GoldArc Resources Limited (ASX: GA8) — Mt Stirling Well Delivers Strongest Results to Date as Mine Planning Advances Towards MDCP Approval

7 July 2026

Price Sensitive Announcement $

Highlights:

• Third batch of grade control results from Mt Stirling Well delivers the deposit’s strongest results to date, including:
  • 4m @ 9.24g/t Au from 16m including 1m @ 27.5g/t Au from 18m (26BSWRC1021)
  • 2m @ 15.5g/t Au from 18m including 1m @ 25.5g/t Au from 19m (26BSWRC1024)
  • 2m @ 9.75g/t Au from 18m including 1m @ 18.7g/t Au from 18m (26BSWRC1039)
• Multiple intercepts above 7g/t Au confirm the presence of high-grade shoots at Mt Stirling Well, consistent with the deposit’s 2.3g/t Au JORC Inferred Resource grade
• Eighth batch of Mt Stirling results covers the eastern edge and western upper zone, returning narrow, elevated intercepts including 2m @ 8.11g/t Au from 4m (BMLRC697) and 2m @ 5.94g/t Au from 1m (BMLRC708)
• First phase of grade control drilling at Mt Stirling is now largely complete, with results informing updated mining models and mine planning in preparation for the anticipated approval of the Mining Development and Closure Proposal (MDCP)
• Approximately 23,654m of the 34,000m combined program is now complete (~70%), with focus shifting to Mt Stirling Well grade control coverage and mine planning at Mt Stirling
• The entire 34,000m grade control program is fully funded by BML Ventures under a 50/50 net profit share arrangement, with GoldArc retaining 100% ownership of both deposits

Overview:

GoldArc Resources has delivered its strongest batch of grade control results to date from the Mt Stirling Well deposit, with multiple high-grade intercepts confirming the presence of well-defined gold shoots consistent with the deposit’s 2.3g/t Au resource model — and adding further confidence to the Leonora North development scenario.

The standout result, hole 26BSWRC1021, returned 4m @ 9.24g/t Au from 16m including 1m @ 27.5g/t Au, while 26BSWRC1024 added 2m @ 15.5g/t Au from 18m including 1m @ 25.5g/t Au. These near-surface, high-grade intercepts from a further 50 holes for approximately 1,369m at Mt Stirling Well are hosted within narrow, flat-dipping quartz veins in a granitoid host — a structurally distinct setting from the Hydra Fault-controlled mineralisation at the adjacent Mt Stirling deposit approximately 700m to the northeast.

At Mt Stirling itself, the eighth batch of results covers the eastern edge and western upper zone — the deposit margins and upper benches where mineralisation is characteristically narrower than the broad central envelope reported in prior rounds. Results from this batch, covering 40 holes for 688m, are consistent with this geological setting, returning narrow, elevated-grade intervals informative for mine boundary definition and ore-waste discrimination in these sectors.

With the first phase of grade control drilling at Mt Stirling now largely complete, the focus is firmly shifting toward mine planning. GoldArc and BML Ventures are progressing updated mining models using the grade control dataset in preparation for the anticipated approval of the Mining Development and Closure Proposal — the regulatory approval required before mining operations can commence at Mt Stirling. Subject to MDCP approval, the partnership anticipates advancing to mining at Mt Stirling, with Mt Stirling Well results also expected to contribute to broader Leonora North development planning.

Company Notes:

GoldArc Resources Managing Director, Paul Stephen, commented: “The Mt Stirling Well results in this batch are the strongest we’ve seen from that deposit. Intercepts like 4m at 9.24 g/t Au and 2m at 15.5 g/t Au are encouraging and consistent with the 2.3 g/t Au resource grade, they give us confidence that grade control coverage at Stirling Well is tracking well. At Mt Stirling, with the first phase of grade control substantially complete, our focus is shifting to the mine planning work that will support the MDCP approval process. We’re working closely with BML Ventures on that, and we look forward to updating the market as the process advances.”

About GoldArc Resources Limited (ASX: GA8):

GoldArc Resources is an ASX-listed gold exploration and development company advancing the Mt Stirling and Mt Stirling Well deposits within its Leonora North hub in Western Australia. The Company’s 34,000m RC grade control program — fully funded by BML Ventures under a 50/50 net profit share arrangement — is systematically defining ore grades and boundaries across both deposits ahead of potential open-pit mining, with GoldArc retaining 100% ownership. Mine planning is now advancing at Mt Stirling in preparation for MDCP approval, the final regulatory step before mining operations can commence.

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