Power Minerals Hits 91m at 7.7% TREO From Surface at Morro do Ferro
Key Takeaways
- Hole MFSR-055 at Morro do Ferro returned 91m at 7.7% TREO and 1.4% MREO from surface, the highest whole-hole TREO grade of the six holes reported so far.
- Two higher-grade zones sit inside the intercept: 62m at 11.1% TREO and 23.1m at 17.5% TREO from 13m, including a 2m sample at 22.6% TREO, the second-highest at the project.
- All six reported holes (MFSR-051 to MFSR-056) delivered wide, high-grade intersections from surface, with whole-hole TREO ranging from 4.15% to 7.72%.
- A maiden JORC resource estimate has not yet been published, and assays for MFSR-053 to MFSR-068 are still pending at SGS Geosol.
- The non-binding Salta Lithium JV with Summit Explore has been terminated, leaving Power assessing other options for the Argentine asset.
Power Minerals reports 91m at 7.7% TREO from surface in MFSR-055 at Morro do Ferro
A single drill hole in Brazil has returned rare earth grades from the surface that few early-stage projects can match. Power Minerals (ASX: PNN) reported rare earth drilling results from hole MFSR-055 at its Morro do Ferro Project, with 91m at 7.7% TREO (total rare earth oxides) and 1.4% MREO (magnet rare earth oxides) from surface.
Two higher-grade zones sit inside that interval. The first is 62m at 11.1% TREO with 2.0% MREO from surface, and the second is 23.1m at 17.5% TREO with 3.2% MREO from 13m.
All six holes reported to date (MFSR-051 to MFSR-056) returned wide, high-grade intersections from surface, according to the company. For investors, that repeated pattern is what supports the shallow, high-grade case for the project.
Alistair Stephens, Chief Executive Officer
“These latest results reinforce the high-grade rare earth mineralisation at Morro do Ferro, with MFSR-055 returning 91 metres at 7.7% TREO and 1.4% MREO from surface…”
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Why does the MFSR-055 result matter for the resource?
A second-highest sample and a deeper footprint
Within the hole, 2m at 22.6% TREO (4.32% MREO) from 25m (sample MFP-497) is the second-highest individual sample TREO at Morro do Ferro. Sample MFP-494, at 2m at 22.4% TREO (4.6% MREO) from 19m, is the third highest.
The current highest sample is 1156 from MFSR-44, at 2m at 24.13% TREO from 14m. The announcement references an ASX release of 5 March 2026 for that result.
The company also said mineralisation was extended at depth in MFSR-055. It described the result as supporting its Exploration Target model, indicating that mineralisation continues at depth and extends to the southeast.
Continuity between sections
MFSR-055 was drilled between section lines to confirm that high-grade mineralisation continues from one section to the next. Power said the hole helps support the calculation of a maiden JORC resource estimate at the project.
That estimate has not yet been published. For now, the data is exploration-stage evidence feeding into a future calculation, not a resource figure.
Results across the program
The table below shows the headline whole-hole intervals for the six holes reported to date, as presented in the announcement.
| Hole | Interval (downhole) | Width (m) | TREO % | MREO % |
|---|---|---|---|---|
| MFSR-056 | 0 – 119m (from surface) | 119 | 4.94 | 0.89 |
| MFSR-055 | 0 – 91m (from surface) | 91 | 7.72 | 1.39 |
| MFSR-054 | 0 – 88m (from surface) | 88 | 6.33 | 1.19 |
| MFSR-053 | 0 – 119.3m (from surface) | 108.55 | 4.15 | 0.82 |
| MFSR-052 | 0 – 137m (from surface) | 137 | 4.31 | 0.73 |
| MFSR-051 | 0 – 116m (from surface) | 116 | 4.78 | 0.78 |
Widths are downhole weighted averages of all samples across the reported length, with no cut-off unless stated, and may not represent true values. MFSR-055 carries the highest whole-hole TREO grade of the six in this table.
What do TREO and MREO mean?
TREO is the combined total of the rare earth oxides measured in a sample. MREO is the subset tied to permanent magnets, made up of neodymium, praseodymium, terbium and dysprosium oxides.
A higher MREO share means more of the contained rare earth content sits in those magnet elements. Remember that these are exploration-stage grades, reported as downhole weighted averages rather than true widths.
Secondary details from the announcement include:
- MFSR-055 reached a total depth of 153.7m using HQ triple-tube diamond core, with 79 half-core samples assayed by SGS Geosol.
- Current geological analysis indicates a potential link between rare earth carbonate mineralisation and a hydrothermal system, with further drilling and geological analyses planned to define its extent and geometry.
- A 2.27m magnetite dyke at 3.2m assayed 4,143 ppm TREO.
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What’s next for Power Minerals?
Results for the lower and upper parts of MFSR-055 and the lower part of MFSR-054 remain pending. Drilling is ongoing, with results to be released progressively as they become available. Samples from MFSR-053 to MFSR-068 have been dispatched to SGS Geosol, and the company is awaiting results.
Previously released MFSR-054 results include 88m at 6.33% TREO from surface, plus a new high-grade zone of 5m at 4.32% TREO from 181m. The CEO also noted that harvesting of the eucalyptus plantation is opening up further access for drilling.
Separately, Power said the parties have agreed not to proceed with the non-binding Joint Venture with Summit Explore Corporation, a wholly-owned subsidiary of Summit Nanotech Corporation, for the Salta Lithium Project in Argentina. It has been terminated, and Power is assessing other options for development at Salta.
Ready To Learn More About Power Minerals’ Morro Do Ferro Project?
Hole MFSR-055 returned 91m at 7.7% TREO from surface, with all six reported holes delivering wide, high-grade intersections. With drilling ongoing and a maiden JORC resource estimate in view, Morro do Ferro is a rare earths story worth following.
Visit the Power Minerals (ASX: PNN) company page to explore the latest announcements, drilling updates and project details. Stay informed as further results are released.