Petratherm Commences Resource Drilling at Rosewood Titanium Project

Perth, WA | 3 November 2025 — Petratherm Limited (ASX: PTR) has commenced resource drilling at its Rosewood Titanium Project in South Australia, targeting a maiden JORC (2012) Mineral Resource across a ~40 km² footprint before year-end. The air-core (AC) program totals more than 400 holes (~8,000 m), with assaying to follow.

Highlights

• Maiden Resource in sight: Drill spacing designed to deliver an Indicated Resource at Rosewood East, with a surrounding Inferred Resource across the broader area (from 200 m × 500 m down to 100 m × 200 m).
• Scale & tempo: ~400 AC holes / ~8,000 m; average depth ~20 m (to ~40 m in thicker zones); program scheduled to finish pre-Christmas.
• High-grade, near-surface heavy mineral (HM) sands: Two broad zones over ~22 km² with ≥10 m @ >5% HM, and much of the area ≥10 m @ >8% HM, starting from ~5–7 m depth and lying flat.
• Metallurgical credentials: Valuable Heavy Mineral (VHM) content to ~95%, dominated by high-value titanium minerals; coarse-grained HM amenable to high recoveries using conventional gravity spirals.
• Assays & studies: Samples dispatched weekly to Diamantina Laboratories (Perth); additional characterisation (incl. XRF and related techniques) to support domaining and the resource model.
• Tenure & JV: Rosewood East (EL6855) — 100% PTR; Rosewood West (EL6715) — PTR 70% / Narryer Metals (ASX: NYM) 30%.
• Baseline environmental work: ERIAS Group engaged for flora/fauna studies across the project and a potential ~35 km haul route to rail sidings east of Rosewood, supporting future approvals.

Comments from management

“Several rounds of exploration drilling over the last 12 months have confirmed the Rosewood Titanium Project as a major high-grade HM discovery. We are now undertaking infill drilling to support a maiden JORC (2012) Resource, with the aim of converting a significant portion of the prospect to the Indicated category.”

“In parallel, we are accelerating long-lead baseline environmental work with ERIAS Group so that development studies can progress efficiently. We look forward to providing further updates as drilling and assays come to hand.”
— Peter Reid, Chief Executive Officer

Petratherm expects the infill program to deliver strong dataset coverage for the resource estimate while environmental baseline work proceeds in parallel. Further updates will follow as drilling and assaying progress.