Duketon Mining Launches Barlee Drilling as Nickel Resources Surpass 100,000 Tonnes

Barlee Gold Project Drilling Commences on Large Anomalies

Duketon Mining Limited (ASX:DKM) has embarked on its first-ever drilling program at the Barlee Gold Project, located 230 kilometres north of Southern Cross in Western Australia. The campaign, comprising approximately 4,000 metres of aircore and 1,500 metres of reverse circulation (RC) drilling, is testing six high-priority gold-in-soil anomalies identified in 2025, including the standout Astro Prospect with a 1,800m by 800m anomaly peaking at 204ppb gold.

Initial drill holes have intersected sheared mafic and felsic lithologies, geological settings often favourable for gold mineralisation. The program also targets other significant prospects such as Tiger and Gromit, with anomalies up to 235ppb gold, and Lost Bolt, where drilling focuses on the western margin adjacent to the Clampton Fault, an area previously untested.

This drilling campaign follows the recent maiden 5,500m drilling program underway at Barlee Gold Project, reinforcing Duketon’s commitment to unlocking the potential of these large-scale gold anomalies. An infill aeromagnetic survey was also commissioned during the quarter to refine structural interpretations, with results pending.

Boodanoo Project RC Drilling Completed, Assays Awaited

At the Boodanoo Gold Project, approximately 80km northeast of Paynes Find, Duketon completed an 800-metre RC drilling program across twelve holes targeting extensive gold anomalies identified through soil sampling. These anomalies span over 650 metres strike with widths up to 190 metres, mapped over a 2-kilometre strike length. Assay results are awaited, expected to provide further clarity on the project's gold potential.

Nickel Resources at Rosie and C2 Exceed 100,000 Tonnes

Beyond gold, Duketon maintains a substantial nickel portfolio at the Duketon Nickel Project, 130 kilometres north of Laverton. The Rosie deposit boasts an Indicated and Inferred Mineral Resource Estimate (MRE) of 2.77 million tonnes at 3.27% nickel equivalent, containing over 56,000 tonnes of nickel and significant quantities of copper, cobalt, and platinum group elements (PGEs).

The C2 deposit adds another 8.06 million tonnes at 0.57% nickel, predominantly Indicated, bringing the combined nickel resource across the Bulge Complex to more than 102,500 tonnes of nickel, alongside 14,163 tonnes of copper and 254,712 ounces of PGEs. Mineralisation remains open in all directions, suggesting further upside potential.

Duketon’s ongoing strategy includes expanding these nickel resources through targeted studies and exploration, alongside pursuing new tenure and early-stage opportunities across its portfolio.

Corporate and Financial Position

On the corporate front, the company appointed Richard Bevan as a non-executive director following Heath Hellewell’s resignation. Bevan brings extensive leadership experience from his roles at Cassini Resources and other listed companies.

Financially, Duketon reported a solid cash and liquid asset position of A$10.8 million at 31 March 2026, comprising A$8.8 million in cash and A$2.0 million in listed equity holdings. Exploration expenditure for the quarter was $305,000, reflecting active field programs and geological consultancy. No mining production activities occurred during the period.