Flagship outlines 40Mt tungsten target and weighs Khao Soon sale
Flagship Minerals has outlined a conceptual 22 million to 40 million tonne tungsten Exploration Target at its Khao Soon project in southern Thailand. The company is now weighing a sale, spin-out or joint venture for the non-core asset, but the target remains well short of a Mineral Resource.
- 22Mt to 40Mt Exploration Target across five mineralised zones
- Grades range from 0.15% to 0.30% WO3
- Than Pho West carries the largest target range
- Sale, spin-out or joint venture options under review
- Metallurgy, drilling and geophysics are the next technical steps
Khao Soon delivers a 40Mt conceptual target
Flagship Minerals Limited (ASX:FLG) has put a sizeable number around the long-held Khao Soon tungsten project, reporting a JORC 2012 Exploration Target of 22 million to 40 million tonnes grading between 0.15% and 0.30% tungsten trioxide, or WO3. The estimate spans five mineralised zones in southern Thailand and gives the company a potential asset monetisation story alongside its gold and copper strategy.
The largest component is Than Pho West, estimated at 9 million to 14 million tonnes grading 0.20% to 0.30% WO3. Last Hill contributes 5 million to 10 million tonnes at 0.20% to 0.40%, while Target 2 is estimated at 4 million to 10 million tonnes at 0.15% to 0.30%. Than Pho Ridge and Target 1 make up the balance, with Target 1 carrying the lowest stated grade range at 0.05% to 0.08% WO3.
Drilling supports several near-surface zones
Flagship says the targets were built from historical and recent drilling, soil and rock-chip sampling, geological mapping and geophysics. The work includes 30 diamond holes drilled by Flagship between 2017 and 2021, alongside 64 aircore holes completed by Thai Goldfields in 2013. Across the broader project, the five interpreted trends cover about 4.5 kilometres of aggregate strike and remain open laterally and at depth, according to the company.
Some of the more substantial reported intersections sit at Than Pho West. They include 51.2 metres at 0.50% WO3 from surface in KSDD001, including 12.8 metres at 1.07%, and 59.4 metres at 0.43% WO3 from surface in KSDD032. These are downhole results supporting an exploration model; they do not, by themselves, establish the continuity or economic parameters needed for a mineable resource.
Asset strategy shifts from drilling to monetisation
Flagship describes Khao Soon as non-core to its strategy of advancing the Isidora Gold project in Chile and pursuing larger gold or copper opportunities, including the Whipsaw Copper project in Canada. It is considering three routes: an outright sale, a spin-out into a dedicated listed vehicle, subject to shareholder and ASX approvals, or a joint venture with a strategic partner. No transaction has been agreed.
The potential attraction for shareholders is straightforward: a deal could provide capital for Flagship’s gold and copper programs without issuing new shares. That remains a possibility rather than an outcome, however, and the value of any transaction would depend on how a buyer, partner or new vehicle assesses a project that is still at the Exploration Target stage.
Metallurgy and licence conditions remain material hurdles
Flagship’s own disclosure places important limits around the headline tonnage. The estimate is conceptual, with insufficient exploration completed to define a Mineral Resource. It makes no assumptions about economic viability, mining selectivity or metallurgical performance. Core recovery in the mineralised zones averaged about 71% overall in the company’s discussion, with the JORC commentary reporting approximately 65% for HQ3 core and 82% for PQ core; historical drilling and data quality also remain limitations.
The proposed technical sequence starts with metallurgical work to test tungsten hosted in scheelite, goethite and limonite, followed by additional drilling if the results justify it. Drone magnetics, induced-polarisation, gravity and magnetotelluric surveys may also be used to investigate deeper primary tungsten targets. Tenure adds another layer of uncertainty: three licence applications cover about 26 square kilometres, while the area containing the historic mine includes conservation forest and watershed classifications that may require Thai Cabinet approval.
Khao Soon therefore offers Flagship a potentially useful strategic option, but the next value test is not the upper end of a conceptual tonnage range. It is whether metallurgy, tighter drilling, permitting and a credible transaction pathway can turn a long-explored Thai tungsten district into an asset someone is prepared to fund.
Bottom Line?
The 40Mt upper estimate creates a clearer monetisation proposition, but metallurgy, recovery, tenure and resource definition will determine whether Khao Soon attracts a partner or buyer.
Questions in the middle?
- Can Flagship convert the Exploration Target into a JORC Mineral Resource given the stated recovery and historical-data limitations?
- Will metallurgical testing demonstrate a viable recovery pathway for tungsten hosted in weathered and lateritic material?
- Does the project attract a sale, joint venture or spin-out on terms that provide meaningful funding for Isidora and the company’s copper initiatives?
