GreenTech Metals has consolidated a dominant West Pilbara position by acquiring 70% of the Munni Munni PGE-Cu-Ni Project and completed a cost-saving Phase 1 drilling and historic core resampling program. Early data hints at significant resource expansion ahead of a JORC 2012 upgrade.
- 70% acquisition of Munni Munni Project expands West Pilbara landholding to over 500km²
- Phase 1 drilling and historic core resampling completed, saving drilling costs
- Historical data review reveals under-recognised copper and nickel zones beyond PGE reefs
- Assay results expected in Q2 2026 to support JORC 2012 Mineral Resource Estimate update
- CEO James Rattenbury appointed; board transitions completed
Transformational Munni Munni Acquisition Boosts GreenTech's West Pilbara Footprint
GreenTech Metals Ltd (ASX:GRE) has taken a decisive step in the West Pilbara mining hub by completing the acquisition of a 70% stake, with potential to increase to 80%, in the Munni Munni PGE-Cu-Ni Project. This move consolidates its land package to over 500 square kilometres, including tenure across the entire 13-kilometre strike of the high-grade Ferguson Reef. The acquisition, finalised in February 2026, positions GreenTech as a dominant player in a district historically underexplored despite its rich platinum group elements (PGE) and base metals endowment.
The Munni Munni Project hosts a historically significant mineral resource estimate of 23.6 million tonnes at 2.9 grams per tonne 4E (platinum, palladium, rhodium, and gold), containing approximately 2.2 million ounces, though this estimate dates back to 2002 and is not compliant with the JORC Code (2012). GreenTech is actively working to modernise this resource base.
Phase 1 Drilling and Historic Core Resampling Accelerate Resource Validation
All 2,199 samples from this combined drilling and resampling effort have been sent to ALS Global laboratories in Perth, with assay results anticipated in the June quarter. Snowden Optiro, a respected resource consultancy, is conducting the QA/QC validation to underpin a JORC 2012-compliant Mineral Resource Estimate update. The approach reflects a pragmatic balance between utilising existing data and targeted new drilling.
This efficient validation program builds on GreenTech’s earlier announcement of accelerated historic core resampling, which highlighted the company’s ability to fast-track resource confirmation while controlling costs.
Historic Data Review Uncovers Material Upside Potential
Beyond validating the historical resource, GreenTech’s ongoing systematic review of nearly 400 drill holes and detailed drill log interrogation has revealed promising new exploration avenues. Notably, the review identified multiple Ferguson Reef zones with PGE grades exceeding 4g/t 4E, indicating potential for reef thickening and higher-grade extensions.
More intriguingly, copper and nickel mineralisation appears more widespread than previously recognised. Historic resource estimates only accounted for Cu and Ni within high-grade PGE reef domains, but GreenTech’s data suggests significant sulphide mineralisation outside these zones, particularly in gabbro hanging-wall units. These eastern zones exhibit a shallow plunge from surface, potentially amenable to bulk open-cut mining, which could materially enhance project economics.
These findings support an expanded resource re-estimation, with assay results from the recent drill and resampling program expected to provide critical confirmation in the coming months.
Whundo Project Drilling Confirms Continuity Between Prospects
Meanwhile, GreenTech’s adjacent Whundo copper-zinc-gold project saw a 575-metre drill hole completed in March 2026 to test continuity between the Austin and Shelby mineralised shoots. Supported by a $140,000 Exploration Incentive Scheme grant, the drilling confirmed mineralisation and was followed by a downhole electromagnetic survey that detected wider-than-expected mineralised shoots. Assay results from this hole are due in May, potentially adding to the company’s resource growth narrative.
Leadership Changes and Financial Position
On the corporate front, James Rattenbury took the helm as CEO in March 2026, bringing 18 years of combined geological and mining finance experience, including a stint at Resource Capital Funds. His appointment signals a strategic push to unlock Munni Munni’s value. Concurrently, Executive Director Thomas Reddicliffe transitioned to a non-executive technical consultant role, while Non-Executive Director Jozsef Patarica stepped down.
Financially, GreenTech reported $1.7 million in exploration expenditure during the quarter, including $668,000 related to the Munni Munni acquisition. The company ended the period with $2.4 million in cash, providing just over one quarter of funding at current expenditure levels, underscoring the need for ongoing capital management.
GreenTech’s consolidation of the West Pilbara’s premier PGE and base metals assets, combined with its efficient exploration strategy and leadership refresh, sets the stage for a potentially transformative resource update. The market will be watching closely for the assay results due in the June quarter, which will be pivotal in validating the substantial upside hinted at by the historic data review and Phase 1 drilling.
Bottom Line?
GreenTech’s strategic acquisition and cost-effective exploration at Munni Munni position it for a significant resource upgrade, but assay results and funding will be critical near-term milestones.
Questions in the middle?
- Will assay results confirm the expanded high-grade PGE and base metal zones suggested by historic data?
- How will GreenTech manage funding needs given its current cash runway and exploration expenditure?
- What impact will the leadership changes have on the pace and focus of project development?