Miramar Doubles Gidji JV Gold Exploration Target Near Kalgoorlie

29 June 2026 | Western Australia - Miramar Resources has announced a significant increase to the Exploration Target at its 80%-owned Gidji JV Gold Project, located around 15km north of Kalgoorlie in Western Australia.

The company said the updated Gidji JV Gold Exploration Target has more than doubled, based on recent drilling and assay data across multiple targets.

The updated Exploration Target now stands at 6.19Mt to 7.56Mt for 124,871 to 325,125 ounces of contained gold. Miramar said the estimate covers several target areas, including Marylebone, Powerline, Blackfriars, Highway, Railway and Roaster.

The largest target area is Highway, which has an estimated range of 2.25Mt to 2.75Mt at 0.7 g/t to 1.5 g/t gold, for 50,561 to 132,421 ounces of contained gold.

Miramar said the updated Exploration Target is based on actual drilling data, including 939 aircore holes for 53,362m, 26 RC holes for 4,007m and one diamond hole for 190.75m, together with limited historical drilling data.

Managing Director Marion Bush said the update was an important milestone as Miramar progresses the project toward potential development. She said the project’s location near Kalgoorlie, the Goldfields Highway and nearby gold processing plants creates multiple options to potentially monetise the shallow gold discovered to date.

Why it matters: Gidji is well located in one of Australia’s most established gold mining regions. The project sits close to existing infrastructure, roads, processing plants and nearby mining operations, which could be important if Miramar is able to convert the Exploration Target into a JORC-compliant Mineral Resource.

The company said planned activities now include Resource estimation and preparation for a Mining Lease application over the main mineralised areas under the Gidji Paleochannel.

Miramar has engaged a resource geologist to review the drilling data with a view to estimating one or more JORC-compliant Mineral Resources and advising on any required infill drilling.

The company is also in the early stages of discussions with potential development partners.

Beyond the shallow supergene gold already outlined, Miramar said there remains potential for additional mineralisation through deeper drilling. The company noted that average drilling depth across the project remains less than 60m, with limited deeper RC and diamond drilling completed to date.

Miramar believes the shallow supergene gold mineralisation may have come from one or more nearby bedrock sources. The company also sees potential for further supergene mineralisation outside the Gidji Paleochannel in areas that remain largely untested.

The Gidji JV Project contains approximately 15km of strike along the Boorara Shear Zone, which hosts several gold deposits along strike in both directions. Miramar said the project has been underexplored due to extensive shallow transported cover and the presence of the Gidji Paleochannel.

For Western Australia’s gold sector, the Gidji update adds another near-Kalgoorlie exploration and potential development story, with shallow gold targets, possible bedrock upside and a clear pathway toward Resource estimation.

Miramar cautioned that the Exploration Target remains conceptual in nature, with insufficient drilling completed to estimate a Mineral Resource at this stage. It is uncertain whether further exploration will result in the estimation of a JORC-compliant Mineral Resource.

Source: Miramar Resources ASX announcement, “Significant Increase to Gidji JV Gold Exploration Target”, 29 June 2026.