Highlights

  • Oceana Metals shares rose 4.04% to AUD 0.52 on 14 May 2026 following updates on its Serra Negra Rare Earths Project in Brazil.
  • The company is preparing an initial ~20,000m drilling program aimed at defining the scale and continuity of rare earth mineralisation.
  • ~8,000m of historic drill core is being re-logged and re-assayed to validate rare earth element (REE) distribution.
  • Multiple Geophysical surveys are being planned, including drone magnetics, airborne EM and ground gravity work.
  • Oceana is targeting an initial resource estimate for Serra Negra in 2026, supported by drilling and assay programs

Oceana Metals Ltd (ASX:OCN) shares advanced 4.04% to AUD 0.52 on 14 May 2026, as investors responded to the company’s latest update on its Serra Negra Rare Earths Project in Brazil. The stock has delivered a substantial longer-term return, remaining up 1,616.67% over the past year, reflecting strong market interest in its rare earth exploration strategy and the scale potential of its newly acquired project portfolio.

The latest announcement focused on early-stage development activities at the Serra Negra Project, where Oceana is preparing for a major drilling campaign and expanded geological evaluation program. The update outlined a combination of drilling preparation, historical core re-analysis and geophysical surveying designed to improve understanding of the mineral system and support a maiden resource estimate expected later in 2026.

Drilling Program to Define Scale of Rare Earth System

A key element of the announcement is the planned initial drilling program of up to approximately 20,000 metres. According to the company, the program is designed to evaluate both the scale and geological continuity of the central rare earth element (REE) target area within the Serra Negra Carbonatite Complex.

Oceana Metals stated that the first phase of drilling will also focus on identifying extensions to known mineralisation and testing priority exploration targets across the broader 10km-wide carbonatite system. Drilling is expected to commence in the coming weeks, with assay results anticipated shortly thereafter.

The company highlighted that the objective of the program is to support the establishment of an initial mineral resource estimate later in 2026, marking a key milestone in the project’s development pathway.

Historic Core Re-Analysis to Strengthen Geological Understanding

Alongside the upcoming drilling program, Oceana has commenced a significant re-assaying initiative involving approximately 8,000 metres of historical drill core. This core was originally collected during earlier phosphate and titanium exploration campaigns, but had not previously been analysed for rare earth elements or niobium.

The company is re-logging, re-sampling and re-assaying the material in 1-metre intervals, with the aim of validating the distribution and continuity of REE mineralisation across the project area. Oceana has also implemented QA/QC procedures, including blanks and standards, to support future resource estimation work.

According to the company, initial field work is being conducted in Belo Horizonte, with plans to relocate operations closer to the project area in Patrocinio to improve logistical efficiency during the ongoing sampling campaign.

The re-assay program is expected to continue over the next two to three months, with results to be released in batches as they are received from laboratories.

Geophysical Surveys Planned Across Large Carbonatite Complex

Oceana Metals is also advancing plans for district-scale geophysical surveys across the Serra Negra Carbonatite Complex. The company noted that the region has not previously been subject to detailed modern geophysical analysis, creating an opportunity to better define the geological architecture and structural controls of mineralisation.

The planned surveys include high-resolution drone aeromagnetic mapping with 50-metre line spacing, ground gravity surveys on a 50–100 metre grid, and airborne electromagnetic (EM) studies.

These programs are expected to assist in mapping density variations, structural trends and conductive zones, all of which will support the identification of additional rare earth and niobium targets across the broader project area.

Oceana stated that the integration of geophysical data with drilling and assay results will be key to refining its exploration model and accelerating future discovery efforts.

Project Scale and Geological Context

The Serra Negra Project, recently acquired by Oceana Metals, is described as a large carbonatite complex located in Brazil’s Minas Gerais state within the Alto Paranaíba Igneous Province. The system spans approximately 10 kilometres and represents one of the larger known alkaline carbonatite intrusions in the region.

Historical exploration in the area primarily focused on phosphate and titanium, with 102 drill holes completed for a total of around 13,800 metres. However, previous exploration did not include systematic testing for rare earth elements or niobium, which Oceana now considers a key opportunity for resource re-evaluation.

Early-stage portable XRF analysis of selected historical core intervals indicated elevated rare earth element readings, which were later supported by laboratory check assays. These initial results have contributed to the company’s decision to advance a larger, structured exploration program.

Early Exploration Indicators and Management Commentary

According to Oceana Metals Managing Director Mick Wilson, initial observations from the project suggest the potential for a significant rare earth system. The company highlighted that Serra Negra is a large-scale carbonatite complex, significantly larger than some nearby analogues in the region that host established rare earth and niobium mineralisation.

Management noted that early-stage testing of historical core has already identified zones with elevated rare earth grades over meaningful widths, supporting the decision to proceed with both re-assay work and a new drilling program.

The company stated that the combination of historical core analysis, new drilling and geophysical interpretation is expected to provide a comprehensive dataset to assess the scale and continuity of mineralisation across the project.

Drilling Strategy and Execution Plan

Oceana has already submitted drilling applications and is in the process of selecting contractors for the initial program. Several drilling companies with regional experience have been approached to support the campaign.

The company plans to commence drilling with two diamond rigs, with the potential to expand to additional rigs depending on early results and operational performance. This staged approach is intended to accelerate the resource definition process and allow for rapid follow-up on newly identified targets.

Drilling will be supported by systematic logging and sampling protocols, designed to ensure consistency and quality of data collection for future resource estimation studies.

Geological Interpretation and Exploration Upside

The Serra Negra Carbonatite Complex has not previously been subject to modern integrated geophysical interpretation. Oceana believes this represents a significant opportunity to enhance understanding of the system’s internal structure and mineralisation controls.

The company’s exploration model is focused on identifying zones of rare earth and niobium enrichment associated with carbonatite intrusions. By combining geophysical datasets with drilling and geochemical analysis, Oceana aims to build a detailed geological framework that can guide future expansion of the project.

Corporate Development and Local Execution Strategy

Oceana Metals has also begun establishing its in-country operational team in Brazil to support project execution. The company has appointed a Land Access and Environmental Permitting Manager as well as a local Subsidiary manager for Oceana Minerals Brazil Ltda.

These appointments are intended to streamline permitting processes, support community engagement and coordinate field activities across the project area. Additional technical and operational roles are expected to be added as exploration activity increases.

The establishment of a local operating structure is expected to support both near-term exploration and longer-term development planning for Serra Negra.

Funding Position and Exploration Readiness

The company noted that it remains well funded following its recent Acquisition and Placement activities, with sufficient Capital available to support the planned drilling, geophysical and re-assay programs.

This financial position provides flexibility to execute the upcoming exploration strategy without immediate funding constraints, allowing Oceana to focus on accelerating resource definition activities at Serra Negra.

What This Means for Investors?

Oceana Metals’ latest update highlights a clear transition from acquisition into active exploration, with multiple parallel workstreams now underway at the Serra Negra Rare Earths Project. The combination of large-scale drilling, historical core re-analysis and geophysical surveying suggests a structured effort to rapidly define the scale and continuity of mineralisation.

Investor attention appears to be centred on the potential size of the carbonatite system and the early indications of rare earth mineralisation identified in historical drilling. While the project remains at an early exploration stage, the scale of planned activities in 2026 positions Serra Negra as a key focus area for the company moving