AMEX Gold Mining discovers Rosé Zone beneath Perron ramp as underground development begins

AMEX Gold Mining Inc. (TSXV: AMX; OTCQX: AMXEF) has discovered a new gold structure called the Rosé Zone at its wholly owned Perron Gold Project in northwestern Quebec, placing another exploration target unusually close to underground infrastructure that is already under construction. The new mineralised zone begins approximately 165 metres beneath the ramp being developed for AMEX Gold Mining Inc.’s 40,000-tonne bulk-sample program and potential future mine, making location almost as important as the initial gold grades.

Initial Rosé Zone drilling returned 8.02 grams per tonne gold over 4.30 metres, including 23.93 grams per tonne over 1.15 metres, while another hole returned 11.78 grams per tonne over 1.80 metres including 30.86 grams per tonne over 0.65 metres. A third reported interval contained 10.94 grams per tonne over 1.20 metres, and AMEX Gold Mining Inc. says visible gold was observed in a deeper hole at approximately 410 metres. The company has so far traced the emerging zone over roughly 275 metres vertically and 70 metres along strike, while emphasising that drilling remains limited and no economic assumptions can yet be made from the discovery.

AMEX Gold Mining Inc. shares closed at C$4.58 on September 10, up only 0.44% on the day of the announcement, before easing to approximately C$4.54 on September 11. That relatively modest market reaction is sensible given that Rosé is an early-stage discovery rather than a resource or reserve, although the stock remains well above levels around C$4.17 seen at the start of September.

Why does the Rosé Zone’s position beneath the Perron ramp matter for future mine economics?

Exploration discoveries normally create value only after companies spend additional capital defining them and then establish a practical way to access the mineralisation. Rosé potentially changes that equation because AMEX Gold Mining Inc. is already advancing underground access nearby. The company argues that extensions of the zone may eventually be drilled from underground and that relatively limited incremental development could be required if Rosé ultimately becomes part of a future mine plan.

That does not mean the new zone will automatically become economic ore. AMEX Gold Mining Inc. still needs enough drilling to establish geometry, continuity, true widths and resource classification, followed by updated mine planning and economic assessment. However, resource ounces positioned beside infrastructure that must be built anyway can theoretically carry greater incremental value than equivalent ounces located kilometres from planned workings.

The underground ramp itself is no longer conceptual. AMEX Gold Mining Inc. completed portal construction and initiated underground development in early September, with CMAC-Thyssen Mining Group advancing the ramp toward a planned vertical depth of approximately 235 metres. The development is designed initially to access the high-grade Champagne Zone and support a 40,000-tonne bulk sample, but AMEX Gold Mining Inc. expects components of the infrastructure could eventually form part of a commercial mine, subject to permitting and development decisions.

That is why Rosé arrives at an interesting point in Perron’s evolution. Exploration is still adding geological optionality while the project simultaneously moves underground, creating a chance for resource growth and mine development to begin reinforcing each other.

How large and high grade is the existing Perron Gold Project before the Rosé discovery?

AMEX Gold Mining Inc.’s May 2025 resource estimate contains approximately 1.615 million ounces of measured and indicated gold resources grading 6.14 grams per tonne across 8.183 million tonnes. Another approximately 698,000 ounces are classified as inferred at an average grade of 4.31 grams per tonne. The Champagne Zone contributes the highest-grade component, containing around 831,000 measured and indicated ounces grading 16.20 grams per tonne and approximately 128,000 inferred ounces grading 9.83 grams per tonne.

Those grades explain why AMEX Gold Mining Inc. has pursued an underground development strategy rather than a large bulk-tonnage open pit. The company’s current plan centres on selectively extracting higher-value underground material and using existing regional processing infrastructure rather than immediately constructing a completely new standalone mill.

A feasibility study referenced in AMEX Gold Mining Inc.’s August project-notice filing contemplated initial capital of approximately C$193.9 million and average annual production of about 147,000 ounces. The company reported estimated all-in sustaining costs of US$910 per ounce, an after-tax net present value of C$1.127 billion and an after-tax internal rate of return of 114.6% under the study assumptions. Those numbers remain estimates rather than guaranteed outcomes and depend on gold prices, grades, recoveries, capital execution and access to suitable processing capacity.

The same feasibility framework makes exploration near existing infrastructure particularly valuable. If future drilling can add mineable tonnes without requiring a proportionate increase in access development or surface infrastructure, those ounces could potentially extend mine life or support a better production profile.

What is AMEX Gold Mining trying to learn from the 40,000-tonne Perron bulk sample?

The bulk sample is intended to bridge the gap between drill-core modelling and actual underground mining. AMEX Gold Mining Inc. plans to collect geological, geotechnical, metallurgical and operating information while testing assumptions used in its development studies under real mining conditions. Such work can improve estimates for dilution, mining productivity, ground behaviour, ore sorting, recovery and costs before larger amounts of capital are committed.

Infrastructure required for the program includes underground access, site services, electrical distribution, water management and supporting surface facilities. Construction progressed through the summer, with water-treatment equipment delivered and portal work subsequently completed before the first underground development round was blasted.

AMEX Gold Mining Inc. has simultaneously continued an aggressive exploration program across Perron and Perron West. The Rosé announcement noted thousands of Quebec and Ontario samples still awaiting laboratory results, while drilling elsewhere at Perron continues to produce high-grade intersections in zones such as N110, Gratien, Grey Cat and the Central Polymetallic Zone.

This creates an unusual development dynamic. AMEX Gold Mining Inc. is not advancing a static resource toward construction; it is advancing underground infrastructure while the geological inventory continues to evolve around it.

What should investors watch next at AMEX Gold Mining Inc. and the Perron Gold Project?

The immediate exploration question is whether Rosé can be expanded materially along strike and at depth. A few high-grade holes can establish discovery potential, but a mineable zone requires demonstrated continuity and sufficient tonnes. Future drilling should therefore matter more than the excitement generated by visible gold or isolated high-grade intervals.

The permitting pathway is equally important. AMEX Gold Mining Inc. filed a project notice for the proposed Perron Gold Mine in August, beginning the formal environmental assessment process in Quebec. Environmental baseline studies, engineering and engagement with communities and the Abitibiwinni First Nation will be increasingly important as the project moves from bulk-sample activity toward any commercial mine decision.

From an investor perspective, Rosé is compelling because it potentially adds exploration upside beside infrastructure that is already being funded and developed. Yet the market appears to be treating the discovery with appropriate restraint. The next re-rating would be more defensible if AMEX Gold Mining Inc. can demonstrate substantial continuity, incorporate new ounces into an updated resource and show that those ounces improve an already advanced underground development case.