White Cliff Minerals Expands Danvers Copper System in Nunavut

Diamond Drilling Cracks Open a Major Copper System at White Cliff Minerals' Danvers Project

White Cliff Minerals Ltd (ASX: WCN | OTCQB: WCMLF) has reported an exploration update from the Rae Copper Project in Nunavut, Canada, indicating that diamond drilling is helping to expand the Danvers copper system and refine the geological model. The White Cliff Minerals Danvers copper drilling results in Nunavut Canada reveal new reverse circulation (RC) assay results, over 73 metres of visually logged copper sulphide mineralisation in the first diamond drill hole into the Teshierpi Fault Zone, and an updated view on the structures controlling high-grade copper.

According to White Cliff Minerals Ltd, these results are part of an ongoing 2026 drilling program that is testing a 12 km corridor along the Teshierpi Fault Zone and the Danvers trend.

A System That Keeps Growing: The Danvers Copper Story So Far

Historic work at Danvers outlined a non JORC-compliant historic resource estimate of 4.16 million tonnes at 2.96% Cu, reported in 1968 for the Area 47 / DOT 47 lode. White Cliff Minerals Ltd emphasises that this estimate is considered historic and not compliant with current JORC standards, but it provides useful context for the scale of the mineral system.

Modern drilling by White Cliff Minerals Ltd has been testing extensions and parallel positions around this historic work. The current RC and diamond drilling campaigns are:

• Extending the Danvers 1 footprint to the southwest
• Testing mineralisation hosted by the Teshierpi Fault Zone to the north and northeast
• Collecting oriented diamond core to define structural controls on high-grade copper zones

According to the 30 June 2026 announcement, key new results from the 2026 RC campaign at Danvers 1 include:

• DAN26020
  • 19.81 m @ 0.72% Cu from 111.25 m
  • Including 1.53 m @ 2.39% Cu from 111.25 m
  • And 3.05 m @ 1.11% Cu from 126.49 m
  • Extends Danvers 1 mineralisation 218 m to the southwest

The Company reports that the Danvers 1 mineralised footprint now spans a strike length of 1,037 m. Furthermore, several additional holes returned lower-grade copper mineralisation that help define the broader system.

Key 2026 RC assay intervals at Danvers

These RC results support the interpretation that Danvers 1 forms part of a broader copper-bearing structure that links towards discoveries on the Teshierpi Fault Zone to the northeast and southwest.

What the Diamond Drill Core Is Revealing

The maiden diamond drill hole at Danvers, DAN26025, is central to this update. It was designed as a scissor hole to RC hole DAN26012 (which previously returned 19.81 m @ 6.64% Cu, reported 10 June 2026), with the aim of:

• Testing the orientation and thickness of high-grade zones
• Observing mineralisation textures and structural features directly in core
• Identifying specific horizons that control copper distribution within the fault zone

According to White Cliff Minerals Ltd, logging of DAN26025 has recorded 73.32 m of chalcocite and chalcopyrite-bearing mineralisation between 38.60 m and 245.20 m downhole. These observations are visual only, and assays are expected in 4–6 weeks from the date of the announcement.

The drill core provides several key insights:

• Copper sulphides, mainly chalcocite with chalcopyrite, occur as the cement in crackle and mosaic breccias
• These breccias are interpreted as shoulder zones to the main Teshierpi Fault Zone
• The main fault core appears as a chaotic breccia with strong hematite alteration and more intense brecciation
• Within this package, a distinct breccia horizon has been recognised that hosts chalcocite–calcite cement in crackle and mosaic breccias along the shoulder of the main chaotic breccia

In practical terms, this means the team has isolated a specific rock unit within the broader fault zone that appears to be a preferred host for copper sulphides. Consequently, rather than treating the entire fault corridor as one broad target, follow-up drilling can focus on this horizon along strike and at depth.

"The hole has isolated a key mineralised horizon within the fault and breccia package, giving us a much clearer target for follow-up drilling along strike and at depth. Drilling will now continue to target high-grade copper zones, with the northeast extent of the fault zone still largely untested and representing a significant near-term growth opportunity," said Troy Whittaker, Managing Director of White Cliff Minerals Ltd.

According to the announcement, this new structural insight has already been incorporated into the geological model, and subsequent holes are being drilled with vectors aimed at high-grade prospective areas identified within the fault and breccia package.

Understanding Chalcocite, Bornite and Breccia-Hosted Copper

The announcement references several technical terms that are highly relevant to the Danvers system and to investors assessing copper projects.

What Are Chalcocite, Bornite and Chalcopyrite?

These are all copper sulphide minerals, each with different copper content:

• Chalcocite (Cu₂S) — contains approximately 80% copper by weight, considered one of the highest copper-grade sulphide minerals
• Bornite (Cu₅FeS₄) — contains roughly 63% copper by weight, often referred to as a high-grade copper-iron sulphide
• Chalcopyrite (CuFeS₂) — contains about 35% copper by weight, the most common copper sulphide in many deposits, but lower in copper content than chalcocite and bornite

White Cliff Minerals Ltd states that chalcocite and bornite are the dominant copper sulphides observed across mineralised zones at Rae, with chalcopyrite also present. This mineralogy is considered favourable because higher intrinsic copper content can lead to:

• Higher-grade ore at equivalent sulphide volumes
• The potential for efficient flotation and concentrate production, subject to metallurgical test work

The Company has separately reported 2026 metallurgical test work at Danvers, which returned up to 95.4% copper recovery and 93.3% silver recovery using conventional flotation, and concentrates of around 40% Cu and 150 g/t Ag, with early-stage concentrates above 28% Cu. Those test results are consistent with a chalcocite-dominated system.

What Is a Breccia and Why Does It Matter Here?

A breccia is a rock made up of broken fragments of older rock, cemented together by a finer-grained matrix or minerals. At Danvers and along the Teshierpi Fault Zone, breccias are critical because they:

• Mark zones where the rock has been fractured and broken
• Provide open spaces and permeable pathways for mineralising fluids to move through
• Can be selectively filled by copper sulphides such as chalcocite and chalcopyrite

The announcement describes different breccia textures:

• Crackle breccia — fragments are broken but still largely in place, with thin veins or films of cement between them
• Mosaic breccia — fragments are more thoroughly broken and rotated, with more abundant cement
• Chaotic breccia — fragments are highly disorganised, often associated with fault cores and intense movement

In DAN26025, chalcocite is a key part of the breccia cement, particularly in crackle and mosaic breccias on the shoulders of the main chaotic fault breccia. This pattern suggests that the structural position and permeability of the breccias control where copper sulphides are deposited.

Key Glossary from the Announcement

Drilling Pipeline and Near-Term Catalysts

According to White Cliff Minerals Ltd, the 2026 drilling program at Rae is active across several fronts, with a number of assay results still pending and further drilling planned.

Assays Pending

The announcement highlights several holes where visual logging has recorded copper sulphides and assays are awaited:

• DAN26025 (diamond drill hole) — 73.32 m of visually logged chalcocite and chalcopyrite-bearing mineralisation between 38.60 m and 245.20 m, with assays expected in 4–6 weeks
• DAN26022 and DAN26024 (RC step-outs) — large step-out holes 606 m (north) and 686 m (northeast) from Danvers 1, with both intersecting broad intervals of copper sulphides and assays pending
• DAN26023 — tested growth to the northeast of Danvers 1, with assays pending

These pending results represent key near-term data points for investors monitoring White Cliff Minerals Danvers copper drilling results in Nunavut Canada.

Ongoing and Planned Drilling

The Company outlines several ongoing activities:

1. Completion of the Phase 1 regional spaced RC campaign across 12,000 m of strike length, targeted for July 2026
2. Continued diamond drilling to infill the Phase 1 RC pattern and target the newly defined high-grade breccia horizon within the Teshierpi Fault Zone
3. Follow-up drilling across the northeast extent of the Teshierpi Fault Zone, which is described as still largely untested
4. Continued collection of oriented diamond core at Danvers 1, aimed at building a structural dataset to guide future drill orientations and target generation
5. Comparison of structural data from Danvers 1 with mineralisation identified more than 5 km to the southwest along the same fault system

Near-term catalysts from the program

The Investment Thesis: Scale, Grade and Structural Clarity

From an investor perspective, the announcement points to three main elements at Rae and Danvers.

1. Growing Mineralised Footprint

White Cliff Minerals Ltd reports that the Danvers 1 footprint now covers 1,037 m of strike following the DAN26020 southwest extension. In addition, the Teshierpi Fault Zone has high-grade intervals in several RC holes (including DAN26008, DAN26012 and DAN26015, reported previously), defining approximately 1.37 km of strike length where drill spacing is currently more than 300 m.

Regional RC drilling in 2026 has, furthermore, identified new mineralisation along the fault on a kilometre scale. This footprint remains at an exploration stage and is not yet translated into a JORC-compliant Mineral Resource Estimate. However, it defines a sizeable corridor where copper sulphides have been intersected.

2. High-Grade Copper Sulphide Mineralogy

The Company states that ongoing logging consistently identifies chalcocite and bornite as dominant copper sulphides across the project. This has several implications:

• It supports the higher grades reported in several RC intercepts
• It aligns with metallurgical test work that has delivered high copper and silver recoveries using conventional flotation
• It suggests that, if future resources and reserves are defined, the mineralogy may support conventional processing routes

This mineralogical profile distinguishes the project relative to deposits where copper is mainly hosted in lower-grade minerals such as chalcopyrite.

3. Improved Structural Understanding

The core from DAN26025 has allowed White Cliff Minerals Ltd to identify a specific mineralised breccia horizon within the broader Teshierpi Fault Zone, and to recognise that copper sulphides occur preferentially in chalcocite–calcite cemented crackle and mosaic breccias adjacent to the main chaotic fault breccia.

Consequently, the geological model has been updated so that subsequent drill holes are now targeting this defined horizon rather than a broad undifferentiated zone. This upgraded structural understanding is pertinent for capital allocation, as more accurate targeting can potentially improve hit rates for high-grade intercepts.

Why Investors Are Watching White Cliff Minerals

White Cliff Minerals Ltd is operating in a 1,228 km² tenement package in Nunavut, Canada, with a suite of copper targets including the Danvers and Hulk areas. The White Cliff Minerals Danvers copper drilling results in Nunavut Canada are characterised by a growing strike footprint, high-grade copper sulphide mineralogy dominated by chalcocite and bornite, and metallurgical test work indicating high recoveries via conventional flotation.

For investors focused on copper exposure, key monitoring points over the short term include:

• Assay outcomes from DAN26025, which has already delivered 73.32 m of visually logged copper sulphides and defined a key breccia horizon
• Results from large step-out RC holes DAN26022 and DAN26024, which may indicate whether the Danvers system extends significantly to the north and northeast
• Completion of the Phase 1 regional program and the extent to which it defines new zones along the 12 km strike corridor

"White Cliff Minerals Ltd is advancing an extensive copper system at Rae, with the Danvers 1 footprint now at 1,037 m of strike, high-grade copper intervals defined along a 1.37 km segment of the Teshierpi Fault Zone, and the maiden diamond hole DAN26025 isolating a distinct breccia-hosted horizon that will guide ongoing drilling. Pending assays from multiple holes with visually logged copper sulphides and the largely untested northeast fault extension present clear near-term data points for investors tracking the project's progress."

Want to Track White Cliff Minerals' Next Big Copper Result?

With the Danvers 1 footprint now spanning over 1,037 metres of strike, a newly defined high-grade breccia horizon within the Teshierpi Fault Zone, and multiple holes with visually logged copper sulphides awaiting assay, White Cliff Minerals Ltd (ASX: WCN | OTCQB: WCMLF) is rapidly advancing one of Canada's most compelling emerging copper systems. Investors looking to follow the project's progress, upcoming drill results, and the broader Rae Copper Project story can find the latest updates directly from the company at wcminerals.com.au.