Great Southern Mining Limited advised that drilling will commence this week at the Company's 100% owned East Laverton Nickel Project ("East
Laverton"), located approximately 35km east of the town of Laverton. This drilling campaign will test two bedrock electromagnetic ("EM") conductors within the Diorite Hill Intrusive Complex ("Diorite Hill"), which are considered prospective for magmatic intrusive style nickel-copper-PGE mineralisation. The conductors were identified in a ground based moving loop EM ("MLEM") survey in 2021 and refined with a follow-up fixed loop EM (FLEM) survey in early 2022. Geophysical surveys and drilling of Diorite Hill represent stage one of the Company's exploration strategy for East Laverton. The next stage will target approximately 17km of ultramafic stratigraphy along the Granite Well and Rotorua trends, which are considered prospective for Kambalda style komatiite host nickel mineralisation. EM surveys covering prospective geology are planned for early-2023. Despite the presence of anomalous nickel in historic gold-focussed drilling, neither Diorite Hill nor the Granite Well trends have been previously targeted for nickel exploration. The Rotorua trend remains virtually undrilled to date. The Diorite Hill Intrusive Complex covers an area of approximately 110km² and consists of a
cumulate rock sequence of interlayered peridotites, pyroxenites, gabbros and anorthosite up to 7km thick. The intrusion is considered prospective for several styles of nickel-copper-PGE mineralisation, including contact style (i.e. Chalice Mines' Julimar deposit), conduit style (i.e. IGO Group's Nova-
Bollinger deposit) and reef style (i.e. Merensky Reef in South Africa). There is very little outcrop exposure at Diorite Hill, so geological interpretation is largely derived from either geophysics or drilling. The vast majority of historic drilling is either shallow rotary air blast ("RAB") or aircore ("AC") targeting gold and/or PGEs, with only five diamond drill holes drilled to date. Ground based EM surveys conducted by GSN in 2021-2022 identified two conductive targets within the Granite Hill complex. The first conductor, L076, is located on or near the southern boundary the intrusion in a position considered favourable for contact or conduit style sulphide mineralisation. This conductor will be drilled with a diamond tailed RC hole to a downhole depth of approximately 600m. The second conductor, L124, is more discrete and interpreted to be on the basal contact of an ultramafic unit, which looks to be the lowermost unit within a sequence of layered intrusive stratigraphy. L124 is considered prospect for reef style sulphide mineralsiation. Shallow drill holes within the vicinity of this ultramafic contact have intercepted anomalous nickel as well as anomalous platinum and palladium (including 4m at 0.45% Ni in RAB hole DRA0004 and 0.5m at 153ppm Pd & 10ppb Pt in diamond hole DIORCDD121). Diamond hole DIORCDD123 intercepted 6.2m at 1.8% Ni from 46.8m within the oxide zone proximal to conductor L124. The East Laverton Nickel Project also contains approximately 17km of virtually unexplored ultramafic stratigraphy along the Granite Well and Rotorua trends. These are considered prospective for Kambalda style komatiite hosted nickel mineralisation. The Granite Well trend comprises of 10km of interpreted komatiitic ultramafic stratigraphy immediately west of the Diorite Hill intrusion, of which ~3km of strike is within GSN's tenure. Limited exploration has targeted Granite Well, however hole 94GWR245 on a neighbouring tenement to the north intercepted anomalous and coincident copper-nickel sulphides (20m @ 0.28% Cu, 0.11% Ni from 12m, including 4m @ 0.34% Cu, 0.16% Ni). In addition, multiple holes along this trend have nickel values above 0.2% with no drilling on the 3km portion of GSN's tenure. The Rotorua ultramafic trend consists of a 14km long ultramafic sequence extending south from the Diorite Hill intrusion. No historical nickel focussed exploration has been conducted over Rotorua, however limited shallow gold focussed AC drilling on the western margin of the ultramafic stratigraphy showed anomalous nickel (0.2-0.3% Ni) in base of holes samples. Drillhole RRLBVAC054 was also assayed for Platinum and Palladium with a peak value of 115ppb Pd+Pt. The presence of komatiitic spinifex textures were also noted in base of hole logging.