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Heritage Mining Ltd. (CSE: HML) has reached a key operational milestone by upgrading about 5.5 kilometres of access infrastructure at its Melba Project in Northeastern Ontario, enabling continuous year-round exploration for the first time. With seasonal access limitations eliminated, the company has resumed its diamond drilling program, completing hole ML3800-002 with assays pending, while drilling of ML3800-003 is ongoing. This infrastructure enhancement is expected to significantly improve Heritage’s capacity to systematically explore gold-bearing structures and mineralized zones identified through prior historical work.
Key Highlights
- Heritage Mining Ltd. (CSE: HML) has established the first-ever year-round access to the Melba Project, located roughly 22 kilometres northeast of Kirkland Lake and 90 kilometres southeast of Timmins in Northeastern Ontario.
- The company upgraded approximately 5.5 kilometres of a historic winter access trail to facilitate year-round diamond drilling and exploration equipment operations.
- Diamond drilling has recommenced with drill hole ML3800-002 completed and assays awaited, while ML3800-003 is currently in progress.
- Investors are likely anticipating assay results and further drilling updates as Heritage methodically tests gold-bearing quartz-vein and structural targets at the property.
Melba Project Infrastructure Upgrade Eliminates Seasonal Access Constraints
Heritage Mining’s establishment of year-round access marks a transformative enhancement in operational capability at the Melba Project. Previously, exploration was limited to short winter windows when seasonal conditions allowed equipment and crew access. Upgrading roughly 5.5 kilometres of the former winter trail for year-round use removes this historical bottleneck, enabling continuous, systematic exploration activities throughout the year.
This infrastructure improvement directly addresses a longstanding limitation that restricted Heritage’s ability to advance the understanding of the project’s gold potential. Although significant gold-bearing quartz-vein and structural targets were identified in historical exploration, seasonal access restrictions hindered consistent follow-up. With permanent, all-weather access now established, Heritage can conduct drilling, geological mapping, geophysical surveys, and related exploration work year-round without seasonal interruptions.
Ongoing Diamond Drilling Program and Anticipated Assay Results
Following the completion of access upgrades, Heritage has restarted active diamond drilling at Melba. Drill hole ML3800-002 is complete with assays pending, offering the prospect of near-term analytical results. Concurrently, drill hole ML3800-003 is underway, demonstrating the company’s sustained momentum in systematically evaluating the property’s mineral potential.
The drilling strategy aims to deepen understanding of the controls, continuity, and scale of gold mineralization at Melba through recovery and analysis of oriented core and structural studies. This approach provides the geological framework necessary to determine whether historical gold occurrences represent isolated mineralization or part of a larger mineralized system with economic potential. Oriented core enables geologists to assess the geometric orientation and spatial relationships of mineralized structures, critical for evaluating exploration targets.
Geological Context and Proximity to Established Gold Mines
The Melba Project spans approximately 3,886 hectares and is strategically positioned along the Ross Fault, a splay off the Porcupine-Destor Fault Zone. This location situates the property within a mineralized corridor associated with both development-stage and historic gold-producing operations. The McEwen Mine (Grey Fox Mine), located about 22 kilometres from Melba, has historically produced over one million ounces of gold. Similarly, the Ross Mine, approximately 16 kilometres away, also produced more than one million ounces of gold.
The proximity to these established gold-producing mines indicates that Melba lies within a geologically favorable region with proven mineralization. The Ross Fault segment hosting Melba has demonstrated economically significant gold occurrences, supporting Heritage’s exploration thesis and justifying continued systematic drilling and exploration to assess whether Melba contains economic gold mineralization comparable to nearby operations.
Quality Assurance and Technical Procedures
Heritage Mining follows rigorous quality assurance and quality control protocols throughout its exploration program, from drill core recovery to final laboratory analysis. Drill core is recovered as NQ-diameter core, boxed, labelled, and sealed at the drill rig site, with wooden depth blocks inserted after each run to maintain precise depth tracking.
Core is transported by contractors to an onsite logging facility where Heritage personnel manage further core handling. The core is halved using a diamond saw under a qualified geologist’s supervision, with sampling intervals typically one metre but adjusted to a minimum of 0.5 metres to respect lithological and mineralogical contacts and isolate narrow veins or structures with potential elevated grades. One half of each core section is retained as a witness sample, while the other is submitted for analysis, ensuring an auditable sample record.
Laboratory Analysis Using PhotonAssay Technology
Heritage submits drill core samples for gold analysis via the PhotonAssay method through Paragon Geochemical, an ISO/IEC 17025:2017 accredited laboratory in Timmins, Ontario. PhotonAssay is a non-destructive technique utilizing high-energy X-rays, detecting gold concentrations from 0.015 ppm to 350 ppm. Samples undergo standardized preparation including barcode logging, weighing, drying at 100°C, crushing to 70% passing 2 mm mesh, and riffle splitting to produce approximately 500 grams for PhotonAssay and 250 grams for pulverization to 85% passing 75 microns.
Following gold assay results, Heritage may perform multi-element assays on selected samples using inductively coupled plasma mass spectrometry after four-acid digestion, analyzing a 48-element suite. This sequential approach identifies elevated gold grades first, then selectively applies further elemental analysis, optimizing efficiency and cost.
Strict Quality Control and Corrective Actions
Heritage’s quality control program includes standards and blanks comprising at least 10% of all submitted samples, supplementing Paragon Geochemical’s internal QA programs. Quality control data are carefully reviewed upon receipt for any failures or out-of-tolerance results. Corrective actions are implemented if assay results for standards or blanks fall outside tolerance ranges, ensuring only data meeting stringent quality criteria are reported.
The company confirms all disclosed results have passed its quality control protocols, with no identified factors related to drilling, sampling, or recovery affecting assay accuracy or reliability. All assay data have been verified by Heritage’s qualified person against original certificates, maintaining an auditable chain of custody and verification.
Project Portfolio and Regional Exploration Focus
Heritage Mining is a Canadian mineral exploration company focused on advancing its Ontario project portfolio in both Northwestern and Northeastern Ontario. Besides the Melba Project, the company operates three properties near Sioux Lookout in the Eagle-Wabigoon-Manitou Greenstone Belt: Drayton-Black Lake, Contact Bay, and Scattergood projects. These properties benefit from extensive historic data, excellent access, and community logistical support.
This diversified portfolio offers multiple exploration avenues and potential discoveries, allowing efficient deployment of technical and financial resources across several prospects. Active operations across various Ontario properties position Heritage to evaluate multiple gold-bearing targets within established mineralized Canadian Shield regions, each with unique geological characteristics and exploration potential.
Qualified Person and Technical Oversight
The technical and scientific information in this announcement has been reviewed and approved by Stephen Hughes, P.Geo, Heritage’s Strategic Advisor and qualified person under National Instrument 43-101 – Standards of Disclosure for Mineral Projects. This designation ensures that technical disclosures are reviewed by professionals with appropriate credentials and experience.
Having a qualified person oversee technical disclosure provides investors assurance that reported information is independently reviewed and approved, supporting transparency and accuracy in mineral exploration reporting.
Project Status and Lack of Resource Estimates
Heritage Mining states that no economic evaluations have been completed for the Melba Project, which currently has no mineral resources or reserves defined under National Instrument 43-101. This standard disclosure indicates that while exploration has identified mineralization, the project remains at an early stage without formally estimated resources or reserves.
The absence of resource estimates reflects the early exploration phase. Current diamond drilling and systematic evaluation aim to enhance geological understanding and potentially define mineral resources in the future. Investors should note that exploration projects carry inherent risks and that mineralization identification does not guarantee economically extractable resources.
