Oceana Metals Drills Into Top-Tier Rare Earths Grades Targeting Maiden Resource
Key Takeaways
- Oceana Metals has commenced its maiden 20,000m diamond drilling program at Serra Negra, the first drilling specifically targeting rare earth elements at the project in over a decade.
- Two rigs are deployed in the priority 1.5km x 1.5km central corridor, anchored by historic intercepts of 50m @ 4.0% TREO and 22m @ 4.7% TREO sitting 300m apart — the infill gap the program is designed to close.
- Serra Negra sits within a 10km-wide carbonatite complex, three times larger than the nearby Araxá complex, which hosts the world's largest niobium deposit and significant rare earth deposits.
- First assay results from Oceana-led drilling are expected in early Q4 2026, with a maiden JORC Mineral Resource Estimate targeted in the coming months.
- The company enters the drilling campaign with approximately A$8.16m cash at 30 June 2026 plus a further A$12.6m received from Tranche 2 of its Placement in July 2026.
Drilling begins at Serra Negra as Oceana targets maiden rare earths resource
Oceana Metals (ASX: OCN) has commenced its maiden 20,000m diamond drilling program at its Serra Negra Rare Earths Project in Minas Gerais, Brazil. This is the first drilling program specifically targeting rare earth elements at Serra Negra and the first drilling at the project in over a decade. Two rigs are currently deployed in the priority 1.5km x 1.5km central corridor, with the program designed to support a maiden JORC Mineral Resource Estimate.
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What the historic core has already revealed
The initial drill targeting is anchored by two headline intercepts from the re-sampling of historic drill core, first reported in OCN’s 9 July 2026 announcement:
- LG42: 50m @ 4.0% TREO from 53m, within a 114m @ 2.3% TREO mineralised zone to end of hole
- LG26: 22m @ 4.7% TREO from 101m (partial intercept), within an 84m @ 2.1% TREO mineralised zone to end of hole
TREO stands for Total Rare Earth Oxide and is the standard grade metric used to assess the economic value of a rare earths deposit. The higher the TREO percentage, the more valuable the mineralised material.
These two holes sit approximately 300m apart on the same section. That gap is the infill drilling opportunity: initial holes are stepping out around both intercepts to define the scale and continuity of mineralisation between them.
Managing Director Mick Wilson framed the significance directly:
Mick Wilson, Managing Director
“…we are pointing our rigs at a target corridor which the assays show contains grades and thicknesses in the top tier of carbonatite-hosted rare earth deposits globally.”
Re-sampling of approximately 8,000m of available historical core is continuing in parallel, with further assays pending. This is a low-cost workstream that is expected to expand the known mineralised footprint without additional drilling expenditure.
Understanding carbonatites and why Serra Negra’s scale matters
A carbonatite is an igneous rock composed primarily of carbonate minerals. These geological formations are among the most important hosts for rare earth elements globally, because the processes that create carbonatites concentrate rare earths to grades rarely found in other rock types.
Serra Negra sits within a 10km-wide carbonatite complex, an area three times larger than the nearby Araxá complex. Araxá is a meaningful reference point: it hosts significant rare earth deposits and the world’s largest niobium deposit. The scale comparison signals the district-level potential at Serra Negra, though the extent of economic mineralisation at Serra Negra remains to be established through the current drilling program.
For investors tracking junior miners, the JORC Mineral Resource Estimate is the number that matters most at this stage. A JORC Mineral Resource Estimate is a publicly reported estimate of the size and grade of a mineralised body, prepared in accordance with the Australasian JORC Code. It is the internationally recognised standard that underpins project valuation, development decisions, and the ability to attract institutional capital. For Oceana, delivering a maiden JORC Mineral Resource Estimate at Serra Negra is the near-term milestone that transforms exploration results into a quantified asset.
Program design, parallel workstreams and the path to a JORC resource
The program has been structured as a progressive ramp-up, commencing with portable rigs capable of testing priority targets with minimal ground disturbance. Track-mounted or truck-mounted rigs are expected to be introduced as access and productivity allow, increasing drilling capacity across the project area. The drilling contract has been awarded to Energold Drilling Corp.
Several workstreams are advancing alongside the maiden drilling program:
- Re-sampling of approximately 8,000m of historical core, with assays ongoing
- High-resolution drone LiDAR and magnetic surveys completed, with magnetic interpretation now underway
- A 3D geological model being built integrating geophysics and re-assay data
- Environmental approvals for the initial drilling phase received, with further applications progressing
- Landowner access agreements secured for Phase 1 areas, with additional agreements advancing
The indicative timetable for key milestones is set out below:
| Event | Date |
|---|---|
| Historical core re-sampling assay results | Ongoing |
| Interpretation of drone magnetic and LiDAR datasets | September 2026 |
| First assay results from maiden Oceana-led drilling program | Early Q4 2026 |
| Introduction of additional rigs and expansion of drilling capacity | Early Q4 2026 |
| Maiden Mineral Resource Estimate for Serra Negra | Coming months |
The above timetable is indicative only and is subject to change.
Completion of the acquisition of Songeo Mineração S.A. is expected imminently, with both parties working to satisfy the remaining conditions precedent.
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Well-funded to execute the exploration campaign
Oceana reported cash of approximately A$8.16m as at 30 June 2026. Separately, a further A$12.6 million (before costs) was received from Tranche 2 of the Placement in July 2026. These are two distinct figures representing the company’s exploration funding position as it enters this drilling campaign.
Wilson signalled the news pipeline investors can expect from here: “We expect a steady flow of technical results from here as we work toward a maiden Mineral Resource Estimate.”
With drilling underway, core re-sampling continuing, and drone magnetic data being processed, Oceana is entering a period of sustained exploration news flow across multiple workstreams.
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