Red Mountain Starts 17-Hole Drill Program at Armidale

Red Mountain Mining Ltd (ASX: RMX; OTC: RMXFF) has begun a maiden 17-hole reverse-circulation drilling program at the Oaky Creek prospect within its 391 km2 Armidale Antimony-Gold Project in New South Wales, with the campaign expected to run about three weeks and assays due early in the next quarter.

Red Mountain Mining Ltd (ASX: RMX; OTC: RMXFF) has put a drill rig on the ground for the first time at its Armidale Antimony-Gold Project in New South Wales, starting a 17-hole reverse-circulation campaign at the Oaky Creek prospect. The Perth-based critical minerals explorer said the program is expected to take roughly three weeks, with assay results expected early in the next quarter.

Reverse-circulation, or RC, drilling uses compressed air to bring rock chips back up the inside of the drill string rather than recovering an intact core. It is faster and cheaper than diamond coring, which makes it the standard first pass when a company wants to know whether the mineralisation mapped at surface actually continues at depth. Nothing about a maiden RC program is designed to define a resource; it is designed to tell management which targets deserve the more expensive follow-up.

What the surface work already showed at Oaky Creek

Oaky Creek is the most advanced target inside a 391 square kilometre landholding in the Southern New England Orogen, a belt regarded as Australia's premier antimony province. Red Mountain has previously reported conventional and auger soil sampling plus rock chip results grading up to 39.3% antimony and 1.09 parts per million gold from the prospect.

Those numbers need reading with care. Rock chips are hand-selected samples of exposed vein material, so a 39.3% antimony chip is a statement about the best rock a geologist could find at surface, not about an average grade over any mineable width. What such a result does establish is that a high-tenor antimony system exists in outcrop, and the accompanying gold value points to the classic orogenic antimony-gold vein association — stibnite-bearing quartz veins emplaced along structures in deformed sedimentary rocks, with gold carried in the same plumbing. The company has framed the surface dataset as evidence of a potentially large-scale vein system with meaningful strike extent, and the 17 holes are placed against the geochemical anomalies that work generated.

The announcement was issued from Perth via ABN Newswire and reported by INN Precious Metals.

Why antimony is the metal getting the attention

Antimony spent decades as an unglamorous industrial input — flame retardants, lead-acid battery alloys, glass clarifying agents, ammunition primers. It has been pulled onto critical minerals lists in Washington, Canberra and Brussels for the same reason as graphite and rare earths: production and, more importantly, processing capacity are concentrated in a small number of jurisdictions, and Western consumers have very little domestic supply to fall back on. Defence applications sharpen the point, because antimony trisulphide has uses in munitions that have no easy substitute.

That is the backdrop for a junior explorer drilling antimony targets in a stable jurisdiction with existing mining infrastructure and a skilled workforce. Red Mountain describes itself as a critical minerals exploration and development company holding ground in what it calls Tier-1 mining districts in both the United States and Australia, so Armidale sits within a wider portfolio rather than being the company's sole asset. Investors in this corner of the market are underwriting optionality on supply-chain policy as much as on geology.

The shares are pricing pure exploration risk

Red Mountain's US over-the-counter line, RMXFF, last traded at 0.01 as of the close on Fri, 28 Aug 2026 20:00 GMT, down 25.68% on the day from a prior close of 0.01, with the day's range also spanning 0.01. At that price level the arithmetic of a percentage move is close to meaningless: a single tick on a sub-penny quote produces a double-digit percentage swing, and the OTC line is a thinly traded shadow of the primary ASX listing where price discovery actually happens. Readers should treat the OTC quote as an indicative reference, not as the market's verdict on the drill program.

The wider tape that day gave no cover to speculative names. The S&P 500 tracker closed at $769.35, off 0.23%, the Nasdaq 100 tracker at $716.43, down 0.65%, and the Dow tracker at $535.06, essentially flat at -0.03%. Index moves that small tell you nothing about a micro-cap explorer, which is the point: at this end of the market, the drill bit is the only catalyst that matters.

The calendar that decides the next move

Two dates now drive the story. The first is the end of drilling, roughly three weeks from commencement, which typically produces an interim update on downhole geology — the visual log of vein intercepts, alteration and stibnite presence — well before any numbers arrive. The second is the assay release early in the next quarter, when laboratory grades and intercept widths turn geological observation into something that can be modelled.

What would count as a good outcome is straightforward to define in advance:

• Vein intercepts in multiple holes rather than one, confirming the structure has continuity rather than being a surface pod.
• Grade-times-width figures substantial enough to matter, since a narrow high-grade vein and a broad moderate-grade zone imply very different mining approaches.
• Gold reporting alongside antimony, because a credible by-product credit changes project economics and widens the pool of interested investors.
• Consistency between the drilled grades and the geochemical anomalies that targeted them, which validates the sampling method across the rest of the 391 square kilometre package.

The risks are equally clear. Maiden programs miss frequently; anomalous soil geochemistry can reflect dispersed mineralisation with no coherent source at depth, and orogenic vein systems are structurally complex enough that a hole drilled at the wrong angle can pass close to good rock without cutting it. Assay laboratories across Australia have also faced turnaround pressure through the current critical minerals cycle, so timing slippage on results is a normal hazard rather than a warning sign in itself.

How to read the result when it lands

For a company at this market capitalisation, drill results function as a financing event. Strong intercepts widen the funding options for a follow-up program and put the company in front of a different class of investor, including strategic buyers with an interest in non-Chinese antimony units. Weak or ambiguous results push the next campaign back and force a harder conversation about capital.

Nothing in the current announcement changes the company's asset base or its balance sheet. What has changed is that Armidale has moved from a geochemical concept to a tested one, and the market will have laboratory numbers to judge it by within a matter of months. Until then, the useful discipline is to hold the surface results in proportion: 39.3% antimony in a rock chip is a reason to drill, and drilling is exactly what is now happening.

Key facts

• Ticker and last price: RMXFF last traded at 0.01, -25.68%, as of Fri, 28 Aug 2026 20:00 GMT close (primary listing ASX: RMX)
• Drilling scope: 17 reverse-circulation holes at the Oaky Creek prospect, approximately three weeks of drilling
• Project size: 391 km2 Armidale Antimony-Gold Project, Southern New England Orogen, New South Wales
• Best surface results to date: Up to 39.3% antimony and 1.09 ppm gold from soil sampling and rock chips at Oaky Creek

Frequently asked questions

What has Red Mountain Mining actually started?

Red Mountain Mining has commenced its maiden reverse-circulation drilling program at the Oaky Creek prospect within the Armidale Antimony-Gold Project in New South Wales. Seventeen holes are planned to test priority targets generated by the company's surface geochemical sampling. Drilling is expected to take about three weeks, with assay results expected early in the next quarter.

What does reverse-circulation drilling mean?

Reverse-circulation, or RC, drilling uses compressed air to lift crushed rock chips up the inside of the drill string to the surface for sampling. It is quicker and cheaper than diamond core drilling but returns broken chips rather than intact rock. Explorers typically use it for a first pass to establish whether surface mineralisation continues at depth.

How significant is a 39.3% antimony rock chip result?

It is a high-tenor result, but rock chips are hand-picked samples of exposed vein material and do not represent an average grade over any mineable width. The value confirms that a strongly mineralised antimony system reaches surface at Oaky Creek. Drilling is what converts that observation into intercept grades and widths that can be modelled.

Why is antimony considered a critical mineral?

Antimony is used in flame retardants, battery alloys, glass manufacturing and defence applications including munitions, and both mine supply and processing capacity are concentrated in a small number of countries. That concentration has led the United States, Australia and the European Union to classify it as critical, which raises interest in new projects in stable jurisdictions.

Where does Red Mountain's stock trade and at what price?

The company's primary listing is on the Australian Securities Exchange as RMX, with a US over-the-counter line under RMXFF. RMXFF last traded at 0.01 as of the close on 28 August 2026, down 25.68% on the day from a prior close of 0.01. At sub-penny levels a single tick produces large percentage swings, so the quote is indicative.

When will investors see results, and what should they look for?

Assays are expected early in the next quarter, with an interim geological update likely once drilling finishes in roughly three weeks. The key tests are whether vein intercepts appear in multiple holes rather than one, whether widths and grades are meaningful together, and whether gold reports alongside antimony as a by-product credit.

Sources

• Red Mountain Mining Ltd Drilling Underway at Armidale Antimony-Gold Project — INN Precious Metals

Photo: Darya Sannikova · Pexels Licence — source