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Alien Metals Limited announced on December 17, 2025, that its proposed joint venture partner, GreenTech Metals Limited, has commenced a Phase 1 drill program at the Munni Munni Platinum-Palladium-Copper-Nickel Project in Western Australia. This program comprises up to 20 holes for approximately 6,000 meters and is anticipated to be completed in February 2026, aiming to enable a JORC (2012) compliant Mineral Resource Estimate in early 2026. Alien retains a 30% interest in the project, which hosts a historical non-compliant JORC (2004) resource of 2.2Moz PGM and gold.
| Date | 17 Dec 2025 |
| Time | 11:15:01 |
| Category | Corporate updates |
| ID | 9663L |
Trading Symbols
AIM: UFO
FWB: I3A1
17 December 2025
Alien Metals Limited
("Alien" or the "Company")
For further information, please visit the Company's website at www.alienmetals.uk or contact:
Strand Hanson (Financial and Nominated Adviser)
James Harris / James Dance / Edward Foulkes
Tel: +44 (0) 207 409 3494
Harry Ansell / Katy Mitchell Tel +44 (0) 203 829 5000
Andy Thacker / Guy McDougall
Tel: +44 (0) 203 657 0050
Charles Goodwin / Shivantha Thambirajah
Tel: +44 (0) 203 004 9512
Alien Metals Ltd is a mining exploration and development company listed on the AIM market of the London Stock Exchange (AIM: UFO). The Company follows a balanced strategy of advancing and strengthening its asset portfolio through targeted technical work and project development, while evaluating partnerships, joint ventures, and selective monetisation opportunities that are value-enhancing for shareholders. At the same time, Alien will continue to consider opportunities to expand our asset base through carefully selected acquisition opportunities which meet the Board's prudent criteria.
Alien's principal focus is the advancement and development of its 90%-owned Hancock Iron Ore Project in the central Pilbara region of Western Australia. The Hancock tenements contain a JORC-compliant resource of 8.4Mt at 60% Fe and offer significant exploration upside, which is targeted to deliver a mining operation of 2Mtpa for 10 years. The Project benefits from direct access to the Great Northern Highway, providing a route to export facilities at Port Hedland, one of the world's largest iron ore export hubs. Alien also holds exploration interests in the Brockman and Vivash iron ore projects in the West Pilbara.
Alien additionally retains exposure to two advanced precious and base metal assets in the Pilbara. At Munni Munni, one of Australia's largest PGM systems hosting a historic resource of 2.2Moz PGM (Palladium, Platinum, and Rhodium) and gold, the Company has entered into a conditional joint venture with GreenTech Metals Ltd, under which Alien will retain a 30% interest, free carried to the completion of a bankable feasibility study. Alien also retains a 30% interest in the Elizabeth Hill Silver Project through a joint venture with West Coast Silver Limited, which encompasses Elizabeth Hill Mining Lease and exploration tenements surrounding the historical silver mine, which has produced some of Australia's highest-grade silver ore during the late 1990s.
The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr Thomas Reddicliffe, a Competent Person who is a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Reddicliffe is a Technical Director of GreenTech Metals Ltd.
Mr Reddicliffe has sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves', and a Specialist under the 2015 Edition of the 'Australasian Code for Public Reporting of technical assessments and valuations of mineral assets'.
Mr Reddicliffe consents to the inclusion in the report of the matters based on his information and in the form and context in which it appears.
Appendix A - ASX: GRE ANNOUNCEMENT
Table 1: Munni Munni Historical Resources Estimate
|
CATEGORY* |
Mt |
Pt (g/t) |
Pd (g/t) |
Au (g/t) |
Rh* (g/t) |
Cu (%) |
Ni (%) |
|
Measured |
12.4 |
1.1 |
1.4 |
0.2 |
0.1 |
0.09 |
0.07 |
|
Indicated |
9.8 |
1.1 |
1.6 |
0.3 |
0.1 |
0.22 |
0.11 |
|
Inferred |
1.4 |
1.1 |
1.6 |
0.3 |
0.1 |
0.15 |
0.09 |
|
Total |
23.6 |
1.1 |
1.5 |
0.2 |
0.1 |
0.15 |
0.09 |
· The planned drill program is comprised of up to 20 holes for approximately 6,000m to provide QA/QC verification of historic resources to enable a JORC (2012) compliant MRE in early 2026, potentially expand the resource outside of the existing mineralised envelope and obtain material for metallurgical testwork.
· Higher PGE and copper prices driven by rising global demand and limited supply supports GreenTech's strategy to consolidate the Munni Munni intrusion and broader land package, including the Whundo Copper-Gold project.
· A recent site visit has confirmed excellent preservation of the stored historical core along with related laboratory sample pulps, cataloging of which is underway.
· Historical drill collars are being located and surveyed as part of the Resource QA/QC process.
GreenTech Metals Ltd (ASX: GRE) (GreenTech or the Company) is pleased to announce that the Phase 1 drill program is getting underway at the recently acquired Munni Munni Platinum-Palladium-Copper-Nickel Project, located adjacent to the Company's advanced Whundo Copper-Zinc-Gold Project in the West Pilbara region of Western Australia.
Strengthening PGE and copper prices have provided renewed interest in the Munni Munni Layered Mafic Intrusion, where previous evaluation/development was slowed by softer markets rather than geology. Improved metal prices and the consolidation of the nearby Whundo copper project which has potential to increase the scale of the combined projects, has the potential to enhance project economics and provide a clear catalyst to re-evaluate Munni Munni's established PGE-Cu-Ni endowment.
Non-Executive Chairman, Simon Kidston, commented:
"We are very pleased that our Phase 1 drill program at Munni Munni is underway, an exciting milestone for GreenTech and a key objective towards unlocking the full potential of this world-class PGE-Cu-Ni project.
"With strong global demand for PGEs, improving metal prices and district-scale consolidation achieved (subject to shareholder approval in January 2026), this program is designed to transition Munni Munni into a modern, JORC (2012) compliant resource and position the Company for the next phase of technical and commercial evaluation to create value for our shareholders."
Photo 1: Diamond Drill Rig Mobilising to Munni Munni PGE-Cu-Ni Project
Why this matters for GRE Investors:
· Munni Munni represents one of Australia's largest undeveloped PGE systems with >2Moz historical resource 4E (PGE+Au).
· Drilling is the first step toward unlocking a JORC (2012) compliant resource and future development studies.
· Consolidation with Whundo creates an emerging multi-commodity development hub in the West Pilbara.
· Positioned to leverage strengthening PGE prices and Western battery-metal infrastructure growth.
Drill Program
The Phase 1 drill program will comprise up to 20 Reverse Circulation (RC) / Diamond Drill (DD) holes for approximately 6,000m to provide QA/QC verification of the historic modelled resource sufficient to enable a classification of the MRE to JORC (2012) standard in early 2026. The drilling will also test for mineralisation outside of MRE as well as obtaining material for metallurgical testwork.
To the extent possible within the program constraints the drilling will include infill and step-out coverage across the Ferguson Reef (Figure 1), targeting both the historically defined higher-grade core within the 2002 MRE as well as extensions along strike and assess the additional shallow copper-nickel potential of the deposit.
Intervals of the diamond cored mineralisation will be selected for detailed geological, mineralogical and structural analysis. In addition, representative composite samples will be selected and prepared for metallurgical testwork.
Due to the mostly rugged nature of the terrain a small footprint track mounted drill rig has been chosen to undertake the core drilling component of the drill program (Photo 1). The drill program is anticipated to be completed in February 2026, following a short break for the holiday season, with assay results anticipated approximately 4-6 weeks after completion.
Photo 2: Establishing Drill Pad for Phase 1 Drill Program
A visit to site was recently completed to finalise preparations for the Phase 1 drilling program and to examine the historical core storage yard located on site at Munni Munni. It was pleasing to see excellent preservation of the stored historical core (Photo 3) along with related laboratory sample pulps. The cataloguing of the core is underway. The numerous ¼ and ½ core mineralised sections preserved will be of great benefit to completing the QA/QC requirements for verification of the historical resource.
 |
Photo 3: Historical sectioned and sampled Munni Munni Core
In addition, the Ferguson Reef was located and inspected (Photos 4, 5). Malachite copper staining was noted to be associated with the Websterite at some locations (Photo 6).
Photo 4: Consultant Kevin Frost and Tom Reddicliffe Locating Ferguson Reef
 |
 |
|
Photo 5: Rock Chip from Ferguson Reef, the host for PGE Mineralisation |
Photo 6: Malachite Copper Staining Associated with Ferguson Reef
|
Figure 1: Munni Munni Tenure Overlain with Magnetics
This announcement has been authorised for release by the Board of GreenTech Metals Limited.
For further information, please contact:
Thomas Reddicliffe
Executive Director
GreenTech Metals Limited
E: info@greentechmetals.com.au
About The Munni Munni PGE-Cu-Ni Project
The Munni Munni Project is one of Australia's most significant platinum group element (PGE) intrusions, hosting a large, laterally continuous reef containing platinum, palladium, rhodium and gold. The project has an extensive exploration history and several key attributes:
• Well-established PGE-Cu-Ni endowment: Historic drilling and metallurgical work have confirmed strong grades within the Ferguson Reef, one of Australia's largest layered PGE-bearing systems.
• Previous development activity: Multiple operators advanced the project through substantial drilling, testwork and resource modelling. Earlier development stalled mainly due to weaker PGE prices at the time.
• Conventional processing pathway: Historical studies indicate the mineralisation responds well to traditional flotation and concentration techniques.
• Significant growth potential: Mineralisation remains open along strike and at depth, with modern geophysics and drilling across the now-consolidated tenure expected to unlock additional high-grade zones.
• Tier-1 mining jurisdiction: Located in the Pilbara region of Western Australia on a granted mining lease, with proximity to the Radio Hill processing facility (third-party owned; GRE has no current agreement in place
The consolidation of the surrounding land into a single 346.4km² contiguous package provides a strategic opportunity for district-scale exploration. The package covers a substantial portion of the Munni Munni intrusion and associated fault systems, which are prospective for both expansion of the known PGE-Cu-Ni Reef and the discovery of additional PGE sulphide targets along parallel structural corridors.
Munni Munni Project Tenement Location