GreenTech Completes 2,682m Drilling and 2,143 Sample Analysis at Munni Munni

• Phase 1 drilling program completed with 12 holes totaling 2,682 metres
• Historic core resampling replaced planned drilling, reducing costs and accelerating timeline
• 2,143 samples dispatched to ALS Global for analysis, results expected in 4-6 weeks
• QA/QC validation underway by Snowden Optiro to support JORC (2012) Mineral Resource Estimate
• Munni Munni hosts a historical 24 Mt @ 2.9 g/t 4E resource with significant growth potential

Phase 1 Drilling Wraps Up Ahead of Schedule

GreenTech Metals Limited (ASX:GRE) has announced the completion of its Phase 1 drilling program at the Munni Munni Platinum-Palladium-Copper-Nickel Project in Western Australia. The program, initially planned to include up to 20 drill holes totalling approximately 6,000 metres, was completed with 12 holes and 2,682 metres of combined Reverse Circulation and Diamond drilling. This was achieved ahead of schedule, thanks largely to the excellent preservation of historical drill core stored onsite, which allowed the company to resample mineralised sections rather than drill all new holes.

Historic Core Resampling Accelerates Validation

The availability of well-preserved historical core from 16 drill holes has been a game-changer for GreenTech’s resource validation efforts. By integrating resampling of these cores with six new infill drill holes, the company has accelerated its quality assurance and quality control (QA/QC) process while significantly reducing drilling costs. This approach not only expedites the timeline but also leverages the extensive exploration history of the Munni Munni project, which includes over 91,000 metres of drilling from 328 holes conducted between 1985 and 2002.

Towards a Modern JORC-Compliant Resource

All 2,143 samples collected during the program have been sent to ALS Global laboratories in Perth, with assay results expected within 4 to 6 weeks. These results will feed into the QA/QC validation being conducted by resource consultants Snowden Optiro. The goal is to update the historical Mineral Resource Estimate (MRE); currently reported under the outdated JORC (2004) code; to a modern JORC (2012) compliant standard. This update is anticipated to be completed in the second quarter of 2026, providing a clearer and more reliable picture of the project’s resource potential.

Strategic Importance of Munni Munni

The Munni Munni Project is recognised as one of Australia’s most significant platinum group element (PGE) intrusions, hosting a large, laterally continuous reef rich in platinum, palladium, rhodium, and gold. Historically, the project has demonstrated strong grades within the Ferguson Reef, one of the country’s largest layered PGE-bearing systems. Located on granted mining leases in the Pilbara region, the project benefits from a tier-1 mining jurisdiction and proximity to existing processing infrastructure, although GreenTech currently holds no agreements with third-party facilities.

Looking Ahead

GreenTech’s CEO James Rattenbury emphasised the significance of this milestone, noting that the accelerated program brings the company closer to unlocking the full potential of Munni Munni. With global demand for PGEs strengthening and metal prices improving, the updated resource estimate will be a critical foundation for further technical and commercial evaluation. The consolidation of the surrounding land into a contiguous 346.4 square kilometre package also positions GreenTech well for district-scale exploration and potential discovery of additional high-grade zones.

Bottom Line?

As assay results loom, GreenTech’s strategic use of historic core could redefine Munni Munni’s future value.

Questions in the middle?

• How will the updated JORC (2012) Mineral Resource Estimate compare to the historical resource?
• What are the next steps for GreenTech following the resource update in terms of project development?
• Could further consolidation or partnerships accelerate commercialisation of the Munni Munni project?