Tolmer’s ‘Silver Zone’ Drilling Program Expanded

Barton Gold is prioritizing silver exploration at the Tolmer discovery in South Australia, following promising initial drilling results in the western “silver zone.” The company has shifted focus, expanding silver zone drilling and planning follow-up programs after reallocating resources from planned gold exploration. High-grade silver intercepts of up to 4,747 g/t Ag have been encountered.

Early Drilling Data Sharpens Focus on Silver Potential at Tolmer Discovery

Highlights

  • Reverse circulation (RC) drilling program (~2,500m) is underway at the Tolmer discovery.

  • Planned gold exploration will be reallocated, prioritizing silver zone following promising initial observations.

  • Additional drill targets added north, east, south, and west of the high-grade discovery area.

ADELAIDE, AUSTRALIA / June 9, 2025 / Barton Gold Holdings Limited (Barton or Company) has announced an update on its ongoing RC drilling program at the Tolmer high-grade silver discovery, part of the Tarcoola Gold Project (Tarcoola) in South Australia. The initial phase of drilling, which began with a primary focus on the western “silver zone”, has prompted a strategic shift in resource allocation. Planned gold drilling is now deferred in favour of expanding the silver zone drilling, with follow-up programs anticipated to commence as early as late July.

Tolmer's 'Silver Zone' Drilling Program Expanded
Tolmer's 'Silver Zone' Drilling Program Expanded

Figure 1 – Tolmer ‘western silver’ & ‘eastern gold’ zones showing expanded silver drilling lines

Barton’s Managing Director, Alexander Scanlon, commented on the revised drilling program:

“Based upon early observations we are refocusing all current Tolmer drilling on the western ‘silver zone’. We will expedite these assays to inform near-term follow-up programs, likely to include orientation diamond drilling.”

Expanding the Silver Zone Footprint

Barton originally identified Tolmer as a significant gold discovery in August 2024. Subsequently, the company identified a new “silver zone” approximately 500 meters west. This zone was revealed through a series of seven discovery holes, yielding impressive assay results. Some key highlights include:

Hole ID

Interval

Including:

TBAC130

6m @ 4,747 g/t Ag from 46 metres

1m @ 17,600 g/t Ag from 46 metres

TBM227

4m @ 1,417 g/t Ag from 9 metres

1m @ 3,790 g/t Ag from 9 metres

TBM228

14m @ 434 g/t Ag from 46 metres

1m @ 3,350 g/t Ag from 54 metres

The ~2,500-meter RC drilling program was initiated on May 22nd and designed to both infill and extend the western “silver zone” and the eastern “gold zone”. Based on early surface reconnaissance and drilling observations, Barton decided to amplify the ‘silver zone’ program, concentrating on data collection within this area with the remaining program time.

Consequently, seven drill holes originally allocated to the eastern “gold zone” have been redirected to establish eight new drill holes in the western “silver zone”. This expands the planned RC hole lines from three to five. Furthermore, the total Tolmer drilling program has been expanded from ~2,500m to a revised total of ~2,850m.

The expanded ‘silver program’ drilling is expected to wrap up this week. Assays will be accelerated for laboratory analysis, facilitating the strategic planning of follow-up drilling endeavors. Expected follow-up programs could include additional RC drilling, specifically within the gold zone, and structural orientation diamond drilling.

Tolmer's 'Silver Zone' Drilling Program Expanded

Figure 2 – Tolmer ‘silver zone’ cross-section (see Fig. 2) with anomalous Ag-Pb and key intersections

The information relating to historic Exploration Results and Mineral Resources in this announcement is extracted from the Company’s Prospectus dated 14 May 2021 or as otherwise noted in this announcement, available from the Company’s website at www.bartongold.com.au or on the ASX website www.asx.com.au.

Cautionary Statement Regarding Forward-Looking Information

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 1.7Moz Au & 3.1Moz Ag JORC Mineral Resources (64.0Mt @ 0.83 g/t Au), brownfield mines, and 100% ownership of the region’s only gold mill in the renowned Gawler Craton of South Australia.

Tarcoola Gold Project

  • Fully permitted open pit mine with ~20koz Au within trucking distance of Barton’s Central Gawler Mill

  • Historical goldfield with new high-grade gold-silver discovery in grades up to 83.6 g/t Au and 17,600 g/t Ag

Tunkillia Gold Project

Key Regional Infrastructure

Tolmer's 'Silver Zone' Drilling Program Expanded

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).

Activity

Competent Person

Membership

Status

Tarcoola Mineral Resource (Stockpiles)

Dr Andrew Fowler (Consultant)

AusIMM

Member

Tarcoola Mineral Resource (Perseverance Mine)

Mr Ian Taylor (Consultant)

AusIMM

Fellow

Tarcoola Exploration Results (until 15 Nov 2021)

Mr Colin Skidmore (Consultant)

AIG

Member

Tarcoola Exploration Results (after 15 Nov 2021)

Mr Marc Twining (Employee)

AusIMM

Member

Tunkillia Exploration Results (until 15 Nov 2021)

Mr Colin Skidmore (Consultant)

AIG

Member

Tunkillia Exploration Results (after 15 Nov 2021)

Mr Marc Twining (Employee)

AusIMM

Member

Tunkillia Mineral Resource

Mr Ian Taylor (Consultant)

AusIMM

Fellow

Challenger Mineral Resource

Mr Dale Sims (Consultant)

AusIMM / AIG

Fellow / Member

The information relating to historic Exploration Results and Mineral Resources in this announcement is extracted from the Company’s Prospectus dated 14 May 2021 or as otherwise noted in this announcement, available from the Company’s website at www.bartongold.com.au or on the ASX website www.asx.com.au. The Company confirms that it is not aware of any new information or data that materially affects the Exploration Results and Mineral Resource information included in previous announcements and, in the case of estimates of Mineral Resources, that all material assumptions and technical parameters underpinning the estimates, and any production targets and forecast financial information derived from the production targets, continue to apply and have not materially changed. The Company confirms that the form and context in which the applicable Competent Persons’ findings are presented have not been materially modified from the previous announcements.

* Refer to Barton Prospectus dated 14 May 2021 and ASX announcement dated 4 March 2025. Total Barton JORC (2012) Mineral Resources include 909koz Au (30.8Mt @ 0.92 g/t Au) in Indicated category and 799koz Au (33.2Mt @ 0.75 g/t Au) in Inferred category, and 3,070koz Ag (34.5Mt @ 2.80 g/t Ag) in Inferred category as a subset of Tunkillia gold JORC (2012) Mineral Resources.

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