More high grade results put Resouro on road to resource upgrade at Tiros

Tiros drill results contain significant mineralisation of titanium and rare earth elements in all holes
72% of holes contain high-grade mineralisation upwards of 6000ppm total rare earth oxides and/or 16% titanium dioxide
Resouro now updating current 1.7Bt mineral resource estimate for Tiros Central Block

Special report: The remaining infill and step-out diamond drill hole intercepts from Resouro Strategic Metals’ Tiros Project have backed up earlier assay results confirming the asset’s world-class potential.

The latest 32 holes for 1891m back up the results from 14 holes Resouro (ASX:RAU) released last month, which identified a broad zone of high-grade mineralisation close to surface.

Among the highlights from the latest batch are 54m at 13.04% TiO2 and 3593ppm TREO from surface, which in turn includes 3m at 26.05% TiO₂ and 7936ppm TREO from only 5m.

Another standout is an interval of 50m at 12.80% TiO2 and 4491ppm TREO from 17m, including 6m at 25.34% TiO2 and 10,036ppm TREO from 23m.

Seventy-two per cent of holes contain high-grade mineralisation: +6000ppm TREO and/or 16 per cent for TiO2.

The infill and step-out campaign, which was developed after the publication of the mineral resource estimate of 1.7Bt last July, consisted of 46 drill holes for 2922m at the Tiros Central Block.

The region selected for this campaign is confirmed as highly prospective due to the elevated grades and the thin cover of overburden.

Resouro is now in the process of finalising an update to the MRE, which already makes it one of the world’s largest JORC combined rare earths and titanium deposits.

There’s even more potential for resource growth down the track as the Central Block covers only 7% of the 497km2 project.

Resouro CEO Alistair Stephens said: “We continue to see world-class assay results from near-surface at the Tiros Central Project. These results will be used for a review of the mineral resource estimate that we anticipate will be published in the near term. Outcomes of metallurgical test works … are also very close to finalisation.”

Map of the drilling grid at the Tiros Central Block of 250 hectares. Pic: RAU

In development fast lane

The latest highly encouraging drill results closely follow Resouro joining a leading network of Brazilian rare earth collaborators via the MagBras Initiative.

As the global race for alternative critical minerals supply chains heats up, this project dedicated to producing rare earth permanent magnets entirely within Brazil.

That came after Resouro started 2025 with the appointment of Progesys International as project engineering managers and releasing its full work program to transform Tiros into a low-cost critical minerals mine.

To further support its development goals at Tiros, Resouro last year signed a memorandum of understanding with key institutions, the Minas Gerais State Economic Development Department and the Integrated Economic Development Institute (Invest Minas). These will enable Resouro to collaborate with Invest Minas to accelerate Tiros’ permitting, construction and mining.

This article was developed in collaboration with Resouro Strategic Metals, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.