Tunkillia Infill Drilling Delivers More High-Grade Assays

Broadest intersections yield some of the highest grades received HIGHLIGHTSLatest assays from ~40,000m Tunkillia 'Phase 2' reverse circulation (RC) Resource upgrade drilling infill southern end of main 'Area 223' optimised open pit, significant assays include:Hole IDIntervalIncluding:TKB049913m @ 5.01 g/t Au from 55m depth3m @ 15.8 g/t Au from 62m depthTKB053617m @ 3.09 g/t Au from 100m depth1m @ 8.90 g/t Au from 102m depth, and1m @ 36.9 g/t Au from 108m depthTKB05704m @ 7.60 g/t Au from 95m depth1m @ 27.2 g/t Au from 95m depthTKB057227m @ 1.89 g/t Au from 33m depth5m @ 5.55 g/t Au from 49m depthTKB057321m @ 1.65 g/t Au from 93m depth2m @ 11.67 g/t Au from 102m depthTKB057419m @ 2.87 g/t Au from 137m depth (EOH)6m @ 7.18 g/t Au from 143m depth'Phase 1' and 'Phase 2' assays to-date have infilled highest value S1 and S2 pit areas (central Area 223) with high-grade intersections and identified broader and higher-grade extensions of Area 51 pit area1Tunkillia Pre-Feasibility Study (PFS) recently launched with GR Engineering (GRES), targeting Q1 CY27 completion to accommodate expanded drilling and prospective Minerals Resources upside in study2ADELAIDE, AUSTRALIA / ACCESS Newswire / July 5, 2026 / Barton Gold Holdings Limited (ASX:BGD)(OTCQB:BGDFF)(FRA:BGD3) (Barton or Company) is pleased to announce the further assays from its expanded 'Phase 2' upgrade drilling at its South Australian Tunkillia Gold Project (Tunkillia). These come from the southern zone of the main 'Area 223' optimised open pit.These assays include broad intersections which infill the currently modelled Area 223 mineralisation, with the broadest intersections also yielding some of the highest grades contained in this batch of assay results.Further assays are expected to be reported from this area in due course, with the recently expanded Tunkillia drilling program targeting further extensions and higher-grade mineralisation upside.3 After all results have been received Barton will then prepare comprehensive and representative cross sections of assay results.Full details can be accessed in the complete announcement on the ASX website or directly by clicking here.Commenting on the new Tunkillia assay results, Barton Managing Director Alexander Scanlon said:"We are pleased to confirm that Tunkillia continues to deliver broad, high-grade intersections in key areas. New assays from the southern Area 223 optimised open pit include some of the highest grade assays received to date in this zone."We look forward to completing our expanded 'Phase 2' upgrade drilling as quickly as possible, so that we can move on to Mineral Resources upgrades, the completion of our PFS and the submission of our Mining Lease application."1Refer to ASX announcements dated 2 / 16 December 2025, and 21 January, 16 March, 27 May and 16 June 20262Refer to ASX announcement dated 22 June 20263Refer to ASX announcement dated 16 June 2026Alexander ScanlonManaging Directora.scanlon@bartongold.com.au+61 425 226 649Jade CookCompany Secretarycosec@bartongold.com.au+61 8 9322 1587About Barton GoldBarton 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 Project313koz Au + fully permitted Central Gawler Mill (CGM)Tarcoola Gold Project20koz Au in fully permitted open pit mine near CGMTolmer discovery grades up to 84g/t Au & 17,600g/t AgTunkillia Gold Project1.6Moz Au & 3.1Moz Ag JORC Mineral ResourcesCompetitive 120kozpa gold & 250kozpa silver projectWudinna Gold Project279koz Au project located southeast of TunkilliaSignificant optionality, adjacent to main highway Competent Persons Statement & Previously Reported InformationThe 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 qualify as a Competent Person as defined in the JORC Code 2012 (JORC).ActivityCompetent PersonMembershipStatusTarcoola Mineral Resource (Stockpiles)Dr Andrew Fowler (Consultant)AusIMMMemberTarcoola Mineral Resource (Perseverance Mine)Mr Ian Taylor (Consultant)AusIMMFellowTarcoola Exploration Results (until 15 Nov 2021)Mr Colin Skidmore (Consultant)AIGMemberTarcoola Exploration Results (after 15 Nov 2021)Mr Marc Twining (Employee)AusIMMMemberTunkillia Exploration Results (until 15 Nov 2021)Mr Colin Skidmore (Consultant)AIGMemberTunkillia Exploration Results (after 15 Nov 2021)Mr Marc Twining (Employee)AusIMMMemberTunkillia Mineral ResourceMr Ian Taylor (Consultant)AusIMMFellowChallenger Mineral Resource (above 215mRL)Mr Ian Taylor (Consultant)AusIMMFellowChallenger Mineral Resource (below 90mRL)Mr Dale SimsAusIMM / AIGFellow / MemberWudinna Mineral Resource (Clarke Deposit)Ms Justine TraceyAusIMMMemberWudinna Mineral Resource (all other Deposits)Mrs Christine StandingAusIMM / AIGMember / MemberThe 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, 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. In accordance with ASX Listing Rule 5.19.2, the Company further confirms that the material assumptions underpinning any production targets and the forecast financial information derived therefrom 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.Cautionary Statement Regarding Forward-Looking InformationThis document may contain forward-looking statements. Forward-looking statements are often, but not always, identified by the use of words such as "seek", "anticipate", "believe", "plan", "expect", "target" and "intend" and statements than an event or result "may", "will", "should", "would", "could", or "might" occur or be achieved and other similar expressions. Forward-looking information is subject to business, legal and economic risks and uncertainties and other factors that could cause actual results to differ materially from those contained in forward-looking statements. Such factors include, among other things, risks relating to property interests, the global economic climate, commodity prices, sovereign and legal risks, and environmental risks. Forward-looking statements are based upon estimates and opinions at the date the statements are made. Barton undertakes no obligation to update these forward-looking statements for events or circumstances that occur subsequent to such dates or to update or keep current any of the information contained herein. Any estimates or projections as to events that may occur in the future (including projections of revenue, expense, net income and performance) are based upon the best judgment of Barton from information available as of the date of this document. There is no guarantee that any of these estimates or projections will be achieved. Actual results will vary from the projections and such variations may be material. Nothing contained herein is, or shall be relied upon as, a promise or representation as to the past or future. Any reliance placed by the reader on this document, or on any forward-looking statement contained in or referred to in this document will be solely at the readers own risk, and readers are cautioned not to place undue reliance on forward-looking statements due to the inherent uncertainty thereof.*Refer to Barton Prospectus dated 14 May 2021 and ASX announcement dated 8 September 2025. Total Barton JORC (2012) Mineral Resources include 1,049koz Au (39.7Mt @ 0.82 g/t Au) in Indicated category and 1,186koz Au (40.2Mt @ 0.92 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.SOURCE: Barton Gold Holdings LimitedView the original press release on ACCESS Newswire

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