Diatreme Advances Silica and Zircon Projects with Strategic Cape Flattery Sale

Financial Position Bolstered Despite Loss

Diatreme Resources (ASX:DRX) closed its 2025 financial year with a statutory loss of $744,955, widening from $439,527 the previous year. Yet, the company shored up its balance sheet through strategic moves including the sale of intellectual property from its Metallica takeover, which generated $562,500, and the IPO of Moonlight Resources Limited after divesting the Clermont Copper/Gold Project. Diatreme retained a 16.76% stake in Moonlight, currently valued at $2.6 million but shares remain escrowed until December 2027, limiting immediate liquidity.

Combined with a $226,894 R&D tax incentive related to the Cyclone Zircon Project, Diatreme’s cash and liquid assets stood at $1.5 million at quarter-end, supplemented by $3.3 million held within the silica projects joint venture, bringing total available funds to $4.8 million. This financial buffer is critical as the company advances multiple projects and manages a $1 million debt facility due in May 2026.

Northern Silica Project: Drilling and Resource Expansion

The Northern Silica Project (NSP) in Far North Queensland continues to gain momentum. Aircore drilling at the Si2 and Casuarina deposits yielded favourable results, with 83 holes drilled for 2,035 metres. These results underpin an updated Mineral Resource Estimate (MRE) for Si2 and lay the groundwork for a maiden MRE at Casuarina. The drilling confirmed the geological model’s assumptions on dune thickness and mineralisation continuity, essential for advancing the project’s development.

Diatreme plans a staged follow-up program including further drilling, geological modelling refinement, and metallurgical testwork. Concurrently, the company is progressing environmental approvals, having lodged a Draft Environmental Impact Statement (EIS) with Queensland’s Office of the Coordinator-General. This EIS is expected to enter public consultation in the second half of 2026, a key milestone for permitting.

Community engagement remains active, with Diatreme’s Hope Vale office supporting social, cultural, and heritage assessments, alongside sponsorships and local events. The company is also negotiating mining agreements with Indigenous groups and local stakeholders, aiming to ensure project social licence and regional benefits.

Cape Flattery Silica Project Sale Streamlines Ownership

In a move to consolidate its Far North Queensland silica assets, Diatreme agreed post-quarter to sell its Cape Flattery Silica Project (CFSP) to the Cape Silica joint venture, which it controls alongside Sibelco Silica Pty Ltd. The transaction values CFSP at $26.01 million and will reimburse Diatreme approximately $2.1 million for costs incurred during the Metallica takeover. Additionally, the joint venture is set to receive around $7.4 million in fresh funding, including up to $9.5 million from Sibelco via share subscriptions and options.

This restructuring aims to centralise management, reduce costs, and enhance community engagement across the silica sand assets. The transaction awaits shareholder approval and regulatory clearances. The deal was welcomed by both Diatreme CEO Neil McIntyre and Sibelco’s Nick Traber, who highlighted the strategic benefits and the quality of the silica products for specialty glass and solar PV markets.

This development follows the recent sale of Cape Flattery Silica Project announcement, reinforcing Diatreme’s strategy to unlock value and streamline project pathways.

Cyclone Zircon Project Metallurgical Breakthrough

Technical advances at the Cyclone Zircon Project in Western Australia’s Eucla Basin have significantly improved the project’s outlook. Metallurgical testwork by Mineral Technologies boosted heavy mineral concentrate (HMC) production forecasts by 58% to 3.2 million tonnes, zircon output by nearly 7% to 866,000 tonnes, and titanium concentrate production almost doubled to 1.6 million tonnes. These gains stem from optimised processing flowsheets that enhance mineral recovery despite a slight drop in concentrate grade.

Diatreme is actively engaging with potential partners and investors to capitalise on these improvements. The company is also participating in critical minerals trade missions to the United States and Japan, seeking government funding and development partners to accelerate project advancement.

While zircon prices have softened recently, as noted in Iluka Resources’ Q4 report, these metallurgical gains could strengthen Cyclone’s economic case and investor appeal, complementing Diatreme’s broader critical minerals portfolio.

Looking Ahead: Resource Updates and Strategic Negotiations

In the June quarter, Diatreme plans to update the Si2 Mineral Resource Estimate and commence resource estimation at Casuarina, alongside completing a Pre-Feasibility Study and maiden Ore Reserves for the NSP. Environmental permitting will progress through the EIS process, with ongoing negotiations for port access and mining agreements with Indigenous corporations and native title holders.

For Cyclone, the focus will be on validating economic and engineering assumptions with the new metallurgical data, reviewing project start requirements, and exploring strategic options including asset sales, joint ventures, or a potential spin-out listing.

Cash flow management remains tight, with operating and investing outflows totaling $802,000 for the quarter and estimated funding coverage of under two quarters. However, the Cape Flattery transaction and joint venture funding are expected to provide critical liquidity support.