Red Mountain Mining Delivers Exceptional Antimony Results at Armidale Project
Red Mountain Mining Limited (ASX: RMX) has announced outstanding high-grade Red Mountain Mining Armidale antimony results from its Armidale Antimony-Gold Project in New South Wales, with soil sampling delivering a peak value of 1,200 ppm antimony and 13 samples exceeding 100ppm antimony across the program. The results significantly advance the company's exploration of what appears to be a major antimony-gold system analogous to Australia's largest antimony deposit.
The latest soil sampling campaign at Oaky Creek South has identified a coherent 200m-long northeast-striking antimony-arsenic anomaly that remains open to the northeast. Furthermore, auger drilling returned an exceptional 1.36% antimony result—over 10 times higher than the next highest recorded value.
These Red Mountain Mining Armidale antimony results, combined with previously reported rock chip samples of up to 39.3% antimony, have prompted immediate planning for a December exploration program. The company aims to define specific drill targets following these encouraging developments.
Oaky Creek South Reveals Extensive Mineralisation System
The comprehensive soil sampling program at Oaky Creek South collected approximately 250 auger soil samples across two main grids. Consequently, this revealed the presence of what appears to be a significant orogenic antimony-gold system.
Key Highlights from Oaky Creek South:
- Peak soil antimony value: 1,200 ppm
- Coherent anomaly: 200m long, 30m wide, northeast-trending
- High-grade samples: 9 samples containing >100ppm antimony
- Exceptional auger result: 1.36% antimony (13,600 ppm)
- Associated gold values: Peak of 14ppb gold in highest antimony sample
The Oaky S Main grid, located 400m north-northwest of historical workings, identified a coherent >20ppm antimony anomaly. This anomaly parallels mapped quartz-carbonate-sulfide veins and shows strong spatial correlation with previously reported high-grade rock chip samples.
Moreover, the anomaly remains open to the northeast toward the major Namoi Fault splay. Arsenic results closely mirror the antimony pattern, with 27 samples containing >100ppm arsenic and a maximum value of 1,040ppm. This provides additional confirmation of the mineralising system's extent and intensity.
Understanding Orogenic Gold-Antimony Systems
Orogenic deposits represent one of the most significant sources of gold and antimony globally. These systems form during mountain-building processes when hot, mineral-rich fluids are channelled through fault systems and structural weaknesses in the Earth's crust.
These systems are characterised by:
- Structural control: Mineralisation follows major fault systems and fracture networks
- Hydrothermal origin: Hot fluids deposit metals in quartz veins and altered rock zones
- Associated pathfinder elements: Antimony, arsenic, and tungsten commonly occur with gold
- Vein-style mineralisation: Metals concentrate in distinct veins and stockwork zones
For investors, orogenic systems are particularly attractive because they can extend over significant strike lengths and depths. In addition, they often contain multiple high-grade shoots that can support long-term mining operations.
The presence of both antimony and gold enhances economic potential. This is especially relevant given antimony's current status as a critical mineral.
East Hills Shows Additional Promise
Red Mountain's September soil sampling at East Hills collected 78 samples across a systematic grid. However, this revealed encouraging antimony anomalies with a peak value of 104ppm antimony near historical workings.
| Location | Peak Sb (ppm) | Peak Au (ppb) | Anomaly Trend |
|---|---|---|---|
| East Hills | 104 | 304 | NNW-striking |
| Oaky Creek South (Main) | 1,201 | 9 | NE-striking |
| Oaky Creek South (Workings) | 13,600 | 14 | Associated with veins |
The East Hills results define a NNW-trending antimony anomaly that remains open to the southeast. Furthermore, two gold samples returned 14ppb and 304ppb gold, suggesting spatial association between the metals similar to the Oaky Creek system.
What Does December's Program Entail?
Red Mountain has outlined an aggressive exploration program for December 2024 designed to rapidly advance toward drilling. The Red Mountain Mining Armidale antimony results have provided clear direction for this next phase.
Immediate Next Steps:
- Extend Oaky S Main grid northeast toward the Namoi Fault system
- Sample connecting areas between Main Grid and historical workings
- Test 1km-long antimony anomaly extending from Oaky Creek North
- Define drill-ready targets for H1 2026 drilling campaign
The company's systematic approach focuses on connecting known high-grade zones with newly identified anomalies. Consequently, this may potentially reveal a much larger mineralised system than initially recognised.
Strategic Position in Australia's Premier Antimony District
Red Mountain's Armidale project sits in the New England Orogen, recognised as Australia's premier antimony district. The project extends 85km along the western side of the Peel Fault System.
Regional Context:
- Peel Fault System: Over 400 known mineral occurrences along 400km strike
- Underexplored potential: Less than 200 drillholes across entire system length
- Proximity advantage: Located west of Larvotto's Hillgrove deposit (Australia's largest antimony deposit)
- Infrastructure access: Established mining district with existing infrastructure
The geological similarities between Red Mountain's prospects and the Hillgrove deposit are significant. The Hillgrove deposit is currently subject to a takeover attempt by United States Antimony Corporation (NYSE: UAMY).
This underscores the potential significance of the Armidale project in a global context. Supply security has become a critical strategic concern for antimony worldwide.
Why Should Investors Follow Red Mountain Mining?
Red Mountain Mining has positioned itself at the intersection of two major investment themes: critical minerals security and Australian gold exploration. The exceptional Red Mountain Mining Armidale antimony results demonstrate several compelling investment characteristics.
Exceptional grades and scale: Peak soil results of 1,200 ppm antimony and rock chip samples up to 39.3% antimony indicate world-class mineralisation potential. Furthermore, the 200m coherent anomaly suggests significant system scale.
Strategic location advantage: Positioning within Australia's premier antimony district, adjacent to the largest known antimony deposit, provides both geological confidence and potential infrastructure benefits. This advantage becomes more valuable as the sector develops.
Critical minerals exposure: Antimony's designation as a critical mineral, combined with recent supply chain concerns, creates a favourable commodity environment. This particularly benefits developers with high-grade assets like Red Mountain.
Systematic exploration approach: The company's methodical grid-based sampling, immediate follow-up planning, and clear pathway to drilling demonstrates disciplined project advancement. This maximises discovery potential while managing exploration capital efficiently.
Diversified portfolio strength: Beyond Armidale, Red Mountain maintains a US critical minerals portfolio including antimony projects in Utah and Idaho. This provides multiple pathways to value creation in the critical minerals space.
Management Commentary
"These highly encouraging soils results, alongside the previously reported high-grade antimony rock mineralisation of up to 39.3% Sb, has prompted immediate planning for the field team to launch an exploration program in December to define specific drill targets."
The combination of world-class grades, strategic location, and systematic exploration approach positions Red Mountain as a compelling critical minerals investment opportunity. This is particularly relevant as global antimony supply security becomes increasingly important for Western economies.
With exceptional soil results now confirmed and drilling planned for early 2026, investors should monitor this emerging critical minerals story closely. The company continues to advance toward resource definition in one of Australia's most prospective antimony districts, making the Red Mountain Mining Armidale antimony results a key development to watch.
Want to Learn More About Red Mountain Mining's Critical Minerals Portfolio?
Red Mountain Mining's exceptional antimony results at Armidale represent just one facet of their comprehensive critical minerals strategy. With world-class grades confirmed through systematic exploration and drilling planned for early 2026, RMX is advancing rapidly toward resource definition in Australia's premier antimony district. To explore their full portfolio of critical minerals projects across Australia and the United States, including detailed technical reports, corporate presentations, and upcoming exploration milestones, visit Red Mountain Mining's dedicated investor hub at investorhub.redmountainmining.com.au and discover why this emerging critical minerals story deserves your attention.
