Western Mines Group completes deepest hole to date at Mulga Tank, WA

Mineral explorer Western Mines Group (ASX:WMG) has completed the deepest hole ever drilled at its flagship Mulga Tank nickel-copper-platinum group elements (Ni-Cu-PGE) Project in Western Australia. 

The company says hole MTD026 was completed to a final depth of 1,548.3m and intersected a cumulative 1,400m thickness of high MgO adcumulate dunite ultramafic containing disseminated nickel sulphide mineralisation and numerous remobilised sulphide veinlets over 950m.

Western Mines reports the hole also demonstrates very similar geological observations to hole MTD023, located 1km to the northeast. However it demonstrates ‘richer’ visible sulphide mineralisation, highlighting ‘very positive’ implications for the prospectivity of the project and ongoing exploration targeting. 

Additionally, both of these holes appear to validate the company’s lopolith-shaped geological model for the Mulga Tank ultramafic complex and suggest a maximum vertical depth of 1,400-1,450m in the centre of the complex. 

Meanwhile, the company notes it has engaged Expert Geophysics to undertake a MobileMT survey across the entire Mulga Tank Complex in early August to further unlock the 3D architecture and targeting accumulations of massive nickel sulphide.  

Addressing the completion of the drillhole, Western Mines Group Managing Director Dr. Caedmon Marriott says: “Hole MTD026 is our second successful EIS deep hole into the Mulga Tank Complex. 

The hole showed remarkable similarities to hole MTD023 but overall seemed to be richer in sulphide mineralisation, particularly in the last 50-70m approaching the basal contact. These holes validate our geological model of the complex and demonstrate a significant working nickel sulphide mineral system with a large footprint over some 3.2km. 

Hole MTD026 is our second successful EIS deep hole into the Mulga Tank Complex.” 

The company looks forward to the upcoming MobileMT survey at the project, part of our systematic exploration strategy to unlock further knowledge of the Mulga Tank Complex. The extensive geological information gained from the EIS holes through the centre of the complex will be extremely valuable in modelling the MobileMT results. 

This cutting-edge technology is capable of deep 3D geoelectrical mapping of resistivity and conductivity down to 1km and we hope may be well-suited to directly detecting deep massive sulphide targets at the project. WMG is next in line after Expert Geophysics completes Estrella’s Carr Boyd survey.” 

With hole MTD026 now complete, Western Mines Group announces it has also engaged a downhole electromagnetic (DHEM) crew with a 2km-long winch to survey holes MTD025 and 026 to search for off-hole conductor anomalies that could be permissive for basal massive sulphide accumulations. 

The current diamond drilling program is still ongoing at Mulga Tank, with the drill rig having moved onto drill planned hole MTP026 located on the eastern side of the complex in an area with no previous drilling.  

Western Mines Group is an ASX-listed company working to explore and discover high-value gold and nickel sulphide deposits across a portfolio of highly prospective projects located on major mineral belts of Western Australia. 

The company’s Mulga Tank project is located on the under-explored Minigwal Greenstone Belt and represents the frontier exploration play for major Ni-Cu-PGE deposits under cover within this overlooked portion of the eastern Yilgarn Craton. 

As of April 2023, Western Mines Group had $4.03 million cash on hand.

Write to Adam Drought at Mining.com.au

Images: Western Mines Group Ltd
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Written By Adam Drought
Born and raised in the UK, Adam is a sports fanatic with an interest in Rugby League and UFC/MMA. When not training in Muay Thai and Brazilian Jiu Jitsu, Adam attends Griffith University where he is completing his final year of a Communication & Journalism degree.