South Australia

THE EROMANGA BASIN

Overview

The Eromanga Project spans several thousand square kilometres of the northern part of the Gawler Craton in South Australia. The area gained attention for Heavy Mineral Sands potential after Petratherm’s’ high-grade Rosewood HMS discovery.

Heavy Mineral Sands Potential

In early May, a reconnaissance trip to the Eromanga Basin Project, led by Altitude Minerals’ world-leading HMS expert Ian Warland, collected grab samples that contained high-value zircon and titanium minerals. This high-grade mineral assemblage underscores the potential of this underexplored region.

Assay* highlights of pan-concentrated grab samples include:
• 35% zircon, 20% Ilmenite, 20% leucoxene, 5% Rutile (CUSHM002)
• 25% zircon, 50% Ilmenite, 10% leucoxene, 5% Rutile (CUSHM001)
• 25% zircon, 55% Ilmenite, 5% leucoxene, 5% Rutile (CUSHM003)
• All with low amounts of “trash” minerals

Altitude Minerals swiftly moved to secure its ground position in the region with the successful application for tenements EL7071 Nilpinna and EL7072 Eddy, and additional ground staking further to the west and adjacent to the Petratherm Rosewood HMS discovery. The exploration team is now undertaking further field reconnaissance, mapping and target validation. The team is also working closely with the Arabana People, the traditional owners, to complete a heritage survey and clear the way for an anticipated 4,000m air-core drill campaign set for Q3-Q4 2025.

While investors familiar with the Peake Project know that our primary focus has been copper, the recent identification of heavy mineral sands (HMS) highlights the company’s rigorous assessment and commitment to identifying the best opportunities for our shareholders. Opportunities that meet a clear set of selection criteria: in-demand commodities, favourable jurisdictions, nearby known deposits and economic scale potential.

Recent discoveries in the Eromanga Basin—such as Petratherm’s Rosewood Prospect— underscore the region's broader potential for significant HMS deposits. Prospective sedimentary basins often host multiple HMS systems; the Eucla, Murray, and Perth basins are clear examples.

While HMS may not be as well-known as other commodities, these deposits contain minerals critical to global supply chains. They are refined to produce titanium, zirconium, and rare earth elements—essential inputs across traditional industries and high-tech manufacturing. This makes HMS both commercially valuable and strategically important. The HMS potential at the Peake Project was identified by Ian Warland, a previous recipient of the “Discovery of the Year” award for his discovery of the world-class Jacinth HMS deposit in South Australia. I’m pleased to welcome Ian to the Copper Search team. His proven expertise—from project generation to feasibility and production—will be a major asset to our exploration efforts.
Duncan Chessell
Managing Director

The Eromanga Basin is known to host significant HMS discoveries, including recent finds by Petratherm (ASX: PTR) and Marmota (ASX: MEU) and highlights the region’s strong HMS potential. Terrain features suggest potential trap sites for heavy minerals along the outcropping Peake and Denison Ranges. The Peake Project area has an extensive thickness of HMS target horizons, host to heavy mineral sand deposits elsewhere. A second tenement area (in application) reveals promising magnetic signatures that may indicate ilmenite-rich strand lines—an exploration model proven in regions like the Murray Basin

Latest news from The Eromanga Project