Rock chips return highest ever antimony grades at Red Mountain’s Armidale project
Red Mountain’s rock chip sampling has returned the highest-grade antimony result ever at its Armidale project. Pic: Getty Images
- Record 39.3% antimony grades hit at Oaky Creek prospect within Red Mountain’s Armidale project
- Five samples exceeded 1% antimony with four also containing gold up to 1.09g/t, the first time over 1g/t recorded
- Additional assay results pending as company plans expanded sampling across 1.5km antimony soil anomaly
Special Report: Rock chip sampling at the Oaky Creek prospect has returned up to 39.3% antimony, the highest grades of the critical mineral seen by Red Mountain Mining to date at its Armidale project in NSW.
The 18 rock chip samples collected during a recent hand auger soil sampling campaign confirmed the potential of Oaky Creek to host a major orogenic antimony-gold camp with five returning antimony values of more than 1%.
Four of these samples also returned more than 0.1g/t gold with a peak value of 1.09g/t, the first time a result of over 1g/t has been recorded at the prospect.
All five samples lie within ~100m of the crest on the western flank of a low northwest-trending ridge and none are thought to have been transported far from source.
Mineralised samples have now been collected over a strike length of 500m at Oaky Creek South and 700m at Oaky Creek North with significant additional untested extensions indicated by the ~1.5km long antimony soil anomaly at Oaky Creek North.
Red Mountain Mining’s (ASX:RMX) Armidale antimony-gold project is about 85km west of Larvotto’s (ASX:LRV) Hillgrove project – Australia’s largest known antimony deposit.
It sits within the Southern New England Orogen, which is also recognised as Australia’s premier antimony province.
Antimony occurs in hydrothermal quartz veins, breccias and stockworks, often with associated gold and/or tungsten mineralisation.

More assays pending
RMX notes that assay results are pending later this month for the 10m and 20m spaced hand auger soil sampling completed at Oaky Creek South.
Assays are also pending for the initial 50m by 100m spaced soil sampling at the East Hills antimony prospect in the southern portion of EL9732, which hosts the Armidale project.
RMX had collected 78 samples centred on historical workings at East Hill.
Subject to positive results for the pending assays from Oaky Creek South, the company plans to undertake a similar program of hand auger soil and rock chip sampling over the Oaky Creek North soil anomaly to define prospective drill targets.
It also plans to carry out soil and rock chip sampling for the Horsley Station and Horsley North gold targets after securing land access.
Land access is also being sought to ground truth stibnite and jarosite spectral anomalies across EL9732, particularly those that are adjacent to known mineralisation and/or are along the known major Peel, Namoi and Cobbadah faults.
In the meantime, RMX management says it will continue to assess value accretive critical metals assets in North America, as the company has the funding in place to do so following a recent oversubscribed placement.
This article was developed in collaboration with Red Mountain Mining, a Stockhead advertiser at the time of publishing.
This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.
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