Magnum Mining Confirms Ionic Clay Rare Earth Discovery at Azimuth

Magnum Mining Confirms Major Ionic Adsorption Clay REE Discovery at Azimuth Project

Magnum Mining and Exploration Ltd rare earth element discovery represents a significant breakthrough in the global rare earth landscape. Magnum Mining and Exploration Limited (ASX: MGU) has achieved a significant breakthrough at its Azimuth REE Project in Brazil, confirming that the Piracanjuba Prospect hosts an Ionic Adsorption Clay (IAC) rare earth element system. The desorption test results demonstrate exceptional recoveries of up to 75% Total Rare Earth Oxides (TREO) and 94% Magnetic Rare Earth Oxides (MREO) under mild leaching conditions.

The confirmation transforms Azimuth into one of the few verified IAC occurrences along the highly prospective Azimuth 125° lineament in Goiás State, Brazil. Furthermore, this positions Magnum alongside global rare earth leaders in this premium deposit class.

Outstanding Desorption Results Validate World-Class Discovery

The desorption test work, conducted by ALS Brazil, has delivered remarkable results that significantly exceed typical IAC recovery rates. Current global IAC production typically achieves around 25% recovery, while the publicly available Serra Verde IAC operation reports an estimated 24% recovery rate.

Key Desorption Highlights:

The results are particularly encouraging for Magnetic Rare Earth Oxides (MREO) and **Heavy Rare Earth Oxides (HREO)**—the most strategically important and highest-value elements in the rare earth suite. Several intercepts achieved MREO recoveries exceeding 50%, with the best reaching 94%.

Chairman Michael Davy commented: "Confirming an ion-exchangeable component within the mineralisation at the Piracanjuba Prospect is a critical technical milestone. The preferential recovery of magnetic and heavy rare earth oxides is highly encouraging, as these are the most strategically important and highest-value elements in the rare earth suite."

Understanding Ionic Adsorption Clay: The Gold Standard of REE Deposits

What Makes IAC Deposits Special?

Ionic Adsorption Clay deposits represent the premium class of rare earth mineralisation due to their unique processing characteristics and economic advantages. In IAC systems, rare earth elements are bound to clay particle surfaces through weak ionic bonds, allowing extraction using mild salt solutions at ambient temperature and pressure.

Key Advantages of IAC vs Traditional Clay-Hosted REE Deposits:

This processing advantage, combined with near-surface occurrence and low mining costs, underpins the superior economics of IAC deposits compared to hard rock alternatives.

The significance of IAC deposits extends beyond simple extraction methods. Unlike traditional rare earth deposits that require aggressive chemical processing and high-temperature treatment, IAC systems can be processed using environmentally friendly ammonium sulphate solutions. Consequently, this approach eliminates the need for expensive roasting facilities and reduces both capital expenditure and ongoing operational costs.

Expanding the Discovery: 85km² Geophysical Anomaly

The Piracanjuba discovery sits within a massive 85km² radiometric anomaly identified through airborne geophysical surveys, highlighting the potential to host a large-scale IAC system. The company has accelerated plans to map the lateral extent of the Piracanjuba North target through expanded auger drilling.

Current Exploration Status:

• 19 high-priority REE prospects identified across the Azimuth project
• Ongoing auger drilling across untested greenfield targets
• Pattern drilling planned to delineate the full extent of mineralisation
• Bulk sampling programme in development for comprehensive metallurgical testing

In addition, the discovery benefits from excellent infrastructure access, with local road networks providing easy access to prospects across the project area.

Strategic Positioning Along Brazil's Premier REE Corridor

The Azimuth REE Project covers an impressive 1,201km² across 72 granted tenements along the Azimuth 125° Lineament—a crustal-scale geological feature recognised as a major source of rare earth mineralisation. This lineament has attracted significant industry attention, with major explorers including Appia, Enova, Rainbow Rare Earths, and Fortescue Metals Group all securing strategic positions in the region.

Project Highlights:

• 100% owned by Magnum Mining
• Extends over 900km of the regional Az125° Lineament
• Located in the Goiás Alkaline Province with proven REE potential
• All permits in good standing with Brazilian mining authorities

The project's positioning near established REE deposits, including proximity to CBMM's Araxa REE deposit and Appia's PCH deposit, validates the regional prospectivity. Furthermore, this provides valuable geological context for the Magnum Mining and Exploration Ltd rare earth element discovery.

The Azimuth 125° Lineament represents a crustal-scale geological feature that cuts across the entire Brazilian continent. This trans-Brazilian structure has been associated with significant mineralisation events, particularly rare earth concentrations linked to alkaline magmatism. However, the lineament's intersection with other major geological structures creates particularly favourable conditions for REE concentration and preservation.

Metallurgical Test Work Confirms IAC Classification

The desorption test work undertaken by ALS Brazil utilised industry-standard methodology to confirm the ionic nature of the rare earth mineralisation. Samples were subjected to 0.5 Mole ammonium sulphate solution at pH4 for 20 minutes at ambient temperature—conditions specifically designed to test for ion-exchangeable REEs.

Test Work Parameters:

• Leaching Agent: 0.5M ammonium sulphate solution
• pH Level: pH4 (mild conditions)
• Temperature: Ambient room temperature
• Duration: 20-minute residence time
• Analysis: ICP-MS for full REE suite

The use of pH4 conditions represents a significant technical advantage compared to the pH2 often required for non-IAC REE mineralisation. This mild acidity delivers both economic and environmental benefits through reduced reagent costs and lower environmental impact.

Key Technical Milestone
The confirmation of ion-exchangeable REEs at Piracanjuba validates the deposit classification as a true IAC system, distinguishing it from ordinary clay-hosted REE deposits that require more intensive processing methods.

What Are the Next Steps for Development?

Magnum is recasting its budget to accelerate the full assessment of the Piracanjuba discovery, with several key initiatives planned:

Immediate Priorities:

1. Expanded auger drilling to map the Piracanjuba North anomalous area
2. Continued reconnaissance drilling across all 19 high-priority targets
3. Advanced metallurgical testing using higher pH and shorter residence times
4. Bulk sample collection for comprehensive test work programmes

Medium-term Milestones:

• Pattern drilling to define resource potential
• Resource estimation studies
• Prefeasibility assessment
• Environmental and permitting advancement

Sample processing continues at ALS Brazil with 2-4 week turnaround times, ensuring steady news flow as the exploration programme advances.

The company has indicated that further metallurgical optimisation will focus on testing higher pH levels and shorter leaching residence times. For instance, these optimisation efforts could potentially enhance the business case for any proposed operation by reducing processing costs and improving recovery efficiency.

Investment Thesis: Positioning for the Global REE Transition

Why Does the Magnum Discovery Matter for Investors?

The confirmation of IAC mineralisation at Azimuth represents a significant value inflection point for Magnum. IAC deposits command premium valuations due to their superior processing economics, environmental credentials, and strategic importance in the global transition to clean energy technologies.

Key Investment Drivers:

• Premium deposit type with superior processing economics
• Large-scale potential within 85km² geophysical anomaly
• Strategic location along proven REE corridor in mining-friendly Brazil
• High-value MREO/HREO enrichment targeting most valuable REE elements
• Exceptional early-stage results with scope for further optimisation

The Magnum Mining and Exploration Ltd rare earth element discovery positions Magnum as one of the few companies outside China with confirmed IAC mineralisation. Consequently, this provides strategic value in an increasingly supply-constrained global REE market.

Rare Earth Elements: Critical Materials for Modern Technology

Rare earth elements have become increasingly important in modern technology applications, particularly in renewable energy systems, electric vehicles, and defence technologies. The elements are classified into three main categories:

Light Rare Earth Elements (LREE): Including lanthanum, cerium, praseodymium, and neodymium
Heavy Rare Earth Elements (HREO): Including dysprosium, terbium, yttrium, and others
Magnetic Rare Earth Elements (MREO): Primarily dysprosium, neodymium, praseodymium, and terbium

The MREO and HREO categories command premium pricing due to their critical applications in permanent magnets for wind turbines, electric vehicle motors, and high-performance electronics. China currently dominates global REE production, making alternative sources like Brazil's IAC deposits strategically valuable for supply chain diversification.

Why Should Investors Follow Magnum Mining?

Magnum's confirmation of IAC mineralisation at the Azimuth project represents a transformational discovery that significantly elevates the company's position in the global rare earth landscape. The exceptional desorption results, combined with the massive exploration potential across the 85km² anomaly, provide multiple pathways for value creation.

Compelling Reasons to Track MGU:

• First-mover advantage in Brazilian IAC space outside of Serra Verde
• World-class early results exceeding typical IAC recovery rates
• Massive exploration upside across 19 high-priority targets
• Strategic timing aligned with critical mineral supply chain concerns
• Strong technical team with proven track record in complex deposits

The combination of world-class early results, massive exploration potential, and strategic positioning in mining-friendly Brazil makes Magnum Mining a compelling proposition. Furthermore, this appeals to investors seeking exposure to the critical minerals transition. The company's 100% ownership of the project provides direct exposure to any future development success without joint venture complications.

With accelerated drilling programmes and metallurgical optimisation work planned, investors should closely monitor developments as the company advances toward resource definition. The confirmation of IAC mineralisation fundamentally changes the project's risk profile and positions Magnum among the select group of companies with verified ionic clay rare earth systems outside of China.

The Magnum Mining and Exploration Ltd rare earth element discovery has positioned the company at the forefront of a critical materials revolution. However, success will ultimately depend on continued exploration success and effective project development execution.

Could Magnum Mining Be Your Gateway to the REE Revolution?

With world-class desorption results confirming Ionic Adsorption Clay mineralisation and massive exploration potential across an 85km² anomaly, Magnum Mining has positioned itself amongst the elite group of companies with verified IAC systems outside China. The exceptional recoveries of up to 94% MREO under mild processing conditions, combined with 19 high-priority targets across Brazil's premier REE corridor, present a compelling investment opportunity in the critical minerals space. To explore how Magnum's transformational discovery at the Azimuth Project could fit into your investment strategy, and to access detailed information about their accelerated exploration programme and development plans, visit www.mmel.com.au today.