Key Highlights

  • Trench TTD-002 returned 4.9 metres at 0.48g/t gold and 7.71% antimony.
  • Within that trench, 1.2 metres graded 0.46g/t gold and 30.2% antimony.
  • Mapping identified two mineralisation styles: quartz vein-hosted antimony and hydrothermal replacement within intrusive units.
  • The trenching was carried out in a joint venture with Mining One Consultants over a gold-antimony soil anomaly about 1 kilometre long.

Infinity Mining (ASX:IMI) reported trench sampling results from its Tanjil Dome Project in Victoria on 11 November 2026. The work was carried out under a joint venture with Mining One Consultants and tested 10 trenches comprising 62 channel intervals over 58.1 metres, within a gold-antimony soil anomaly about 1 kilometre long.

Trench TTD-002 returned 4.9 metres at 0.48 grams per tonne gold and 7.71% antimony, which the company expresses as 26.92g/t gold equivalent. That included 1.2 metres at 0.46g/t gold and 30.2% antimony, or 104.06g/t gold equivalent.

Trench TTD-008 returned 0.6 metres at 1.22g/t gold and 3.69% antimony, and TTD-006 returned 5 metres at 1.3g/t gold and 0.02% antimony.

Reading the gold-equivalent figures

Gold-equivalent grades combine two metals into a single number using assumed prices and recoveries. Infinity's calculation assumes a gold price of US$4,000 an ounce, an antimony price of US$50 a kilogram, and recoveries of 85% for gold and 75% for antimony.

There is no project-specific metallurgical testwork yet, so those recovery assumptions are not based on Tanjil Dome material. Antimony contributes about 98% of the TTD-002 composite, which means the headline equivalent grade is mostly an antimony story. Investors may find it clearer to look at the antimony percentages directly.

Antimony prices have been elevated and volatile since China, the dominant producer, restricted exports, so a lower antimony price would reduce the equivalent grades materially.

Two styles of mineralisation

Mapping identified at least three quartz vein exposures within a weathered, altered dyke, together with stibnite replacement mineralisation. Stibnite is the main antimony sulphide mineral.

Mining One Geology Manager Stuart Hutchin said the work revealed two distinct styles: quartz vein-hosted antimony and hydrothermal replacement within intrusive units. He said the replacement style suggested antimony was not restricted to discrete quartz veins, which could broaden the potential Volume of mineralised rock.

The company says the geology shares broad similarities with Southern Cross Gold's (ASX:SX2) Sunday Creek deposit, about 100 kilometres away. Geological similarity does not imply a comparable deposit, and Sunday Creek's grades and scale should not be assumed for Tanjil Dome.

Why it matters

Victoria has seen a resurgence of interest in gold-antimony systems following the success at Sunday Creek and renewed Demand for antimony in defence and energy applications. Surface results of this grade give Infinity a reason to move quickly towards drilling.

Qualifications

True widths and continuity have not been confirmed. The soil anomaly is a geochemical footprint only, and trenching has tested a small part of it. Channel samples at surface may be affected by weathering, which can enrich or deplete certain elements.

Chairman Cameron Petricevic said the initial trenching had tested only a small portion of the broader anomaly.

Infinity's broader portfolio spans copper, gold, antimony and lithium projects across New South Wales, Victoria and Western Australia. Tanjil Dome is therefore one of several exploration options, and the company's ability to fund drilling there will depend on how it prioritises spending across those assets. Approvals for exploration drilling on Crown land in Victoria can also take some months.

Next steps

The joint venture plans to integrate the assays with mapping and earlier soil data to refine targets. Trenching along existing tracks at Tanjil Dome and Good Hope will continue while the company progresses drill design and work plan submissions, subject to access and approvals.

Petricevic said the company looked forward to working with Mining One to refine targets for further trenching and maiden drilling. That maiden drilling will be the first test of whether the surface grades persist at depth.