What did Great Southern Mining (ASX:GSN) announce regarding its Western Australian assets?

Great Southern Mining (ASX:GSN) announced the commencement of a major 20,000-metre Reverse Circulation drilling campaign across its gold assets in Western Australia.

Why does the 20,000-metre drilling program matter for Great Southern Mining (ASX:GSN) investors?

This program is critical because it aims to aggressively expand the known scale of the company's core exploration assets. Golden Boulder and Amy Clarke currently feature large mineralisation footprints of 3.5 kilometres and 4.7 kilometres respectively, both of which remain completely open along strike and at depth.

What were the key exploration results from Great Southern Mining’s (ASX:GSN) latest diamond drill hole?

The standalone diamond drill hole at Golden Boulder hit multiple gold intercepts, including 2.25 metres at 2.04 grams per tonne (g/t) gold from 108.94 metres, which included a higher-grade zone of 0.72 metres at 4.07 g/t gold.

What is the structural significance of the Golden Boulder drilling results?

The diamond drill intersection structurally confirms that Golden Boulder represents a continuous mineralised system within a major shear zone. For traders, this reduces exploration risk because it proves the system has significant depth potential rather than being a shallow or isolated pocket.

What are the existing resources at Great Southern Mining’s (ASX:GSN) Mon Ami Gold Project?

The Mon Ami Gold Project, located south of Laverton, holds an established JORC-compliant mineral resource estimate of 1.56 million tonnes grading 1.11 g/t gold. This equates to roughly 55,500 ounces of contained gold. The upcoming drilling campaign intends to target this project alongside Golden Boulder and Amy Clarke to build on this existing resource base.

What are the main bull and bear points for Great Southern Mining (ASX:GSN) after this news?

The bull case rests on massive exploration upside, as the 20,000-metre campaign targets multi-kilometre structures that are completely open for expansion. The bear case is that Great Southern Mining remains a speculative, early-stage explorer.

Image for illustrative purposes only. Not a real photo.

Great Southern Mining launches WA gold drilling campaign

Written by Liezl GambePublished Jun 15, 2026, 6:13 AM

Great Southern Mining (ASX:GSN) commenced a major drilling campaign across its highly prospective Western Australian gold assets.

The centrepiece of the exploration push is an extensive 20,000-metre reverse circulation drilling programme scheduled to kick off this week, focusing primarily on expanding emerging discoveries at the Golden Boulder and Amy Clarke projects.

Current mineralisation footprints at Golden Boulder span over 3.5km, while Amy Clarke extends across 4.7km, with both structures remaining completely open along strike and at depth.

GSN reported results from a standalone diamond drill hole at Golden Boulder.

The hole extended the known mineralised zone by 40m down-dip, encountering notable intercepts, including 2.25m at 2.04 grammes per tonne of gold from 108.94m, which featured a higher-grade interval of 0.72m at 4.07 g/t gold.

The intersection structurally confirms that Golden Boulder represents a continuous mineralised system with significant depth potential situated within a major shear zone.

The upcoming campaign will also target the Mon Ami Gold Project, located south of Laverton, which hosts an existing JORC-compliant mineral resource of 1.56 million tonnes at 1.11 g/t gold for 55,500 ounces.

Great Southern Mining launches WA gold drilling campaign

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