Power Minerals Ltd
Power Minerals Targets Premium Magnet Rare Earth Profile at Morro do Ferro with Standout Nd-Pr-Dy-Tb Grades
Power Minerals Limited (ASX: PNN) has reported that a priority mineralogical characterisation program is underway at its Morro do Ferro (MDF) rare earth project in Minas Gerais, Brazil. The work is focused on whether the deposit can support a higher-value magnet rare earth product rich in neodymium (Nd), praseodymium (Pr), dysprosium (Dy) and terbium (Tb). Early mineralogical work indicates that MDF contains separate rare earth mineral phases, which may allow lower-value cerium to be reduced during mining or beneficiation.
That matters because rare earth projects are often judged not just by total rare earth oxide content, but by how much of that inventory sits in the magnet rare earths used in permanent magnets. Power reported that around 40% of the non-cerium rare earth inventory by mass comprises Nd, Pr, Tb, Dy and holmium (Ho). Furthermore, Nd, Pr, Dy and Tb account for about 98% of the contained rare earth value within the non-cerium inventory, based on Project Blue February 2026 pricing.
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Why Does the Mineralogy Matter at Morro do Ferro?
The mineralogical program is testing a simple but commercially important question: can MDF preferentially produce the rare earths that attract the most value while reducing low-value cerium early in the process?
According to Power, previous studies by the Laboratory for Technological Characterisation at the Polytechnic School of the University of São Paulo identified two distinct rare earth mineral species at Morro do Ferro:
- Bastnäsite, which is associated with high-value magnet rare earths
- Cerianite-(Ce), which hosts a significant proportion of lower-value cerium
This distinction is central to the investment case outlined in the report. If future studies confirm that cerium-rich material can be selectively avoided during mine planning or rejected during beneficiation, the project may be able to feed a more valuable concentrate into downstream processing.
In practical terms, that could mean:
- Lower reagent use
- A simpler process flowsheet
- A smaller downstream processing circuit
- Reduced residue and water treatment requirements
- Potentially lower development capital intensity
"At Morro do Ferro, we are excited about the immense potential in strategically recovering the rare-earth elements that are most essential for the permanent magnet markets. By focusing on this approach, we aim to minimise the extraction of lower-value cerium and radioactive minerals," said Mena Habib, Managing Director of Power Minerals.
High Grades in Magnet Rare Earths Stand Out in the Drilling Database
The ASX announcement highlighted assay analysis from the existing Morro do Ferro drilling database using a greater than 0.5% TREO cut-off across 1,424 diamond core samples. TREO means Total Rare Earth Oxides, or the combined amount of all measured rare earth oxides in a sample.
Power reported average grades of:
- 4,521 ppm combined Nd₂O₃ + Pr₆O₁₁
- 141 ppm Dy₂O₃
- 31 ppm Tb₄O₇
Peak grades were also material. According to the company, the data includes values of more than:
- 3.0% combined Nd₂O₃ + Pr₆O₁₁
- 250 ppm Tb₄O₇
- 1,024 ppm Dy₂O₃
Highest Dysprosium and Terbium Oxide Assays
The highest dysprosium and terbium oxide assays reported were as follows:
| Drillhole | Interval (m) | TREO (%) | Dy₂O₃ (ppm) | Tb₄O₇ (ppm) | Dy+Tb oxide (ppm) |
|---|---|---|---|---|---|
| MFSR-43 | 85–87 | 8.60 | 1,023.6 | 224.7 | 1,248.3 |
| MFSR-20 | 18–20 | 14.38 | 936.2 | 222.9 | 1,159.1 |
| MFSR-47 | 9–11 | 12.22 | 834.7 | 249.9 | 1,082.5 |
Highest Combined Neodymium and Praseodymium Intervals
The highest combined neodymium and praseodymium intervals were equally strong:
| Drillhole | Interval (m) | TREO (%) | Nd₂O₃ (ppm) | Pr₆O₁₁ (ppm) | NdPr (ppm) | NdPr (% whole rock) |
|---|---|---|---|---|---|---|
| MFSR-47 | 9.0–11.0 | 12.22 | 25,600 | 8,150 | 33,750 | 3.38 |
| MFSR-35 | 44.0–46.0 | 17.76 | 23,700 | 8,830 | 32,530 | 3.25 |
| MFSR-35 | 38.0–40.0 | 16.99 | 22,500 | 8,380 | 30,880 | 3.09 |
| MFSR-10 | 31.95–33.95 | 14.82 | 23,500 | 7,100 | 30,600 | 3.06 |
| MFSR-32 | 12.0–14.0 | 16.24 | 21,500 | 8,180 | 29,680 | 2.97 |
For investors, these results are relevant because Nd and Pr are the main ingredients in high-performance permanent magnets. Dy and Tb, however, are added where magnets need to maintain performance at higher temperatures.
Why Do Nd, Pr, Dy and Tb Matter More Than Total TREO?
Rare earth investing can be misleading if attention stays only on TREO grade. A deposit can have a high total rare earth number but still carry lower economic quality if much of that material is made up of low-value elements such as cerium.
A more useful measure is often MREO, or Magnet Rare Earth Oxides, which Power defines as:
- Nd₂O₃
- Pr₆O₁₁
- Tb₄O₇
- Dy₂O₃
These are the rare earths most closely tied to permanent magnet demand in electric vehicles, wind turbines, robotics, advanced manufacturing and some defence applications.
Bastnäsite is important here because it is one of the main commercial rare earth minerals mined globally. At Morro do Ferro, the presentation suggests that bastnäsite-rich mineralisation hosts much of the higher-value rare earth content, while cerianite-(Ce) carries a significant share of cerium separately.
If that separation proves workable during mining or beneficiation, the project may be able to improve concentrate quality before entering the more expensive chemical processing stages. Some key terms from the announcement are worth clarifying:
| Term | Meaning |
|---|---|
| TREO | Total Rare Earth Oxides, the total of all measured rare earth oxides in a sample |
| MREO | Magnet Rare Earth Oxides, specifically Nd, Pr, Tb and Dy oxides |
| Beneficiation | Early-stage physical processing used to increase the proportion of valuable minerals before chemical treatment |
| Bastnäsite | A rare earth mineral that can host valuable magnet rare earths |
| Cerianite-(Ce) | A cerium-rich mineral phase identified at MDF |
| HREO | Heavy Rare Earth Oxides, a group that includes Dy, Tb, Ho, Y and others |
This is why Power stated in the announcement that future project evaluation should place greater emphasis on magnet rare earth oxide grades per tonne and rejection of cerium, rather than total TREO alone.
Rare Earth Distribution Highlights a Skew Toward Value, Not Just Volume
The company also provided average rare earth oxide distribution data for all diamond core samples above the 0.5% TREO cut-off, excluding cerium:
| Rare earth oxide | Average grade (ppm) | Distribution (%) | Grouped (%) | Price (US$/kg) |
|---|---|---|---|---|
| La₂O₃ | 6,504 | 51.6 | 51.6 | 0.63 |
| Nd₂O₃ | 3,328 | 26.4 | 124 | |
| Pr₆O₁₁ | 1,197 | 9.5 | 35.9 | 124 |
| Sm₂O₃ | 359 | 2.9 | 2.16 | |
| Eu₂O₃ | 90 | 0.7 | 5.4 | 25.36 |
| Gd₂O₃ | 230 | 1.8 | 31.97 | |
| Tb₄O₇ | 31 | 0.2 | 903 | |
| Dy₂O₃ | 140 | 1.1 | 1.3 | 209 |
| Ho₂O₃ | 24 | 0.2 | 0.2 | 79.28 |
| Y₂O₃ | 557 | 4.4 | 4.4 | 10.01 |
| Other | 133 | 1.1 | 1.1 | — |
| Total | 12,594 | 100.0 | 100.0 | — |
Source: Project Blue February prices for rare earths in Critical Minerals Monthly March 2026, as cited in the ASX announcement.
The table shows a key feature of rare earth economics. By mass, Dy and Tb are small components, but by pricing they can have an outsized effect on value. Nd and Pr also contribute a large share of value because they sit at the centre of permanent magnet demand.
Development Implications: From Mine Planning to Permitting
Beyond grade, the mineralogical program may influence how Morro do Ferro is developed. In the announcement, Power said confirmation of current mineralogical distributions could support mine design and scheduling that avoids cerium-rich zones and removes some cerium-bearing or radioactive minerals before chemical processing.
That could have implications across several workstreams:
- Mine planning through selective extraction of more valuable zones
- Metallurgy through a simpler flowsheet and better feed material
- Capital costs through smaller downstream circuits
- Environmental studies through earlier understanding of radionuclide host minerals
- Approvals through data that supports environmental and radiation management studies
"MDF is demonstrating the characteristics of a premium magnet rare-earth project, with mineralogical studies highlighting strong exposure to the high-value magnet rare earths Nd, Pr, Dy and Tb and the potential to reduce low-value cerium through mine planning and beneficiation," said Alistair Stephens, Chief Executive Officer of Power Minerals.
The company also noted that environmental studies are commencing. The project sits on a Manifesto de Mina mining licence, ANM 005.444/1946, which provides surface land rights and mineral mining rights with no expiry date, provided appropriate taxes are paid. Power stated that the licence requires environmental approval for mining activities, and that the project area is covered by a eucalyptus plantation with no natural vegetation over the MDF project area.
Near-Term Catalysts at Morro do Ferro
According to the update, Power's maiden diamond drilling program at MDF is underway, with initial assays expected in July 2026. The company said the drilling is intended to improve geological and mineralogical understanding, expand geochemical coverage, and provide additional material for future mineralogical and metallurgical work.
The main near-term workstreams outlined in the report are as follows:
| Program | Status | Expected contribution |
|---|---|---|
| Mineralogical characterisation | Underway | Confirmation of host minerals and cerium reduction pathways |
| Maiden diamond drilling | Underway | Initial assays expected in July 2026 |
| Environmental studies | Commencing | Support environmental and radiation-related studies |
| Resource work | Future | Support future resource estimation efforts |
| Metallurgical studies | Future | Assess beneficiation and processing options |
These steps are important because rare earth projects usually require alignment across geology, metallurgy, environmental planning and marketability before value can be assigned with higher confidence.
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Why Are Investors Watching the Magnet Rare Earth Angle?
The central theme from the ASX announcement is that Morro do Ferro is being assessed not simply as a bulk rare earth deposit, but as a possible magnet rare earth-focused development. That distinction matters in a sector where the mix of rare earth elements can have a major effect on product quality, process complexity and project economics.
The current data set suggests several points investors are likely to focus on:
- Strong Nd-Pr grades, with average combined grades of 4,521 ppm
- Material Dy and Tb exposure, including peak grades of 1,024 ppm Dy₂O₃ and 250 ppm Tb₄O₇
- Separate mineral phases, which may allow lower-value cerium reduction if confirmed by ongoing work
- Upcoming assay newsflow from the current drilling campaign
- A permitting position that the company says simplifies the path to mining activities once environmental approval is in place
The next stage will be whether ongoing mineralogical, drilling and future metallurgical work confirms the early interpretation. If it does, Morro do Ferro may increasingly be assessed on magnet rare earth content, concentration potential and process simplicity, rather than on total rare earth tonnage alone.
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