Expansive surface Au-Ag-Pb anomalism suggests growth potential

HIGHLIGHTS

• March 2025 Tolmer discovery hole ranked 5th highest-grade silver intersection reported globally during H1 2025, with an interval of 6m @ 4,747 g/t Ag from only 46m depth

• May - June 2025 drilling confirmed extensions of high-grade silver (~200 - 4,750 g/t Ag) within ‘western silver zone', with the emergence of high-grade gold alongside silver (~5 - 50 g/t Au)

• New soil assays indicate potential northwest-southeast orientation of mineralisation and confirm broad surface gold (Au), silver (Ag) and lead (Pb) anomalism across Tolmer, with potential for material extensions of Au-Ag-Pb mineralisation in the ‘western silver zone'

• Assays for 595.3m oriented Tolmer diamond drilling pending (results expected early November), with results to help inform structural interpretation and follow up targeting across Tolmer

• Other soil assays indicate potential gold anomalism consistent with interpreted structural features at Black Oak Tank prospect, along interpreted faults parallel to the Lake Labyrinth Shear Zone (LLSZ)

ADELAIDE, AU / ACCESS Newswire / September 23, 2025 / Barton Gold Holdings Limited (ASX:BGD)(OTCQB:BGDFF)(FRA:BGD3) (Barton or Company) is pleased to announce the assay results of ultrafine soil sampling programs completed at the Tolmer and Black Oak Tank prospects of its South Australian Tarcoola Gold Project (Tarcoola).

New assay results for these programs indicate potential for:

• Tolmer: extensions of the high-grade ‘western silver zone', and similar new previously untested targets located between the ‘western silver zone' and the ‘eastern gold zone'; and

• Black Oak Tank: potential for interpreted structures to host continuous gold mineralisation.

Samples were collected during July 2025 over a ~1.9km² surface area surrounding the Tolmer gold and silver discoveries, along with a ~23km2 area covering the LLSZ, both located on the Company's Tarcoola tenements.

Full details are contained in the complete announcement, which can be accessed on the ASX website, the investor section of Barton's website, or directly by clicking here.

Commenting on the Tolmer soil assay results, Barton Managing Director Alexander Scanlon said:

"These assays provide the first hints as to orientation at Tolmer, indicating a potential overall northwest-southeast trend to the western silver zone and the potential for material extensions of its high-grade silver-gold footprint.

"We have also identified potential new opportunities located between the ‘western silver' and ‘eastern gold' zones, where coincident Au-Ag-Pb anomalies present secondary targets analogous to the more prominent footprint of the ‘western silver zone'. We expect that pending assays from our recent diamond drilling program in the ‘eastern gold zone' will materially assist our interpretation of local structural controls, and guide follow up drilling targeting."

Authorised by the Managing Director of Barton Gold Holdings Limited.

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About Barton Gold

Barton Gold is an ASX, OTCQB and Frankfurt Stock Exchange listed Australian gold developer targeting future gold production of 150,000ozpa with 2.2Moz Au & 3.1Moz Ag JORC Mineral Resources (79.9Mt @ 0.87g/t Au), brownfield mines, and 100% ownership of the region's only gold mill in the renowned Gawler Craton of South Australia.*

Challenger Gold Project 313koz Au + fully permitted Central Gawler Mill (CGM) Tarcoola Gold Project 20koz Au in fully permitted open pit mine near CGM Tolmer discovery grades up to 84g/t Au & 17,600g/t Ag Tunkillia Gold Project 1.6Moz Au & 3.1Moz Ag JORC Mineral Resources Competitive 120kozpa gold & 250kozpa silver project Wudinna Gold Project 279koz Au project located southeast of Tunkillia Significant optionality, adjacent to main highway

Competent Persons Statement & Previously Reported Information

The information in this announcement that relates to the historic Exploration Results and Mineral Resources as listed in the table below is based on, and fairly represents, information and supporting documentation prepared by the Competent Person whose name appears in the same row, who is an employee of or independent consultant to the Company and is a Member or Fellow of the Australasian Institute of Mining and Metallurgy (AusIMM), Australian Institute of Geoscientists (AIG) or a Recognised Professional Organisation (RPO). Each person named in the table below has sufficient experience which is relevant to the style of mineralisation and types of deposits under consideration and to the activity which he has undertaken to quality as a Competent Person as defined in the JORC Code 2012 (JORC).