White Cliff Minerals Achieves Metallurgical Breakthrough at Danvers Deposit

White Cliff Minerals has achieved a remarkable White Cliff Minerals metallurgical breakthrough at its Danvers deposit within the Rae Copper Project in Nunavut, Canada, demonstrating over 95% copper and over 93% silver recoveries through conventional processing methods. These results significantly de-risk the project's development pathway while confirming the potential for premium concentrate production.

The comprehensive testwork conducted by Sepro Laboratories validates a simple, conventional flotation flowsheet that eliminates complex processing requirements. Furthermore, with high-grade copper concentrates of approximately 40% Cu and 150g/t Ag achieved without regrinding, the results support a scalable processing solution with reduced capital and operating cost potential.

Exceptional Recovery Rates Across All Ore Types

The metallurgical programme delivered consistently strong performance across multiple composite samples, with copper recovery exceeding 90% across all tested ore grades. These outstanding results underscore the exceptional nature of the White Cliff Minerals metallurgical breakthrough.

Copper Recovery Performance:

• Peak recovery: 95.4% Cu achieved in master composite testing
• Consistent performance: Over 90% Cu recovery across all variability composites
• Robust across grades: Low, medium, and high-grade composites all exceeded 90% recovery

Silver Recovery Excellence:

• Up to 93.3% Ag recovery supporting valuable by-product credits
• Consistent silver grades: Approximately 150g/t Ag in final concentrates
• Premium concentrate quality enhances potential commercial terms

Concentrate Quality Achievements:

• Saleable grades achieved early: Over 28% Cu concentrate produced in second cleaner stage
• No third cleaner required: Simplified flowsheet reduces processing complexity
• Clean concentrate profile: No significant deleterious elements identified

Understanding Flotation Processing in Copper Extraction

Flotation processing represents the industry-standard method for concentrating copper minerals from ore. The process involves introducing air bubbles into a slurry mixture, where specific chemicals (collectors and frothers) cause target copper minerals to attach to bubbles and float to the surface for collection.

Key Process Advantages:

Proven Technology: Flotation has been successfully used in copper processing for over a century, reducing technical and operational risk compared to experimental processing methods. Consequently, this established approach provides significant confidence in project development outcomes.

Cost Effectiveness: Well-established equipment designs and operating procedures minimise capital requirements and operational complexity compared to alternative concentration methods. Additionally, operational teams worldwide possess extensive experience with conventional flotation systems.

Scalability: Conventional flotation plants can be designed for various production scales, from small operations to world-class facilities, providing flexibility for project development. However, this scalability ensures that projects can adapt to market conditions and resource expansion.

The exceptional response of Danvers mineralisation to standard flotation methods eliminates the need for expensive, complex processing technologies often required for difficult ores, potentially reducing both capital expenditure and operational costs.

Simplified Processing Flowsheet Reduces Development Risk

The metallurgical testwork confirmed several processing advantages that could translate to improved project economics and reduced technical risk. In addition, these advantages represent a key component of the White Cliff Minerals metallurgical breakthrough.

Processing Benefits:

• No regrinding required: Tests conducted both with and without regrind achieved similar final concentrate grades
• Reduced cleaning stages: Saleable concentrates achieved in second cleaner stage, eliminating third-stage requirements
• Conventional reagent suite: Standard flotation chemicals (SIPX, Aerophine 3418A, MIBC) proved effective
• Natural pH operation: No pH adjustment required, reducing reagent costs and operational complexity

Mineralogy Advantages:

• Favourable copper speciation: 78.1-88.6% secondary sulphide minerals with chalcocite-bornite dominance
• Low oxide content: Only 3.0-9.5% oxide copper, ideal for conventional flotation processing
• Clean mineral assemblage: Minimal deleterious elements support premium concentrate commercial terms

The dominance of chalcocite-bornite mineralisation at Danvers creates favourable conditions for copper recovery, as these minerals are among the most responsive to conventional flotation methods, according to the testwork results.

These outstanding metallurgical results significantly enhance the project's development credentials and underscore its potential to deliver a high-value copper product. The dominance of high-grade chalcocite-bornite mineralisation highlights the opportunity for the production of a premium, clean concentrate via conventional, low-risk processing methods, with minimal deleterious or penalty elements, said Troy Whittaker, Managing Director.

Strategic Timing with Expanded Exploration Programme

The White Cliff Minerals metallurgical breakthrough coincides with White Cliff's aggressive exploration strategy targeting the Teshierpi Fault Zone. Furthermore, the company has identified a 3.75km gap between existing drillholes that hosts several high-conductance geophysical features within this major structural corridor.

2026 Exploration Objectives:

• Phase I drilling programme to test high-priority geophysical targets
• Chalcocite-dominant vein and breccia system exploration along the fault zone
• Resource expansion potential targeting increased mineralisation scale and quality
• Systematic testing of the highly prospective structural corridor

The combination of proven metallurgical performance and significant exploration potential positions Danvers as a compelling development opportunity within an increasingly attractive copper market environment.

How Will Exploration Complement Metallurgical Success?

The successful metallurgical testwork provides a foundation for valuing any future discoveries within the Teshierpi Fault Zone. Moreover, investors can now assess exploration results with confidence in processing outcomes, reducing uncertainty around potential resource expansion.

Investment Implications: De-Risked Development with Expansion Potential

White Cliff Minerals' metallurgical breakthrough addresses a critical technical risk in mineral project development—processing complexity and recovery performance. Consequently, the results demonstrate several key advantages for potential project development.

Development Risk Reduction:

• Conventional processing eliminates technology risk and reduces capital requirements
• High recovery rates maximise resource utilisation and project economics
• Premium concentrates support favourable commercial terms with potential smelters
• Simplified flowsheet reduces both capital and operating cost estimates

Exploration Value Drivers:

• Proven geological model supports systematic expansion drilling programmes
• Major fault zone setting provides additional discovery potential beyond current resources
• Historic resource foundation of 4.16 million tons at 2.96% Cu provides development baseline
• Multiple target types within the same project area offer diversified exploration upside

Market Positioning:

• Canadian jurisdiction provides established mining regulatory environment
• Copper market fundamentals supporting premium project valuations
• Proven deposit type with established global analogues in major copper districts

The convergence of excellent metallurgy, significant exploration potential, and strengthening copper market conditions creates a compelling proposition for investors seeking copper exposure through development-stage projects.

What Makes This Breakthrough Unique in Today's Market?

The timing of this metallurgical success aligns with tightening global copper supply and increasing demand from renewable energy infrastructure. In addition, conventional processing capabilities become increasingly valuable as investors seek lower-risk development pathways in uncertain economic conditions.

Key Considerations for Copper Investors

White Cliff Minerals has successfully addressed a major project development hurdle whilst positioning for potential resource expansion through systematic exploration. However, the company's approach to proving both metallurgical performance and geological continuity demonstrates technical execution quality valued by institutional investors.

Investment Tracking Points:

• Proven processing pathway eliminates major project development risk
• Active drilling programme targeting significant resource expansion along the Teshierpi Fault Zone
• Premium asset quality in an established mining jurisdiction
• Experienced management executing systematic development strategy
• Copper market exposure during a period of supply constraints and growing demand

With upcoming drilling results expected from the expanded Teshierpi Fault Zone programme and the metallurgical foundation now established, White Cliff Minerals offers investors leveraged exposure to copper discovery success with reduced processing risk.

The company's systematic approach to de-risking key development hurdles whilst advancing aggressive exploration programmes positions the project for potential value creation through both resource expansion and development pathway validation. Furthermore, this comprehensive strategy exemplifies how the White Cliff Minerals metallurgical breakthrough serves as a catalyst for broader project advancement opportunities.

Considering White Cliff Minerals for Your Copper Investment Portfolio?

White Cliff Minerals' exceptional metallurgical results at the Danvers deposit represent a significant de-risking milestone for the Rae Copper Project, demonstrating over 95% copper recovery through conventional processing methods. With an aggressive exploration programme targeting the highly prospective Teshierpi Fault Zone and proven processing capabilities now established, the company offers investors compelling exposure to both development certainty and exploration upside in Canada's established mining jurisdiction. To explore White Cliff Minerals' complete project portfolio, management strategy, and upcoming drilling programmes in detail, visit wcminerals.com.au for comprehensive investor information and the latest project developments.