Key Highlights

  • Combined diamond intercept of 722.3m at 0.44% Cu, 0.13g/t Au in hole NANRCD005, the largest single intercept reported at Nanadie, with mineralisation extending well beyond the current 40.4Mt Mineral Resource Estimate boundary
  • Assays from 15 diamond drill tails (3,327m) and 26 RC holes (7,296m) delivered numerous wide, high-grade copper-gold intercepts during the quarter, with the system now extending over at least 1.5km of strike and 1km of width
  • RC drilling identified significant shallow, previously unrecognised high-grade zones to the north, including 18m at 2.29% Cu and 1.12g/t Au to end-of-hole in NANRC057
  • Solstice held A$41.3 million in cash with no Debt at quarter-end, providing substantial runway for ongoing multi-rig drilling

Solstice Minerals Limited (ASX:SLS) reported its September 2026 Quarterly Activities Report, describing the three months to 30 September 2026 as the company's busiest exploration period to date at its 100%-owned Nanadie Copper-Gold Project in Western Australia's Goldfields region. Multi-rig reverse circulation and diamond drilling continued to deliver exceptional results, extending mineralisation in multiple directions well beyond the current resource boundary.

Nanadie's Mineral Resource Estimate currently stands at 40.4 million tonnes. Drilling during the quarter consistently extended copper-gold mineralisation beyond that boundary, with both the depth and lateral extents of the system growing with each completed drill program. The mineralised system now demonstrates continuity over at least 1.5 kilometres of strike and approximately 100 to 200 metres of width, which remains open to the north, south and at depth.

Standout Diamond Drilling Intercepts

The highlight of the quarter was hole NANRCD005, which returned a combined RC and diamond intercept of 722.3 metres at 0.44% copper and 0.13 grams per tonne gold, inclusive of low-grade and unmineralised intervals. On the same drill section, hole NANRCD004, reported previously, returned 629.1 metres at 0.50% copper and 0.17g/t gold to end-of-hole. Together, these two holes on a single section establish a picture of extraordinary continuity and scale in the Nanadie system beyond the existing resource model.

Other notable diamond results from the quarter include NANRCD001 returning 169.3m at 0.87% Cu and 0.29g/t Au, including 73.3m at 1.07% Cu; NANRCD014 returning 54.8m at 0.83% Cu and 64.1m at 0.94% Cu; NANRCD018 returning 148m at 0.77% Cu; and NANRCD058 returning 91.4m at 0.97% Cu and 0.42g/t Au. An exceptional silver intercept of 7m at 1,019g/t silver, including 2m at 3,103g/t silver, was also encountered in hole NANRCD017.

RC Drilling Extends Shallow High-Grade Zones

RC drilling along the 1.5km strike length of the Nanadie system continued to identify shallow, previously unrecognised high-grade zones, particularly to the north of a local cross-fault. Standout RC intercepts included NANRC057 returning 18m at 2.29% copper and 1.12g/t gold to end-of-hole, including 5m at 6.88% Cu and 3.60g/t Au, alongside 57m at 0.60% Cu. Other strong RC results included NANRCD041 with 51m at 1.03% Cu and NANRCD035 with 30m at 1.15% Cu.

The discovery of shallow, high-grade zones at the northern extent of the system is particularly meaningful for project economics, as shallower mineralisation is generally more accessible and potentially lower-cost to mine.

Sector Context and What Nanadie Represents

The Nanadie project sits within WA's Goldfields region, recognised as one of Australia's premier Mining jurisdictions with established infrastructure, a skilled local workforce and a regulatory environment that is comparatively supportive of resource development. The project's copper-gold association is attractive in a Commodity cycle where Demand for copper as a critical mineral in electrification and AI data centre power infrastructure remains a structural theme.

The scale of the mineralised system — with drill holes consistently returning intercepts of hundreds of metres — suggests Nanadie is transitioning from an early-stage discovery into a potentially significant copper-gold deposit that will require a formal resource upgrade to quantify the extensions drilling has identified.

Risks and What to Watch

Solstice is a pre-resource-upgrade exploration company, and the current Mineral Resource Estimate of 40.4Mt does not yet reflect the full extent of mineralisation identified in drilling. The next Mineral Resource update will be critical for the market's assessment of Nanadie's scale. In the meantime, the company's A$41.3 million cash position with no debt provides a substantial runway for continued drilling without near-term Capital raising pressure.

Watch for a Mineral Resource Estimate update incorporating quarter drilling results, progress on the Yarri and Ringlock gold projects, and further step-out drilling results from the northern and depth extensions.