Red Mountain Mining Wraps Oaky Creek Drilling With Assays Due Mid-November
Key Takeaways
- Red Mountain Mining has completed its maiden 20-hole, 1,776m RC drilling program at the Oaky Creek Antimony Prospect, testing four priority targets across a 3km orogenic antimony-gold system west of Armidale, NSW.
- Assay results from Intertek are expected by mid-November 2026, covering 578 one-metre intervals submitted from 19 of the 20 holes — the single most important catalyst for RMX investors to watch.
- Surface rock chip results of up to 39.3% Sb and 1.09ppm Au at the Oaky Creek South Main Grid set a high bar for what the drill program could confirm at depth.
- A July 2026 DDIP geophysical survey defined a chargeability anomaly at Oaky Creek South Workings peaking at 7.2 mV/V — more than double background — modelled to extend from surface to at least 200m depth over a 400m strike extent.
- The Southern New England Orogen benchmark is Larvotto Resources' Hillgrove project, the 8th largest antimony deposit globally with a market cap of approximately AU$620 million, providing explicit scale context for what this jurisdiction can host.
Drilling wrapped up at Oaky Creek as assay results await
Red Mountain Mining (ASX: RMX) has completed its maiden reverse circulation (RC) drilling program at the Oaky Creek Antimony Prospect, west of Armidale in New South Wales. The program comprised 20 holes totalling 1,776m, testing four priority targets across what the company describes as a significant orogenic antimony-gold system.
Assay results are expected by mid-November 2026, making that the primary catalyst investors should watch. On-site screening using a portable XRF (pXRF) instrument was used to prioritise samples for laboratory analysis, with 578 one-metre intervals (representing 32.5% of total drilling) from 19 of the 20 holes submitted to Intertek for four-acid digest multielement analysis and gold analysis by fire assay.
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Four targets drilled across a 3km antimony system
The program tested four of five priority targets defined through an extensive surface work programme conducted over the past 12 months. That work included an approximately 1,300-sample infill hand auger soil sampling campaign, conventional soil sampling, rock chip sampling, and a July 2026 dipole-dipole induced polarisation (DDIP) geophysical survey.
The DDIP survey produced a particularly notable result at Oaky Creek South Workings: a coherent chargeability anomaly with a peak observed value of 7.2 mV/V, compared to background values typically ranging from 2 to 3 mV/V. The anomaly is modelled to extend from surface to a depth of at least 200m over a strike extent of at least 400m, substantially expanding that target ahead of drilling.
The Oaky Creek South IP target expansion followed the July 2026 DDIP survey that defined the chargeability anomaly, with modelling indicating the mineralised system extends well beyond the original surface footprint identified through soil and rock chip sampling.
The four areas tested during the program were:
- Oaky Creek South Main Grid (10 holes): A 300m x 30m auger soil anomaly with surface rock chip results up to 39.3% Sb and 1.09ppm Au
- Oaky Creek North Workings (3 holes): Historical workings with outcropping quartz-carbonate-stibnite veins
- Antimony-Bearing Creek Exposure north of North Workings (4 holes): Testing beneath an Sb-bearing creek exposure
- Oaky Creek South Workings and IP target (3 holes): Historical workings, outcropping veins, and the IP chargeability anomaly described above
A fifth target, the Oaky Creek North South Extension, was not drilled during this program due to the presence of crops in the ground.
| Target Area | Holes Drilled | Key Surface Results | Max Hole Depth (m) | Notes |
|---|---|---|---|---|
| Oaky Creek South Main Grid | 10 | Rock chips up to 39.3% Sb & 1.09ppm Au; auger soil up to 1,201ppm Sb | 120 | Coherent 300m x 30m auger soil anomaly |
| Oaky Creek North Workings | 3 | Rock chips up to 36.3% Sb & 0.46ppm Au; auger soil up to 525ppm Sb | 99 | Historical workings; outcropping quartz-carbonate-stibnite veins |
| Antimony-Bearing Creek Exposure | 4 | Rock chips up to 28.3% Sb & 0.54ppm Au; auger soil up to 3,011ppm Sb | 120 | Located north of Oaky Creek North Workings |
| Oaky Creek South Workings and IP target | 3 | Auger soil up to 1.36% Sb; IP chargeability anomaly peak >4 mV/V | 120 | Historical workings; strong IP anomaly modelled to at least 200m depth |
Surface results sourced from Figure 1 of the ASX announcement. Assay results from drilling are pending.
Why antimony in the New England Orogen matters right now
Orogenic antimony-gold systems form within ancient mountain belts where deep crustal fluids deposit metals along fault and fracture networks. These systems can host large, high-grade deposits because mineralising fluids travel through extensive plumbing networks, concentrating metal over considerable strike lengths.
Antimony is classified as a critical mineral in Australia and the United States because of its importance in providing the United States and other Western countries with a reliable, high-quality source of commodity supply. That strategic significance is drawing serious exploration capital toward projects in friendly jurisdictions.
The Southern New England Orogen (SNEO) in New South Wales is considered Australia’s premier antimony mineral province. The most prominent benchmark in the region is Larvotto Resources’ (ASX: LRV, market cap approximately AU$620 million) Hillgrove project, which lies east of Red Mountain’s project area. Hillgrove is recognised as Australia’s largest known antimony deposit and the 8th largest globally, providing an explicit scale reference for what orogenic systems in this jurisdiction can host.
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What comes next for RMX investors
The near-term focus is straightforward: assay results from Intertek are expected by mid-November 2026. Those results will determine the scale and direction of the next exploration phase at Oaky Creek and more broadly across the 391 km² Armidale Antimony-Gold Project.
One target remains untested from the original five identified at Oaky Creek. The North South Extension was inaccessible during this program due to crops in the ground, and remains available for future work once those results are in hand and a follow-up programme is planned.
Red Mountain also holds a broader critical minerals portfolio in the United States, including the Pioneer Tungsten Project in Montana, the Utah Antimony Project, the Thompson Falls Antimony Project, and the Yellow Pine Antimony Project, reinforcing the company’s diversification across strategic commodities. The mid-November assay release will be the defining moment for understanding whether the surface geochemistry at Oaky Creek has been confirmed at depth.
The Utah Antimony Project acquisition was part of a deliberate strategy to build exposure across multiple antimony-bearing jurisdictions, with US-based assets adding a geopolitical diversification layer to the company’s critical minerals position.
Ready to Follow the Oaky Creek Assay Results as They Land?
Red Mountain Mining’s maiden RC drilling program across 20 holes has tested four priority antimony-gold targets within the Southern New England Orogen, with rock chip results of up to 39.3% Sb already flagging exceptional surface grades ahead of the mid-November 2026 assay release.
To stay ahead of the results and explore the full scope of the Armidale Antimony-Gold Project, visit the Red Mountain Mining investor profile on Discovery Alert for project updates, technical analysis, and the latest company developments.