Discovery Alert - Red Mountain Mining Exploration Program Advances Critical Antimony Discovery

Red Mountain Expands High-Grade Antimony Exploration as Critical Metal Shortage Intensifies

Red Mountain Mining (ASX: RMX) has commenced an expanded Red Mountain Mining exploration program at its flagship Oaky Creek antimony prospect, positioning itself to capitalise on unprecedented demand for critical minerals. The company’s latest auger soil sampling initiative targets a 3-kilometre strike of high-grade antimony mineralisation that has already returned exceptional results of up to 39.3% antimony and 1.09ppm gold.

The timing couldn’t be more strategic. With antimony prices soaring from historical levels of US$0.20/lb to up to US$51,500 per tonne in late 2025, and China restricting supply to Western countries, Red Mountain’s 400km² Armidale Antimony-Gold Project represents a rare opportunity in Australia’s premier antimony province.

Oaky Creek Emerges as Large-Scale Orogenic System

The Red Mountain Mining exploration program at Oaky Creek is designed to systematically test the full extent of what appears to be a significant orogenic antimony-gold vein system. Recent sampling has identified five distinct mineralised areas across a 3km strike length, with high-grade results including:

• 39.3% antimony from surface samples

• Multiple samples exceeding 25% antimony

• Coherent soil anomalies extending up to 200m in length and 30m in width

• Peak auger sample of 1,201ppm antimony

The prospect features quartz-carbonate-stibnite veins and breccias within metamorphosed Carboniferous sequences—geology remarkably similar to Larvotto Resources’ (ASX: LRV) Hillgrove deposit, Australia’s largest antimony deposit located just to the east.

Key Exploration Targets

Target AreaStrike LengthPeak ResultsStatusOaky Creek North1.2km>25% SbPrimary targetOaky Creek South200m+1,201ppm Sb (auger)Extension openCentral Corridor500-800m>25% SbNew discovery

Understanding Orogenic Antimony-Gold Mineralisation

Orogenic deposits form during mountain-building processes where hot, metal-rich fluids migrate along fault systems and deposit minerals in quartz veins. These systems are particularly valuable because they often contain both antimony and gold in economic concentrations.

Formation Process

During periods of crustal compression and mountain formation, deeply buried rocks release hot fluids enriched with metals. These fluids travel upward through fractures and fault systems, cooling and depositing minerals as they encounter suitable geological conditions.

The resulting deposits typically form in quartz-filled veins that can extend for kilometres. Furthermore, these geological formations are particularly attractive because they often occur in clusters, meaning successful exploration at one location can lead to multiple discoveries across the broader project area.

Why This Matters to Investors

Orogenic systems typically extend over large areas and can host multiple deposits along a single fault corridor. Red Mountain’s 3km strike length at Oaky Creek suggests the potential for a district-scale discovery similar to Hillgrove, which contains Australia’s eighth-largest global antimony resource.

Strategic Timing with Critical Metal Shortage

The Red Mountain Mining exploration program comes at a crucial time for Western supply chains. Both Australian and US governments have designated antimony as a critical strategic metal, with severe supply constraints driving unprecedented price increases.

Market Context

Larvotto Resources (ASX: LRV): Market cap $766M, Hillgrove mine entering production mid-2026

Projected global impact: Hillgrove will meet approximately 7% of global antimony demand

Supply shortage: China limiting antimony exports to Western countries

Price surge: From $0.20/lb historically to $51,500/tonne in 2025

“Both the Australian and US governments have explicitly identified antimony as a critical strategic metal, with significant constraints on supply and uncertainty around supply chain security driving strong interest in exploration and development projects.”

The company’s strategic positioning becomes even more compelling considering its funding support from three High Net Worth/Family Office investors who are also featured in Larvotto’s Top 20 shareholders. This represents a strong endorsement from investors with proven success in the antimony sector.

Comprehensive Exploration Program Accelerates

Red Mountain’s systematic approach to exploring the Armidale project demonstrates the scale and methodical planning required for a 400km² tenure. The current auger sampling program is designed to achieve specific objectives whilst maximising discovery potential.

Phase 1 Objectives (Q1 2026)

• Test full 1.2km strike at Oaky Creek North primary target

• Extend the 200m antimony-arsenic anomaly at Oaky Creek South (open to northeast)

• Sample the corridor between historical workings and recent discoveries

Expected Outcomes

Program completion: March 2026 including all analytical results

Drilling targets: Multiple orogenic antimony-gold targets defined for H1 2026

Resource potential: Systematic grid approach to maximise discovery potential

The company’s auger sampling has already proven highly effective, with the technique successfully mapping near-surface mineralisation. In addition, it has defined coherent anomalies that correlate directly with quartz-carbonate-sulfide veins.

Auger Soil Sampling Technique Explained

Auger sampling involves drilling shallow holes (typically 1-3 metres deep) to collect soil samples for chemical analysis. This cost-effective technique can identify mineral anomalies over large areas, helping geologists pinpoint the most promising locations for more expensive diamond drilling programs.

Expanding Portfolio of Critical Metal Assets

Beyond Oaky Creek, the Red Mountain Mining exploration program is advancing multiple high-priority targets across its Armidale project. However, the company’s ambitions extend beyond Australia with strategic US holdings.

Additional Australian Targets

East Hills: Initial rock chip results of 9.9% antimony

Horsley Station: Gold prospect with encouraging early results

Horsley North: Magnetic target requiring follow-up

US Portfolio

Utah Antimony Project: Southern Utah location

Yellow Pine Project: Less than 2km from Perpetua Resources’ Stibnite Project (NASDAQ: PPTA)

Silver Dollar Project: Historic antimony mine with up to 17.7% antimony

The company has also completed extensive due diligence on additional opportunities and expects to announce further growth initiatives in early February. This suggests an aggressive expansion strategy to capitalise on the current critical metals shortage.

Why Should Investors Track Red Mountain Mining?

Red Mountain Mining presents a compelling investment opportunity at the intersection of critical mineral shortages, strategic government priorities, and proven geological targets. The company’s systematic approach to exploration, combined with funding from experienced antimony investors, positions it uniquely in the current market environment.

Key Investment Drivers

FactorAdvantageGeological SimilarityDirect comparison to $766M Larvotto’s Hillgrove depositScale Potential3km strike length, 400km² total tenureStrategic TimingCritical mineral shortage, government supportExperienced BackingFunding from Larvotto Top 20 shareholdersSystematic ApproachMethodical exploration defining multiple drill targets

Upcoming Catalysts

March 2026: Complete auger sampling results

H1 2026: Drilling program at defined targets

Early February: New project acquisition announcements

Mid-2026: Larvotto’s Hillgrove production validates regional potential

“With funding secured in late 2025, which was again supported by three High Net Worth/Family Office investors who have featured in the Top 20 of Larvotto (ASX: LRV), Red Mountain is fully funded to execute the comprehensive exploration program.”

Critical Metal Supply Context

The antimony market represents one of the most constrained critical mineral sectors globally. Unlike many commodities where multiple suppliers exist across different continents, antimony production is heavily concentrated in China, which has implemented export restrictions to Western countries.

This creates exceptional opportunities for Western-based antimony projects with proven geological potential. Consequently, the Red Mountain Mining exploration program is particularly well-positioned to benefit from this supply constraint.

Key Takeaway for Investors

Red Mountain Mining has positioned itself as a major player in the critical antimony sector, with significant upside potential due to its geological similarity to Australia’s largest antimony deposit. Moreover, strategic government backing and systematic exploration approach further enhance its prospects.

With drilling targets being defined for H1 2026 and potential new acquisitions in February, investors should closely monitor this emerging critical minerals story. The combination of proven geology, strategic timing, and experienced backing makes the Red Mountain Mining exploration program a compelling opportunity for investors seeking exposure to the critical minerals shortage that’s reshaping global supply chains.

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