Barton Gold (ASX:BGD) Lifts Challenger Resource to 370koz as Underground Ounces More Than Double to 230koz

Sonal Goyal

28 October 2026 01:08 PM AEDT

Barton Gold (ASX:BGD) Lifts Challenger Resource to 370koz as Underground Ounces More Than Double to 230koz

Image Source: Shutterstock

You are reading a free article with opinions that may differ from the recommendation given by Kalkine in its paid research reports. Become a Kalkine member today to get access to our research reports, in-depth technical and fundamental research. Learn more

Start Your Free Trial Now!

Key Highlights

The Challenger underground resource more than doubled to 230koz Au at 3.65g/t, up from 89.4koz of Inferred resource in September 2025.
Total Challenger JORC (2012) resources rose to 370koz Au (11.2Mt @ 1.03g/t) from 313koz in September 2025.
Open-pittable Hub 1 resources total 169koz Au, including 62koz of fresh mineralisation and 56koz in TSF1.
Barton's group gold endowment now stands at 2.29Moz (80.4Mt @ 0.89g/t Au), with a Challenger DFS targeted for the first quarter of calendar 2027.

Barton Gold Holdings Limited (ASX:BGD) has released updated JORC (2012) Mineral Resource Estimates for its Challenger and Tarcoola gold projects in South Australia, with the two now totalling about 400,000oz of gold. The headline change is at the historical Challenger underground, where remodelling lifted resources to 230koz at 3.65g/t Au. The re-estimate draws on 9,387m of new reverse circulation and diamond drilling and a more constrained approach to open pit mineralisation.

Challenger Rises to 370koz

The new Challenger estimate totals 11.2Mt @ 1.03g/t Au for 370koz, compared with 10.6Mt @ 0.92g/t Au for 313koz reported on 8 September 2025. Within that total, 246koz (2.17Mt @ 3.53g/t Au) sits in the existing open pit and underground areas. Indicated resources now amount to 148koz, up from 122koz, while Inferred resources are 222koz, up from 191koz.

The underground above the 215mRL holds 206,800oz (1.75Mt @ 3.68g/t Au), against 89.4koz (0.98Mt @ 2.84g/t Au) previously, and 17koz of it is now classified as Indicated. Challenger Deeps, below 90mRL, is unchanged at 23,000oz (0.21Mt @ 3.50g/t Au). Barton attributed the change to remodelling after on-site review by third-party consultants, which moved some mineralisation formerly carried in the Main open pit into the underground estimate with a higher average grade. The Main open pit now stands at 13,900oz (0.20Mt @ 2.16g/t Au) and the West open pit at 2,400oz (0.01Mt @ 6.09g/t Au).

Open pit material was remodelled inside optimised shells using revenue factors of 1.2 to 1.5 at a base gold price of A$5,000 per ounce. A new Challenger 3 deposit was defined along strike of the West and Main pits and the SSW deposit, adding 8koz at 0.84g/t Au. The two tailings facilities hold 56koz in TSF1 (3.19Mt @ 0.54g/t Au) and 52koz in TSF2 (5.13Mt @ 0.31g/t Au), all in the Indicated category.

Tarcoola Stockpiles Move to Indicated

The Tarcoola estimate was revised to 29koz Au (0.53Mt @ 1.68g/t) from the 30koz (0.54Mt @ 1.70g/t) reported in July 2024. The principal change is classification: about 72 per cent is now Indicated, up from roughly 44 per cent. Stockpiles of 220kt @ 1.23g/t Au were moved from Inferred to Indicated after a review of historical production records and revised density assumptions, while the Perseverance open pit remains at 20koz.

Hub 1 Inventory and the Central Gawler Mill

Barton counts 169koz of open-pittable resources toward a potential Hub 1 operation at Challenger, including 62koz of fresh mineralisation (1.41Mt @ 1.37g/t Au, 52 per cent Indicated) and the 56koz in TSF1. Managing Director Alexander Scanlon noted that almost all of the mineralisation sits in, on or next to existing open pit and underground development, and that the mine produced more than 1 million ounces between 2002 and 2018.

A Definitive Feasibility Study is under way for a 3 to 4 year Stage 1 operation using historical higher-grade TSF1 tailings and limited near-surface material, processed through the fully permitted Central Gawler Mill, a plant of about 650ktpa. Work completed includes a condition assessment of the mill, TSF1 geotechnical and metallurgical drilling, a further 8,065m of RC and 1,322m of diamond drilling, and preliminary capital and operating cost estimates. Barton is targeting publication of the study in the first quarter of calendar 2027 and has said a review of underground development options will begin shortly, with SRK Consulting's preliminary modelling pointing to additional high-grade mineralisation.

Where the Resource Update Leaves Barton

With the October 2026 estimates, Barton's total JORC (2012) gold resources are 2.29Moz (80.4Mt @ 0.89g/t Au), and its silver resources are 3.1Moz. Challenger and Tarcoola contribute about 400koz of that gold, with the larger share now in the Challenger underground, the open pit shells and the TSF1 tailings that make up the Hub 1 inventory.

FAQs

Q: What is the updated Challenger Mineral Resource?

A: It totals 11.2Mt @ 1.03g/t Au for 370koz under JORC (2012), up from 313koz in September 2025.

Q: How much did the Challenger underground resource change?

A: It rose to 230koz Au at 3.65g/t, more than double the previous figure. The portion above 215mRL is 206,800oz (1.75Mt @ 3.68g/t Au).

Q: What changed at Tarcoola?

A: The resource was revised to 29koz Au (0.53Mt @ 1.68g/t), with about 72 per cent now Indicated. The stockpiles of 220kt @ 1.23g/t Au were reclassified from Inferred to Indicated.

Q: When is the Challenger feasibility study due?

A: Barton is targeting publication of the Definitive Feasibility Study in the first quarter of calendar 2027. It evaluates a restart using the Central Gawler Mill.

Download Free Report – Explore 3 Stock Ideas & Industry Insights

Unlock 3 stock ideas and key industry insights in our free report. This information is general in nature and does not consider your personal objectives, financial situation, or needs. It is not financial advice.

All investments involve risk—consider independent advice before making any investment decisions.

View 3 Research Reports

Disclaimer:

This article (“Article”) has been prepared by Kalkine Pty Limited (ABN 34 154 808 312) (Australian financial services licence number 425376) (“Kalkine”) and its related bodies corporate who are authorised to provide general financial product advice. Kalkine.com.au and its associated pages are published by Kalkine.

Any information/advice provided in this article is general in nature and does not take into account your objectives, financial situation or needs. You should therefore consider whether the information is appropriate for your objectives, financial situation and needs before acting upon it.

There may be a Product Disclosure Statement, Information Memorandum or other offer document (“Offer Document”) for the securities or other financial products referred to in Kalkine articles. You should obtain a copy of the Offer Document and consider it before making any decision about whether to acquire the security or financial product.

Kalkine strongly recommends that you seek advice from a financial adviser, stockbroker or other professional (including taxation and legal advice) before acting on any advice/information in this Article or on the Kalkine website. Not all investments are appropriate for all people.

The information in this Article and on Kalkine website has been prepared from a wide variety of sources, which Kalkine, to the best of its knowledge and belief, considers accurate. Kalkine has made every effort to ensure the reliability of the information contained in its articles (including this Article), newsletters and websites. All information represents our views at the date of publication and may change without notice.

The information in this Article does not constitute an offer to sell securities or other financial products or a solicitation of an offer to buy securities or other financial products.

Kalkine does not issue, sell or deal in any financial products.

This Article may contain information on past performance of particular investments. Please note past performance is neither an indicator nor a guarantee of future performance.

To the extent permitted by law, and excluding any dishonesty or gross negligence by Kalkine, Kalkine disclaims and excludes all liability for any direct, indirect, implied, punitive, special, incidental or other consequential loss or damage arising from the use of or reliance on this Article, the Kalkine website and any information published on the Kalkine website without any warranties or representations by Kalkine to you. To the extent the law prohibits or limits this exclusion, Kalkine limits its liability to the resupply of services.

Please also read our Terms & Conditions and Financial Services Guide for further information.

Employees and/or associates of Kalkine and its related entities may hold interests in the securities or other financial products covered in this Article or on the Kalkine website. Any such employees and associates are required to comply with certain safeguards, procedures and disclosures as required by law.

Some of the images/music that may be used in the Article are copyright to their respective owner(s). Kalkine does not claim ownership of any of the pictures displayed/music used in the Article unless stated otherwise. The images/music that may be used in the Article are taken from various sources on the internet, including paid subscriptions or are believed to be in public domain. We have used reasonable efforts to accredit the source wherever it was indicated or was found to be necessary.

Kalkine Media Pty Ltd, an affiliate of Kalkine Pty Ltd, may have received, or be entitled to receive, financial consideration in connection with providing information about certain entity(s) covered on its website.