White Cliff Doubles Danvers Copper Footprint with Thick Chalcocite Zones

Expansion of Copper Mineralisation at Danvers

White Cliff Minerals Limited (ASX:WCN) has significantly expanded the known copper mineralisation footprint at its Danvers deposit in Nunavut, Canada. Recent reverse circulation drilling has visually confirmed copper sulphides over more than 1.8 kilometres of strike within the Teshierpi Fault Zone, effectively doubling the footprint established by 2025 drilling. This strike length potentially defines a material copper system that remains open along strike and at depth, underpinning the prospectivity of the Rae Copper Project.

Key drillholes DAN26006 and DAN26008 delivered thick intervals of chalcocite-dominant mineralisation, with 37 metres and 55 metres of copper sulphides observed respectively. Notably, DAN26008 intersected the highest copper sulphide concentrations of the program to date within a previously untested, multi-kilometre scale electromagnetic (EM) conductor. This hole lies 580 metres northeast of DAN26005 and aligns with high-grade surface samples that returned up to 37.4% copper and 72.9 g/t silver, reinforcing the geological model that links feeder structures adjacent to mineralised flow tops.

Geophysical Targeting Validated by Drilling

The drilling campaign has validated the use of combined EM and magnetic geophysical data for targeting within the Teshierpi Fault Zone. The main structure is now well understood, with visible mineralisation continuity between widely spaced holes indicating a robust and well-endowed system. Further step-out drilling is underway to the northeast, testing the extent of the conductivity anomaly that hosts these mineralised zones.

These results build on earlier work at Danvers, including a 5.2 km step-out that confirmed copper sulphides over 1.3 km strike and thick intervals up to 78 metres. The current findings thus represent a meaningful extension of the district-scale mineralisation already documented at the project district-scale copper mineralisation. Assay results from the latest drilling are awaited within approximately four weeks, which will provide critical data on grades and true widths.

Operational Efficiency and Funding Position

Operationally, White Cliff’s field teams have delivered efficient logistics, enabling earlier-than-expected access to the primary geophysical anomaly. This has accelerated the understanding of the system and enhanced the overall effectiveness of the 2026 exploration program. Managing Director Troy Whittaker highlighted that the company is well funded to complete its drilling objectives, supported by a strong cash balance, prepaid drilling, proceeds from the sale of the Great Bear Project, and ongoing option conversions strong cash balance and asset sale.

Alongside the drilling, metallurgical testwork has demonstrated excellent copper recoveries exceeding 95% via conventional flotation, producing high-grade concentrates with no deleterious elements. These metallurgical results support a simplified and cost-effective processing route for the mineralisation style encountered at Danvers.

Historical Context and Next Steps

The Rae Copper Project hosts a historic resource estimate at Danvers of 4.16 million tons grading 2.96% copper, although this is not compliant with current JORC standards and requires verification. The current drilling campaign aims to expand on this foundation, with a focus on confirming continuity, delineating extensions, and advancing towards a JORC-compliant resource.

Further drilling is planned to test lateral and depth extensions of the mineralised zones, particularly along the Teshierpi Fault Zone and within the Stark-Hulk sub-basin, guided by recent geophysical surveys. The company also plans to integrate metallurgical data to refine processing assumptions and support future resource development.