Edinburgh Park’s New IP Target Raises Stakes Ahead of 2025 Drilling Campaign

A New Chapter at Edinburgh Park

Great Southern Mining Limited (ASX: GSN) has announced the identification of a second large-scale induced polarisation (IP) anomaly within its Edinburgh Park Project in Northern Queensland. This new target, located at the Mt Dillon prospect, complements the previously reported large-scale anomaly at Leichhardt Creek, reinforcing the project's potential as a significant gold-copper exploration frontier.

The Mt Dillon anomaly is characterised by a shallow, extensive chargeability response detected approximately 200 to 300 metres below surface. It lies beneath a silicified lithocap exhibiting advanced argillic alteration over several square kilometres, a geological signature often associated with preserved porphyry systems. The geophysical data also reveal a resistive anomaly beneath the chargeable zone, interpreted as pervasive hydrothermal alteration, further evidence supporting the prospectivity of this target.

Geological Context and Exploration Synergies

Both Mt Dillon and Leichhardt Creek anomalies are interpreted as large-scale intrusive-related systems, potentially hosting porphyry gold-copper and epithermal gold deposits. The Mt Dillon target's alteration assemblage, dominated by clay, pyrite, and silica, and its magnetic low signature align with global analogues where significant mineralisation occurs beneath lithocaps, such as Quebradona in Colombia and Valeriano in Chile.

Great Southern Mining’s Managing Director, Matthew Keane, emphasised the compelling nature of these targets, citing coincident geochemical anomalies, favourable structural settings, and proximal gold-bearing breccia pipes. These factors collectively enhance the likelihood of discovering economically viable mineralisation.

Partnership and Progress Towards Drilling

The Edinburgh Park Project is operated under a joint venture with Gold Fields Ltd, which holds an option to earn a 75% interest by funding up to A$15 million in exploration. The partnership has facilitated a comprehensive exploration program, including ongoing gradient array IP surveys, helicopter-borne aeromagnetic surveys, and detailed geological mapping led by porphyry specialist Nick Tate.

Importantly, an Early Works Agreement has been executed with the Juru People, the recognised traditional owners of the northern tenements. This agreement ensures heritage protection and community engagement during exploration activities, including the upcoming drilling campaign.

Drilling is scheduled to commence in the June quarter of 2025, contingent on the conclusion of the northern Queensland wet season and completion of heritage and environmental surveys. The initial focus will be on testing the Mt Dillon and Leichhardt Creek anomalies, with the potential for further targets to emerge from ongoing surveys.

Strategic Implications and Outlook

The discovery of a second large-scale IP anomaly at Edinburgh Park significantly enhances the project's exploration profile. It underscores the geological potential of the New England Orogen region, which hosts several major gold and base metal deposits. The proximity to established mining operations, such as the Mt Carlton high sulphidation epithermal mine, adds logistical advantages.

While the geophysical and geochemical data are promising, the true test will come with drilling results. Success could position Great Southern Mining as a key player in Queensland’s evolving mineral landscape, attracting further investment and potentially unlocking a new tier of mineral resources.