Tungsten Mining NL (ASX:TGN): What Does the Mt Mulgine Study Reveal About Project Development?

Aditi Sarkar

28 October 2026 08:49 PM AEDT

Tungsten Mining NL (ASX:TGN): What Does the Mt Mulgine Study Reveal About Project Development?

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Highlights

Mt Mulgine pre-feasibility work outlines a 21-year mine-life scenario and staged development.
The company’s published study highlights A$6.8 billion pre-tax net present value and a 55% pre-tax internal rate of return.
A 16 October 2026 announcement reported initial drilling results at Mt Mulgine.
September disclosures covered a A$50 million capital raising and funding work for the Watershed project.
Project economics remain estimates rather than realised production or cash flows.

Tungsten Mining NL (ASX:TGN) is an Australian exploration and development company focused on tungsten resources, including its Mt Mulgine project in Western Australia and Watershed project in Queensland. Its September 2026 Mt Mulgine pre-feasibility study established an updated development scenario, while subsequent drilling and funding announcements added detail to its project pipeline. The studies describe potential future operations; TGN has not presented their modeled earnings as actual operating results.

Mt Mulgine Economics and Development Assumptions

Tungsten Mining published the Mt Mulgine pre-feasibility study on 1 September 2026. The company’s project materials present a 21-year mine life, pre-tax net present value of A$6.8 billion and pre-tax internal rate of return of 55%. These figures are calculated study outputs dependent on assumed prices, recoveries, operating costs, capital expenditure and project timing. They should not be read as cash already generated by ASX:TGN or as guaranteed investment returns.

Resource Base and New Drilling Activity

According to the company’s published resource table, Mulgine Trench contains a reported 247 million tonnes of mineral resources, comprising 175 million tonnes Indicated and 72 million tonnes Inferred. The table attributes 270,000 tonnes of contained tungsten trioxide to that deposit. Mt Mulgine’s wider stated resource inventory also includes Mulgine Hill. Mineral resources describe estimated quantities and grades; they are not interchangeable with economically recoverable ore reserves.

On 16 October 2026, ASX:TGN released an announcement titled “Mt Mulgine initial drilling results exceed expectations”. The update does not, by itself, establish revised resources or improved project economics.

Watershed Funding Adds Another Development Track

Mt Mulgine is not the only asset on Tungsten Mining’s current agenda. The company’s website describes Watershed as a separate potential tungsten development in Queensland, targeting first production in the first half of 2027. Its published study materials cite an eight-year mine life, A$1.3 billion pre-tax NPV and a 198% pre-tax IRR for Watershed. These are project-model estimates rather than reported profits.

During September 2026, TGN announced a A$50 million capital raising, appointed a funding adviser and separately reported indicative debt terms for Watershed. This activity does not establish that all construction funding is committed. The company also disclosed Watershed project approvals in September, a separate milestone from its financing and operational readiness.

Execution Risks and Items to Monitor

The principal uncertainties for ASX:TGN include funding availability, the transition from studies into detailed engineering, mining and processing performance, commodity pricing and permitting obligations. A large published pre-tax NPV does not remove sensitivity to assumptions. Construction cost increases, changes in recovery rates or later-than-planned commissioning could alter future economics. Newly issued shares can also change the company’s capital structure.

Further assessment depends on the next study and technical results at Mt Mulgine, detailed financing disclosures for Watershed, and updated project schedules. The company’s first-production targets remain forward-looking milestones subject to development, procurement, approvals and commissioning outcomes.

Key Insights

Tungsten Mining’s 2026 disclosures provide a clearer framework for assessing Mt Mulgine and Watershed, including published study economics, a defined resource base and ongoing project activity. Mt Mulgine’s pre-feasibility numbers are material estimates but do not establish commercial viability by themselves. For ASX:TGN, the distinction between calculated project value, financing progress and eventual operating performance remains central.

FAQs

Q: What does Tungsten Mining develop?

A: It develops tungsten projects, including Mt Mulgine in Western Australia and Watershed in Queensland.

Q: What does the Mt Mulgine study estimate?

A: Company materials show a 21-year mine life, A$6.8 billion pre-tax NPV and 55% pre-tax IRR.

Q: Is Mt Mulgine already producing tungsten?

A: The cited results are development-study estimates, not evidence of production from the proposed operation.

Q: What happened in October 2026?

A: TGN released a Mt Mulgine initial drilling results announcement on 16 October 2026.

Q: What are the main remaining project uncertainties?

A: Financing, detailed engineering, mining and processing assumptions, pricing and implementation timing remain relevant.

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