White Cliff Minerals (ASX: WCN) defines 1.5 kilometre copper footprint as Rae drilling expands system scale

Troy Whittaker, Managing Director of White Cliff Minerals, spoke to MarketOpen to expand on early assay results from the 2026 drilling program at the Rae Copper Project in Nunavut, Canada and what they indicate about evolving scale and continuity at Danvers.

He outlined that initial results have confirmed a 1.5 kilometre copper mineralised footprint within the current drilling area, with visible copper sulphides recorded across 2.6 kilometres of drilling along the Teshierpi Fault Zone. When combined with earlier Danvers 1 drilling, the broader mineralised system now extends beyond 5.4 kilometres, reflecting a materially larger footprint than previously defined.

He also noted that every hole drilled into the main structure has intersected copper sulphides, while reiterating that laboratory assays remain the key determinant of grade continuity and economic interpretation.

The degree to which this program has altered your view of scale and continuity, and whether remaining uncertainty has been materially reduced or simply displaced.

Scale has clearly re rated through the 2026 drilling program, with assay results confirming a 1.5 kilometre copper mineralised footprint and sulphide mineralisation observed across a broader 2.6 kilometre drilled corridor along the Teshierpi Fault Zone. When combined with earlier drilling, the system now extends beyond 5.4 kilometres, indicating a materially larger mineralised framework than previously understood.

Continuity is supported by the fact that every hole completed into the main structure has returned copper sulphides, with mineralisation observed consistently along strike and indications of strengthening development toward the north east and into untested conductivity and sedimentary related structures.

At this stage, uncertainty has not been removed but redistributed into questions of geometry, grade distribution and depth persistence. This reflects the early stage nature of the dataset, where assay coverage remains incomplete and drill spacing is still broad, requiring further work to resolve internal structural controls.

Allocation of capital across step out, infill, and diamond drilling, including the framework used to prioritise between expansion and definition.

Capital is being deployed across step out, infill and diamond drilling within a single programme, with three rigs turning, designed to extend strike and progressively improve geological resolution along the Teshierpi Fault Zone and into sedimentary structures to the north.

The current drilling strategy is centred on systematic step outs along the structure, targeting both geophysical conductors and extensions of the mineralised corridor, including the 1.5 kilometre strike zone defined in the latest results and the broader 2.6 kilometre drilled area.

The program has now been expanded to approximately 8000 metres of drilling along the fault zone, complemented by additional expansion drilling toward the north east of Danvers 1, reinforcing a deliberate emphasis on scale definition prior to tightening drill spacing.

Diamond drilling will commence shortly and is intended to lift geological confidence through core based interpretation, improving understanding of sulphide distribution and structural controls while informing both ongoing step out targeting and future infill design.

Following the WCNO underwriting, the company is now fully funded for a 2 to 3 rig campaign through to the end of the year, providing flexibility to maintain program momentum across both expansion and definition phases. The capital framework remains weighted toward growth while the system is open, with progression toward tighter definition contingent on demonstrated continuity from assays.

Evidence required to validate grade continuity beyond sulphide occurrence, and the principal risks associated with early visual interpretation.

Demonstrating grade continuity requires consistent laboratory assay results across multiple drillholes and intervals, showing repeatable copper grades rather than isolated intercepts or visually inferred mineralisation. The key requirement is reproducibility across the 1.5 kilometre footprint and coherent distribution within the broader structural corridor.

The principal risk remains reliance on sulphide abundance as a proxy for grade. While visual logging confirms a mineralised system, it does not determine copper tenor or variability in distribution. In reverse circulation drilling, chip representation and the absence of core scale control further limit early interpretation.

Only assay data can confirm whether observed mineralisation translates into consistent grade continuity across the system.

Preconditions that would justify a transition from exploration success into formal resource definition, and the key constraint currently governing that transition.

A transition toward formal resource definition would require consistent assay confirmation of copper mineralisation across the 1.5 kilometre footprint, supported by repeatable intervals between drillholes and integration into a structurally coherent model informed by diamond drilling.

Diamond core will provide the geological framework required to refine interpretation, confirm continuity at depth and improve resolution of mineralisation distribution within the Teshierpi Fault Zone. Infill drilling would then progressively reduce spacing across the broader drilled corridor to test consistency at higher resolution.

The key constraint remains dataset maturity. Assay coverage is still partial, drilling remains widely spaced and structural interpretation is incomplete. Until these elements converge, formal resource definition remains premature.

From early scale to expanding geological reach

The focus now shifts to converting early scale indicators into a more resolved geological and grade framework through continued reverse circulation drilling and the commencement of diamond drilling at Danvers.

Assay results from the 2026 program will be the key determinant of continuity across the defined footprint and will directly guide the next phase of drilling density. Diamond drilling will provide the structural control required to refine interpretation within the Teshierpi Fault Zone and into adjacent sedimentary structures.

Following the WCNO underwriting, White Cliff Minerals is fully funded for a 2 to 3 rig campaign through to the end of the year, allowing sustained momentum as the system is progressively tested and refined. The program remains open, with disciplined capital allocation focused on reducing uncertainty while maintaining scale optionality.

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