TG Metals finds more high-grade lithium at Burmeister

Burmeister drilling delivers high-grade lithium intervals

TG Metals Limited (ASX:TG6) has strengthened the geological case for a direct shipping ore operation at its Burmeister lithium deposit, reporting a 12.35-metre intersection grading 1.53% Li2O from diamond hole DSO002. The same hole also returned shorter intervals at 2.37%, 1.63% and 1.64% Li2O, with several individual one-metre sections grading above 2%.

The results came from five diamond holes totalling 759.9 metres. Other highlighted intersections included 5 metres at 1.24% Li2O in DSO004 and 5 metres at 1.04% in DSO005. The reported widths are downhole measurements and are only approximate to true widths, an important qualification when assessing the potential mining shape.

Six samples clear the stated DSO benchmark

The drilling was designed not only to infill the deposit, but also to produce representative core for potential offtake and financing partners. TG Metals said all six composite samples exceeded its nominal 1.2% Li2O direct shipping ore specification without ore sorting, and has dispatched the samples for independent product and downstream-processing assessment.

That work builds on the maiden Burmeister resource, which reported 6.71 million tonnes at 1.18% Li2O. The resource is entirely classified as Inferred, however, and the company has not declared a Mineral Reserve. The latest drilling therefore supports the existing geological interpretation rather than establishing an economic operation.

Mineralisation extends below the conceptual pit shell

TG Metals said mineralised pegmatite was intercepted down dip of the pit shell used for the August resource estimate. It said the results could support an expansion of the resource through further infill drilling, while also identifying exploration upside at depth.

“Long Section view zoomed in, of new drilling and modelled lithium pegmatites with conceptual DSO pit shell.”

Caption and image © TG Metals Limited. From “High Grade Lithium Drill Results at Lake Johnston”, 26 Oct 2026.

There is still some mine-design work to do. The oxidation boundary proved variable: spodumene was preserved in some upper pegmatite, while other sections were depleted. The company said closer-spaced shallow drilling will be needed to define the boundary for grade control and pit planning. A shallow 54.8-metre hole, DSO006, encountered weathered and depleted pegmatite.

Development work moves towards studies and permitting

Management said the project remains focused on an open-pit DSO model, with feasibility studies and permitting progressing alongside commercial discussions. TG Metals CEO David Selfe said the company was targeting an operation with lower capital requirements and simpler mining, while noting that product assessments and financing discussions are still under way (ASX:TG6).

The mining lease application for Burmeister is progressing, a water exploration licence has been granted, and further flora, fauna and Aboriginal heritage surveys are planned along access routes. Those steps move the project beyond geology, but they do not yet resolve the central questions of mine economics, funding, approvals or product acceptance.