
Tungsten Mining drills 25,000m at Watershed targeting resource upgrade and 2027 production. PEE showed $1.3B NPV on $274M capex. Results due October.
Tungsten Mining (ASX: TGN) kicked off a large reverse circulation and diamond drilling campaign at its Watershed project in Queensland on Monday. The program targets a resource upgrade and feeds into the company's push toward a final investment decision by 2027.
The RC portion covers 175 holes for roughly 15,000 meters, focused on known high-grade zones within planned initial mining areas. Tungsten expects completion within four months, with results feeding an updated mineral resource model.
Diamond drilling will run 75 holes for about 5,700 meters over three months, collecting metallurgical samples and geotechnical data for process design, pit design, and detailed engineering.
Tungsten acquired Watershed from Vital Metals in 2018, inheriting a definitive feasibility study. An updated resource estimate in June pegged the deposit at 69.7 million tonnes at 0.109% tungsten oxide for 76,000 tonnes of contained metal.
The preliminary economic evaluation released shortly after outlined a high-margin project. Management said it could reach production in 2027 with $274 million in capex, producing a $1.3 billion net present value.
Chair Gary Lyons said the campaign was the next step following the strong PEE outcomes. RC drilling, he said, will concentrate on areas of known high-grade mineralisation targeted for initial mining, designed to provide greater confidence for resource modelling and mine planning. Diamond work will provide metallurgical samples and geotechnical information to refine process design, pit design, and detailed engineering.
"Together, these programs will further enhance the technical definition of Watershed and help reduce project development risk as we advance," Lyons said.
Initial drilling results are expected from October this year.
Watershed sits in north Queensland's tungsten province. The deposit is one of the few advanced-stage tungsten projects in Australia, a country that hosts no operating tungsten mines despite holding significant resources. China controls roughly 80% of global tungsten supply, a concentration that has pushed Western buyers to seek alternative sources.
The PEE assumed a processing rate of 3.5 million tonnes per year over a 17-year mine life. At spot tungsten prices near $30,000 per tonne, the project generates a 35% internal rate of return, the company said. The economics depend on tungsten oxide prices staying above $24,000 per tonne, a level the market has held for the past 18 months.
Tungsten Mining has not yet locked in offtake agreements for Watershed production. The company said it expects to begin discussions with potential customers once the resource upgrade is complete. A bankable feasibility study would follow the current drilling program, with a final investment decision targeted for late 2026.
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