Great Southern Mining Extends Mon Ami Gold with 16m at 3.37 g/t Intercept

Mon Ami Resource Grows with Significant Depth Extensions

Great Southern Mining (ASX:GSN) has unveiled assay results from the first six holes of a 16-hole reverse circulation (RC) drilling program at its wholly owned Mon Ami Gold Project, situated 12km south of Laverton, Western Australia. The drilling campaign has successfully pushed the boundaries of known mineralisation, extending the deposit by up to 70 metres down dip and 55 metres down plunge.

The highlight is a 16-metre intercept grading 3.37 grams per tonne (g/t) gold from 178 metres depth, including higher-grade runs of 4 metres at 8.54 g/t and 2 metres at 6.86 g/t, recorded in hole 26MARC001. Other notable intercepts include 19 metres at 1.12 g/t from 213 metres and 6 metres at 1.83 g/t from 150 metres, underscoring the presence of substantial, continuous mineralisation at depth.

Strategic Location and Advanced Permitting Bolster Development Prospects

The Mon Ami deposit currently holds a JORC (2012) Mineral Resource of 1.56 million tonnes at 1.11 g/t gold, equating to 55,500 ounces. It sits on a granted mining licence with several critical permits already secured, including archaeological, flora and fauna surveys, and metallurgical studies, positioning it as a near-term development opportunity.

Its proximity to multiple operational and planned gold processing plants within a 50-kilometre trucking radius in the Laverton District adds strategic value, potentially enabling cost-effective toll treatment options. This logistical advantage was emphasised by Managing Director Matthew Keane, who noted the deposit's advanced permitting and the encouraging depth extensions as key positives.

Geological Setting and Analogues Support Further Exploration

Mon Ami lies on the Barnicoat Shear Zone, a prolific structural corridor that hosts several significant deposits, including the nearby Ida H mine. The mineralisation is hosted primarily on the hanging wall contact between metasedimentary rocks and basalt sequences, with a main near-vertical lode dipping approximately 85 degrees west.

The Ida H mine, located just 8 kilometres north, produced high-grade underground gold ounces historically, providing a compelling analogue for Mon Ami’s potential at depth. The current drilling results suggest the mineralisation remains open down-dip, down-plunge, and vertically, warranting further step-out drilling.

Pending Results at Blanc Platt and Golden Boulder Targets

Alongside Mon Ami, Great Southern Mining awaits assay results from 10 holes drilled at the Blanc Platt target to the north, where previous aircore drilling hinted at a repeat lode with intercepts such as 2 metres at 1.86 g/t gold. These assays are expected within the next fortnight and could reveal additional resource growth.

Further afield within the Duketon Gold Project, assays are also pending for 38 holes completed at the Golden Boulder discovery, with results anticipated in the coming weeks. Drilling continues at the Amy Clarke discovery, where a maiden RC program is underway, and diamond drilling progresses at the Mt Dillon target in Queensland, part of a joint venture with Goldfields.

Ongoing Drilling Campaigns Maintain Momentum

Great Southern Mining is actively advancing multiple projects with a steady flow of drilling results expected over coming months. The company’s aggressive exploration strategy, supported by a recent $4.6 million capital raise, is focused on expanding known resources and unlocking new discoveries across its Western Australian and Queensland tenements.

Mon Ami’s substantial extensions and strategic location enhance its profile as a development-ready asset, while the broader drilling programs at Blanc Platt, Golden Boulder, Amy Clarke, and Mt Dillon offer multiple catalysts for future growth.