NSW regulator approves 32-hole RC drilling at Oaky Creek targeting antimony-gold. IP survey results due weeks before mid-year start.
Red Mountain Mining (ASX: RMX) has cleared the first regulatory hurdle for its next exploration phase at the Oaky Creek prospect within the Armidale antimony-gold project in New South Wales. The NSW mining regulator approved a reverse circulation drilling program of up to 32 holes reaching a maximum depth of 300 metres. Drilling is expected to start by mid-year, targeting antimony-gold zones defined by surface sampling over the past 12 months.
For traders tracking ASX-listed explorers, this approval removes a binary permitting risk and shifts focus to execution. The program will test the Oaky Creek South Main Grid antimony-arsenic auger soil anomaly and three targets at Oaky Creek North. Initial holes are planned to 100-150 metres depth to establish continuity of mineralisation from surface, with deeper holes testing down-dip extensions.
The approval came after Red Mountain submitted a comprehensive drilling plan supported by surface geochemistry. The company completed surface rock chip, conventional soil, and auger soil sampling across the prospect over the last year, defining multiple anomalies that now have drill targets.
The shallow holes (100-150m) are designed to confirm near-surface continuity. The deeper holes (up to 300m) target the down-dip potential of orogenic antimony vein systems, which at nearby Hillgrove (Larvotto Resources, ASX: LRV) extend over vertical depths exceeding 1 kilometre.
Red Mountain engaged Fender Geophysics earlier this month to conduct an orientation induced polarisation (IP) survey at Oaky Creek South. The survey consisted of three 1.6km-long, 100m-spaced northwest-southeast lines and a 1.5km southwest-northeast cross line. Fender used gradient array induced polarisation (GAIP) and dipole-dipole IP to detect resistivity and chargeability responses for steeply-dipping narrow structures.
Red Mountain said it may also complete a more comprehensive IP survey over the entire Oaky Creek prospect to map antimony mineralisation that lacks a surface geochemical expression.
The Armidale project sits in the Southern New England Orogen (SNEO), west of Hillgrove – Australia's largest antimony deposit and the eighth-largest globally. The SNEO is recognised as the country's premier antimony province, with mineralisation occurring in hydrothermal quartz veins, breccias, and stockworks, often with associated gold and tungsten.
Oaky Creek is Armidale's most advanced prospect and one of several known orogenic antimony-gold occurrences within the tenement. The drilling program will test:
The geological setting is analogous to Hillgrove, where narrow (1m) vein-style mineralisation is surrounded by broader (up to 20m) silica-sericite alteration envelopes. The IP survey is designed to detect subtle conductivity and resistivity variations associated with these structures.
Red Mountain is a small-cap explorer with a market capitalisation that makes it sensitive to exploration outcomes. The Oaky Creek drilling is the company's most advanced catalyst for 2026. A positive result could drive significant re-rating; a negative result would likely see the stock retrace to pre-approval levels.
Antimony is used in flame retardants, lead-acid batteries, and increasingly in defence applications (munitions, night vision). Supply is concentrated in China, which has tightened export controls in recent years. Any new source of antimony, especially from a stable jurisdiction like Australia, would be watched by industrial buyers and strategic metals traders.
Gold is a secondary product at Oaky Creek. If gold prices remain elevated (above $2,000/oz), the gold component adds optionality to the project economics. Conversely, a sharp gold sell-off would reduce the attractiveness of the gold by-product.
For traders, the Oaky Creek drilling represents a high-conviction binary catalyst in a sector where regulatory approvals are often the first major gate. The IP survey results, expected within weeks, will be the next de-risking event. If the geophysics aligns with the surface geochemistry, the mid-year drilling campaign becomes a clear watchlist item for ASX small-cap exposure to antimony and gold.
For broader context on commodity markets and exploration risk, see AlphaScala's commodities analysis and gold profile.
Prepared with AlphaScala research tooling and grounded in primary market data: live prices, fundamentals, SEC filings, hedge-fund holdings, and insider activity. Each story is checked against AlphaScala publishing rules before release. Educational coverage, not personalized advice.