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Barton Gold has strengthened the resource base underpinning its Tunkillia gold project in South Australia, upgrading almost one million ounces to higher-confidence classifications ahead of a planned pre-feasibility study (PFS).
The updated mineral resource estimate comprises 1.5 million ounces of gold, including 989,000 ounces classified as measured and indicated, with 151,000 ounces now in the highest-confidence measured category.
The upgrade follows 57,653m of reverse circulation and diamond drilling across 520 holes, designed to improve confidence in the mineralisation within the open-pit designs outlined in Barton’s May 2025 optimised scoping study.
Within those pit designs, measured and indicated resources increased 14 per cent to 822,000 ounces, while total contained gold remained broadly consistent with the earlier study.
Located approximately 530km north-west of Adelaide, Tunkillia forms part of Barton’s broader South Australian gold portfolio, which now contains approximately 2.2 million ounces of gold resources.
The updated estimate also identifies 131,000 ounces of indicated resources outside the earlier scoping study pit designs, which Barton considers an opportunity for potential expansion during the next phase of project evaluation.
Further drilling targets include shallow, higher-grade mineralisation within the proposed starter pits, where the company is assessing opportunities to upgrade additional inferred resources.
Barton is progressing technical studies, environmental surveys and project financing discussions as it works towards completing Tunkillia’s PFS in the first quarter of 2027.
Barton managing director Alexander Scanlon said the results supported the company’s development and financing plans.
“These results confirm a robust basis for Tunkillia’s PFS, and upgrading 151koz Au to ‘measured’ classification provides material support for expedited conversations for project finance, as well as available low dilution funding pathways,” he said.
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