed with altered wall-rocks in the damage zones. The variable orientations of these structures will be further assessed through oriented core drilling.

The Melba project is strategically located along the Ross Fault, a splay off the Porcupine-Destor Fault Zone, an area associated with significant gold mines, including the McEwen Mine (Grey Fox Mine) and the Ross Mine, both of which have produced over one million ounces of gold.

Heritage Mining follows a stringent Quality Assurance/Quality Control (QA/QC) protocol for sample handling, preparation, and analysis. Samples are securely sealed and transported to Paragon Geochemical in Timmins, Ontario, an ISO/IEC 17025:2017 accredited laboratory. Gold assays are determined using PhotonAssay, a non-destructive method with a detection range from 0.015 ppm to 350 ppm. Multi-element assays may be performed on selected samples. Rigorous QA/QC procedures, including the use of standards and blanks, are in place to ensure the accuracy and reliability of the assay data. Stephen Hughes, P.Geo., Strategic Advisor for the Company, has reviewed and approved the scientific and technical information presented in this news release in accordance with National Instrument 43-101.

Heritage Mining Ltd. is a Canadian mineral exploration company focused on advancing its Ontario Project Portfolio in Northwestern and Northeastern Ontario. The company's projects include Drayton-Black Lake, Contact Bay, Scattergood, and the Melba Property.

Source: Heritage Mining Ltd.