Heritage Mining Restarts Drilling at Melba Mine

VANCOUVER, BC — March 6, 2026 — Leads & Copy —

Heritage Mining Ltd. (CSE: HML FRA: Y66) has announced the restart of its Melba drill program, targeting the deepest historical intercept of the High-Grade Historical Melba Mine.

Historical drilling at the Melba Mine has returned results of up to ~14.24g/t Au over ~4.11m from ~85m from the surface, according to the company. The Melba project, comprised of ~3,886 hectares, is located ~22km northeast of Kirkland Lake and 90km southeast of Timmins in Northeastern Ontario, Canada.

The Melba Mine lies along the Ross Fault, a splay off of the Porcupine-Destor Fault Zone, which is associated with development-stage and historic producing gold mines. These include McEwen Mining’s Grey Fox Mine (+1Moz Au) ~22km away, and the Ross Mine (+1Moz Au) ~16km away.

Peter Schloo, President, CEO, and Director of Heritage Mining, commented that the historically intersected zone showed favorable results with increased grade at depths, similar to other deposits in the area. He added that the company looks forward to expanding its understanding of the mineralized zones at Melba and providing stakeholders with updates on additional exploration results.

The Melba Mine is located in Northeastern Ontario, southeast of Matheson, approximately seven kilometers west off King’s Highway 11, on the section of highway traveling from Kirkland Lake to Cochrane. The mine is situated on the northeastern part of Ontario, near the Ontario/Quebec border. The claim package includes single-cell mining claims spanning ~3,886 hectares and one mining lease.

Heritage Mining adheres to a strict QA/QC protocol for handling, sampling, sample transportation, and analyses. Chain-of-custody protocols are designed to ensure the security of samples until they are delivered to the laboratory.

Drill core is boxed, covered, and sealed at the drill rig site, labeled with the official drillhole name, and identified in numerical sequence. Wooden blocks with corresponding downhole meterage are inserted after every drill run. Drill core boxes are transported by drilling contractors to the onsite logging facility where company personnel take over core handling.

All drilling at the Melba project recovers NQ core. Drill core is systematically cut in half using a diamond saw. A qualified geologist examines the drill core, marking intervals for sampling and indicating the cutting line. Sample lengths are typically 1.0 meter, adjusted to a minimum length of 0.5 meter as necessary to respect lithological and/or mineralogical contacts and to isolate narrow veins or structures that may contain higher-grade mineralization.

Technicians saw the core along the cutting lines determined by the geologist. One half of the core is retained as a witness sample, while the other half is submitted for analysis. Individual sample bags are securely sealed and placed into sealed rice bags, which are then clearly marked with their contents. Heritage Mining submits samples for gold determination by PhotonAssay to Paragon Geochemical - Timmins.

Paragon operates under a commercial contract with Heritage Mining. Drill core samples are shipped to Paragon for sample preparation at their facilities in Timmins, Ontario. Paragon is an ISO/IEC 17025:2017 accredited laboratory for the PhotonAssay method in addition to a variety of diverse metal determination methods. The Paragon procedure for PhotonAssay involves lab applying preparation codes INV-SAM (sample logging via barcode), PREP-PKG (weigh, dry at 100C, crushing to 70% passing 2mm, riffle split ~500g into a PA jar and 250g for pulverization to 85% passing 75 micron) followed by analytical code Au-PA01 which is a non-destructive gold analysis method using high-energy X-rays with a gold detection range from 0.015 ppm to 350ppm.

After gold assays are returned, Heritage may choose to perform multi-element assays on selected samples based on the gold results first with Paragon. In these cases, an aliquot is taken from the previously prepared 250g split for analysis by 48MA-MS (4 acid digestion followed by multi-element ICP-MS analysis for a 48 element suite).

Mitch Lavery P. Geo, Strategic Advisor for the Company, serves as a qualified person as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects and has reviewed the scientific and technical information in this news release, approving the disclosure herein.

Heritage Mining Ltd. is a Canadian mineral exploration company advancing its Ontario Project Portfolio in Northwestern and Northeastern Ontario. The Drayton-Black Lake, Contact Bay, and Scattergood projects are located near Sioux Lookout in the underexplored Eagle-Wabigoon-Manitou Greenstone Belt. The Melba Property is located near Ramore, Ontario.

Source: Heritage Mining Ltd.