Highlights

  • TG Metals completes five diamond holes at Burmeister totalling 759.9 metres, with best result 12.35m at 1.53% Li2O from 197.25m in DSO002.
  • Six composite samples exceeding 1.2% Li2O have been sent to potential offtake customers, financing partners and development partners for independent testing.
  • The Burmeister deposit hosts an Inferred resource of 6.71 million tonnes at 1.18% Li2O, estimated in August 2026 under the JORC Code.
  • A direct shipping ore strategy is being studied, with fauna surveys and a water exploration licence programme under way in support of feasibility work.

TG Metals Limited has handed the next judgement on its Burmeister lithium deposit to outside parties. The company (ASX:TG6) reported results from five diamond holes at Burmeister, part of its Lake Johnston Lithium Project in Western Australia, and said composite samples from the core had gone to potential offtake customers, financing partners and development partners for independent evaluation.

Drilling Results

The programme comprised five HQ3 diamond holes totalling 759.9 metres, drilled by Raglan Drilling, designed to infill the existing direct shipping ore (DSO) resource, provide representative core for prospective partners and test down-dip extensions. Lengths ranged from 54.8 metres in DSO006 to 249.4 metres in DSO002.

The strongest hole was DSO002, which returned 12.35 metres at 1.53% Li2O from 197.25 metres, along with 1.95 metres at 2.37% Li2O from 157.70 metres, 2.05 metres at 1.63% from 160.00 metres and 1.85 metres at 1.64% from 224.05 metres. TG Metals states downhole widths approximate true widths. Individual pegmatite samples within DSO002 exceeded 2% Li2O in places, with internal dilution mainly confined to thin feldspar-rich sections typically less than one metre thick. Other holes returned narrower or lower-grade intervals: DSO004 intersected 5.00 metres at 1.24% Li2O from 133.00 metres, DSO005 returned 5.00 metres at 1.04% from 136.60 metres, and DSO003 recorded 4.90 metres at 0.68% from 129.10 metres. DSO006, drilled only into shallow pegmatite, intersected weathered and depleted material with no significant intercept.

The Partner Samples

Six composite samples were prepared from the pegmatite intercepts. All exceeded a nominal 1.2% Li2O criterion without ore sorting. Quarter core has been retained, with half of the remaining core earmarked for metallurgical testwork. The announcement does not include metallurgical test results, so claims about product quality rest on assay data and the partners' own assessments. Chief executive David Selfe said the aim is to "accelerate development while minimising capital requirements for the Company."

The Resource

Burmeister hosts an Inferred mineral resource, reported on 18 August 2026 under the JORC Code, of 6.71 million tonnes at 1.18% Li2O, using a 0.40% cut-off within an optimised pit shell. The company notes that mineral resources are not ore reserves and that further economic studies are required. The project is approximately 241 kilometres from the port of Esperance, and TG Metals is studying a DSO route in which mineralised rock would be sold with minimal processing. The release contains some internal inconsistencies, including cut-off grades quoted at 0.4, 0.5 and 1.0% in different sections; readers should rely on tabulated results.

Next Steps

TG Metals has listed several workstreams without specific dates. Partners will assess sample quality and processing parameters, while DSO studies continue to incorporate pricing and partner feedback. Flora, fauna and Aboriginal heritage surveys are planned along access routes, and a first-pass water exploration programme is being prepared under a granted water exploration licence. Close-spaced shallow drilling is still needed to define the oxidation boundary, and further infill drilling is planned to support resource expansion. The outcome of partner testing, and whether it leads to any binding offtake or funding arrangement, remains undisclosed.