Great Southern Mining (ASX:GSN) has commenced diamond drilling at the Mt Dillon target within its Edinburgh Park Project in northern Queensland, testing an intrusive-related gold system prospect.
The initial program comprises up to 1,300m across two planned holes targeting shallow chargeability and resistivity anomalies identified through induced polarisation (IP) surveys conducted in 2025.
Mt Dillon sits beneath a prominent topographic feature interpreted as a preserved lithocap, consistent with intrusive-related gold systems.
Exploration is managed and funded by G-Ex Resources, a wholly owned subsidiary of Gold Fields, under an earn-in joint venture where Gold Fields can spend up to $15 million to earn a 75% interest.
The drilling program is expected to take four to six weeks.
Managing Director Matthew Keane says Mt Dillon represents the ‘highest-priority target defined to date’ at Edinburgh Park.
“The Mt Dillon target contains a number of compelling attributes including shallow IP anomalies below a preserved lithocap and multi-element anomalies consistent with epithermal and/or intrusion-related systems,” Keane says.
The target exhibits several square kilometres of intensely altered felsic volcanics with phyllic to advanced argillic alteration typical of large intrusive systems.
Surface mapping reveals strong clay-pyrite-silica alteration with abundant sulphides at 3–10% concentrations.
IP surveys conducted in early 2025 delineated a large-scale chargeability anomaly approximately 200–300m below surface, with a resistivity anomaly sitting beneath it.
Edinburgh Park encompasses 1,447km2 within northern Queensland’s established goldfields region, approximately 100km southeast of Townsville.
The two planned diamond holes will test the chargeability anomaly, with hole depths of 575m and 700m.
Great Southern Mining holds a portfolio of gold and base metals projects across Western Australia and Queensland, including the Edinburgh Park project in the Mt Carlton region.
Write to JC Villarba at Mining.com.au
Images: Great Southern Mining
