Western Mines Group seeks out numerous ‘exciting’ follow-up targets in phase two drilling at Mulga Tank

Western Mines Group (ASX:WMG) has started a phase two diamond drilling program at its flagship Mulga Tank Ni-Cu-PGE Project, on the Minigwal Greenstone Belt, in Western Australia’s Eastern Goldfields.

The company reports that numerous ‘exciting’ follow-up targets have been identified, along with 2 deep co-funded Exploration Incentive Scheme (EIS) holes that will be tested with a minimum 6-hole 4,000-5,000m diamond drilling program.

The drilling is expected to take until the end of March or early April 2023  with a 3-4 week break over Christmas and New Year.

Western Mines Group notes further technical work, including mineralogical section analysis, has recently been completed on drill core from the first program.

This work confirms the abundance of high-tenor disseminated pentlandite (up to 38% Ni recorded by Scanning Electron Microscope (SEM)) in samples from hole MTD020, with minimal pyrrhotite and pyrite observed.

In addition, Western Mines says this supports the near identical nickel assay results by four acid versus aqua regia digest suggesting a high percentage of nickel in sulphide form versus silicate nickel.

This has very positive implications for the potential of an extensive working mineral system for Type 2 Mt Keith-style disseminated nickel sulphide mineralisation.

The mineralogical section works also confirmed high-tenor pentlandite and millerite in the sulphide veining seen in holes MTD012, MTD013 and MTD016, supporting the conclusion that these are likely remobilised from a nearby massive sulphide source.

The company notes this again, is offering positive implications for the potential for Type 1 Perseverance-style massive nickel sulphide mineralisation at the project.


Commenting on the phase two drilling, WMG Managing Director Dr Caedmon Marriott says: “Our phase two diamond drilling program commenced a few days earlier than expected at the end of last week reflecting how keen the guys were to get out and get cracking! Great work by Bluespec and the WMG team.

There’s some exciting holes planned, along with the deep EIS holes, which should hopefully generate a tremendous amount of further knowledge of the Mulga Tank system.

Technical Director Dr Ben Grguric has helped complete some very interesting thin section work which confirms abundant pentlandite through-out the system – both as disseminated interstitial blebs in hole MTD020 and in remobilised veins. We’re growing in confidence when talking about an extensive working nickel sulphide mineral system throughout the Mulga Tank Ultramafic Complex.”

The targets and drill holes selected for phase two are based on a combination of geophysical modelling of recent DownHole Electromagnetic (DHEM) results and previous Moving Loop Electromagnetic (MLEM) results along with geological interpretation of the complex and geochemical vectoring work.

Meanwhile, WMG has recently completed mineralogical thin section work to help characterise the rock types and sulphide species observed during the phase one drilling program.

This work has been led by the company’s Technical Director Dr Ben Grguric. Samples of core were collected and prepared from holes MTD012, MTD013, MTD016, and MTD020.

Western Mines is a mineral exploration company driven by the goal to create significant investment returns through exploration and discovery of high-value gold and nickel sulphide deposits across a portfolio of ‘highly prospective’ projects located on major mineral belts of Western Australia.

Its flagship project and current primary focus is the Mulga Tank Ni-Cu-PGE Project, a major dunite intrusive found on the under-explored Minigwal Greenstone Belt. Previous work shows significant evidence for a working sulphide mineral system and is considered ‘highly prospective’ for Ni-Cu-PGE mineralisation.

The company has a diversified portfolio of other projects including its primary gold project is Jasper Hill, where WMG has strategically  consolidated a 3km mineralised gold trend with walk-up drill targets.

Write to Adam Orlando at Mining.com.au

Images: Western Mines Group Ltd
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Written By Adam Orlando
Mining.com.au Editor-in-Chief Adam Orlando has more than 20 years’ experience in the media having held senior roles at various publications, including as Asia-Pacific Sector Head (Mining) at global newswire Acuris (formerly Mergermarket). Orlando has worked in newsrooms around the world including Hong Kong, Singapore, London, and Sydney.