Red Mountain Mining has identified a significant chargeability anomaly extending over 400m at its Oaky Creek South prospect, setting the stage for a 32-hole drilling campaign starting mid-July 2026.
- Chargeability anomaly extends 400m along strike and 100m deep
- Maiden reverse circulation drilling program to start 20 July
- Up to 32 holes planned to 300m depth with flexible targeting
- Oaky Creek hosts a 3km orogenic antimony-gold system
- Project analogous to Australia’s largest antimony deposit at Hillgrove
Geophysical Modelling Reveals Expanded Antimony Target
Red Mountain Mining (ASX:RMX) has unveiled a substantial chargeability anomaly beneath its Oaky Creek South prospect in New South Wales, extending the known mineralised footprint well beyond surface indications. The company’s recent 2D and 3D modelling of dipole-dipole induced polarisation (DDIP) data highlights a coherent NNE-SSW striking, steeply southeast-dipping anomaly with peak chargeability over 7.2 mV/V, significantly above typical background levels of 2-3 mV/V.
This anomaly stretches at least 400 metres along strike, more than triple the ~120m surface vein extent, and plunges over 100 metres vertically, remaining open to the south-southwest. The geophysical signature aligns with surface quartz-carbonate-stibnite veins and historical shallow antimony workings, suggesting the veins persist at depth and along strike, boosting the prospect’s scale and drill target potential.
Maiden Drilling Program Set to Test Multiple Targets
With this geophysical insight, Red Mountain has secured Durock Drilling to commence a maiden reverse circulation (RC) drilling campaign starting the week of 20 July 2026. The program, fully approved by the NSW Resources Regulator, will comprise up to 32 holes to a maximum depth of 300 metres, focusing on four of five high-priority antimony-gold targets defined through extensive surface rock chip and soil sampling.
Initial holes will be shallower, between 100 and 150 metres, to confirm near-surface continuity, with flexibility to extend deeper based on early results. This adaptive strategy allows the company to chase depth and strike extensions of mineralisation, reflecting the known significant vertical extent of analogous orogenic antimony systems such as Larvotto Resources’ Hillgrove deposit, which extends over 1 kilometre vertically.
Oaky Creek: A Promising 3km Antimony-Gold System
Oaky Creek is Red Mountain’s flagship target within its 391 km2 Armidale Antimony-Gold Project, situated in Australia’s premier antimony province, the Southern New England Orogen. The prospect features tightly folded Carboniferous metasediments hosting hydrothermal quartz-carbonate-stibnite veins and breccias, with historical shallow pits and shafts at both Oaky Creek North and South.
Recent surface sampling campaigns have delineated a continuous ~3km strike length of orogenic antimony mineralisation, with rock chip assays up to 39.3% antimony and 1.09 ppm gold. These results, combined with the geophysical data, position Oaky Creek as analogous to Larvotto’s Hillgrove project, Australia’s largest antimony deposit.
Strategic Position Within a Tier-1 Mining District
Red Mountain’s Armidale project lies along an 85km corridor adjacent to the Peel Fault, a major structural feature with over 400 known gold and base metal occurrences but limited systematic exploration. The project’s geology comprises folded Carboniferous metasediments and ultramafic mélanges, setting a compelling stage for further discovery. The company’s comprehensive exploration approach, including geophysical surveys and detailed soil sampling, underpins its advancing development strategy.
Drilling results from the upcoming campaign are expected by the end of the current quarter, which will be a critical milestone in validating the subsurface extent and grade of the Oaky Creek mineralisation. The company’s ability to adjust drilling targets dynamically based on initial findings will be key to efficiently testing this large, open-ended system.
Bottom Line?
Red Mountain’s upcoming drilling at Oaky Creek could unlock a significant new antimony-gold resource, but the real test will be how the subsurface assays match the promising geophysical targets.
Questions in the middle?
- Will the maiden drilling confirm the depth and strike extensions suggested by the DDIP anomaly?
- How might early assay results influence the flexibility and focus of the ongoing drilling campaign?
- Could Oaky Creek’s system rival the scale and grade of Larvotto’s Hillgrove deposit if further mineralisation is confirmed?