Key Highlights

  • Dart Mining NL (ASX:DTM) shares were priced at $0.011 on 20 October 2026, a gain of 15.79% in the session.
  • The company's 7 October 2026 release said a 1,500m diamond drilling program was scheduled to start at the Walwa Tin Project in the week of 12 October 2026.
  • Nine drill pads have been surveyed and permitted around the historic Walwa workings, and the deepest historic hole reached 160 m.

During the Trading session on 20 October 2026, Dart Mining NL (ASX:DTM) shares were priced at $0.011, a gain of 15.79%. Separately, the company released an announcement on 7 October 2026 titled "Maiden Drilling to Test Walwa System at Depth". The release said a 1,500m diamond drilling program was scheduled to begin at the Walwa Tin Project in northeast Victoria in the week of 12 October 2026, and it set out the geological targets, the historic data behind them and the next steps for the program.

Company Background

Dart Mining NL is a Melbourne-based Australian explorer with critical minerals and gold projects in Victoria, Queensland and Western Australia. The company says its strategy is systematic, technically driven exploration across several commodities, giving it exposure to tin, tantalum, tungsten, antimony and gold.

Near-term activity is centred on the Walwa Tin-Tantalum Project in northeast Victoria and the Triumph Gold Project in central Queensland. Dart Mining holds 100% owned granted tenements at Walwa (EL007426, 499 sq.km), Cudgewa (EL006866, 508 sq.km) and Berringama (EL007170, 27 sq.km). The portfolio also includes the Coonambula Antimony-Gold Joint Venture with Great Divide Mining (ASX:GDM), the McHargs tungsten prospect and the Yamarna Gold Project in Western Australia.

The Maiden Walwa Drilling Program

The announcement said the program moves Walwa from data review and sampling into the drill phase. It will test two never-drilled targets beneath the historic Walwa (Mt Alwa) tin mine. The first is tin-bearing aplite-pegmatite dykes at depth, where a seismic survey interpreted up to four further dykes more than 4 m thick. The second is a conceptual greisen target at the top of an interpreted intrusion, estimated at 400 m to 600 m below surface.

Drilling will start in the pit area, with later holes guided by what the first holes show. Nine drill pads have been surveyed by DGPS along the historic mine tracks, each positioned to allow several holes from one site. Core will be logged, photographed and assayed for tin, tantalum, niobium and a multi-element suite.

Historic Data and Surface Sampling

Walwa is recorded as Victoria's largest primary tin producer. Tin was first mined there in 1882, and about 97,000 t of ore was treated from the open pit before mining ended in the late 1960s. The company has verified 150 historic drill holes totalling 7,672 m, mostly shallow percussion holes from the 1970s and 1980s. The deepest reached 160 m and the average was about 50 m. One selected intercept was 9 m at 0.38% SnO2 from 89 m.

Union Corporation reported pre-JORC estimates of 8.64 Mt at 0.163% Sn in March 1982 and 993,000 t at 0.38% Sn in September 1983. Dart Mining said these are historical estimates, not prepared under the JORC Code 2012, and are not treated as current Mineral Resources. Rock chip sampling in June 2026 returned 3.96% Sn, with 165 ppm Ta and 197 ppm Nb, from an in-situ pegmatite sample on the pit wall, and three further samples graded 0.40% Sn to 1.09% Sn.

Sector Backdrop

Tin prices reached records in 2026. The London Metal Exchange contract rose above US$54,000 per tonne in January 2026, and a record of US$59,040 per tonne was reported in June 2026. By early September 2026 the price was about US$55,030 per tonne, still up more than 35% for the year. Cited Supply constraints include restrictions on exports from Myanmar's Wa state and licensing delays in Indonesia, where cumulative refined tin shipments were about 15% below the prior year as of September 2026.

Analysts have pointed to tin's use in semiconductor and electronics solder, with AI and data-centre spending cited as a Demand driver. BMI raised its 2026 average tin price forecast to US$51,500 per tonne and said it expected some easing in the fourth quarter.

Risks Shareholders Should Weigh

The company's forward-looking statement notes that its expectations rest on estimates and assumptions subject to known and unknown risks, and that actual results may differ materially. Walwa is an exploration project, and the greisen target and the seismic dykes are interpretations that drilling has not yet tested. Drilling may or may not intersect the mineralisation being sought.

The historic estimates were not prepared under the JORC Code 2012 and are not current Mineral Resources. Explorers of this kind depend on external funding for drilling, which the release does not address, and tin and tantalum prices have moved sharply during 2026.

What's Next

The company stated that diamond drilling at Walwa is scheduled to start in the week of 12 October 2026. It plans regular updates as drilling progresses, including geological observations from the core, and will report assay results when received and compiled.

Other listed steps are systematic rock chip and channel sampling of the tantalum-enriched albitite dykes at Snake Gully, and field inspection and sampling of the McHargs tungsten and Hall's gold prospects to confirm historical results and plan future drilling.