Great Southern Mining Limited announced that drilling has recommenced at the Company's 100% owned Duketon Gold Project in Western Australia. The first phase will comprise of ~4,000m AC drilling at the Golden Boulder prospect, situated on a prolific gold bearing trend incorporating Regis Resources' Rosemont (~1.06Moz Au), Baneygo (380koz) and Ben Hur (~390koz Au) deposits, as well as GSN's Southern Star prospect. Golden Boulder - Limited drilling below 40m depth The Golden Boulder prospect area has seen no systematic drilling to date, despite hosting up to three kilometres of historic workings.

Historic production, recorded between 1901 and 1955, was 1,761 ounces at an average grade of 28.6g/t Au. Near surface high grade gold mineralisation is hosted in quartz veins within a chlorite altered sheared basalt. The majority of drilling at Golden Boulder is limited to less than 40m below ground surface.

In 2021, GSN conducted a limited nine-hole RC drilling program along the main Golden Boulder trend, with all holes recording gold intercepts in excess of 0.5g/t Au. Better results from this program included: 5m @ 3.3 g/t Au from 49m, including 1m @ 12.3 g/t Au and 1m @ 1.2 g/t Au from 73m in 21GBRC0001, 4m @ 2.0 g/t Au from 16m and 3m @ 1.1 g/t Au from 67m, including 1m @ 2.5 g/t Au in 21GBRC0002, 8m @ 1.0 g/t Au from 40m in 21GBRC0003, 4m @ 1.8 g/t Au from 32m in 21GBRC0005. The current AC program will cover 1,300m of the Golden Boulder strike on 200m line spacing for ~4,000 drill metres.

The aim of this program is to vector in on zones of higher grade and grade continuity, and to test for a larger gold system beyond the extent of surface workings. Any success from this AC program will be followed up with RC and diamond drilling later in the year. Notably, historic workings continue further south of the current AC program, and these southernmost working are believed to cease only due to a lack of outcrop, rather than prospective geology.

Further drilling to the south will require an extension to the current heritage survey area. Next Steps: Further RC and AC drilling programs have been planned for the Southern Star, Amy Clarke and greater Golder Boulder prospects in 2023. Southern Star Prospect Gold mineralisation at the Southern Star prospect has been defined over a 700m to 800m strike extent and remains open in nearly every direction.

GSN plans to expand upon current mineralisation by testing four key areas including: Depth extensions to known mineralisation below intercepts, such as 10m @ 3.1 g/t Au, including 3m @ 8.6 g/t Au in hole 21SSRC0012. Directly north of the main mineralisation zone where geochemical surveys have delineated four gold anomalies. A 700m long geochemical anomaly to the south of the current mineralisation zone.

A parallel trend to the west, which GSN interprets to be the trend hosting Regis Resources' BenHur deposit just 3km to the north.