Western Mines returns ‘best’ Mulga Tank assays yet

Western Mines Group (ASX:WMG) has returned its ‘best assay results yet’ from its Mulga Tank Nickel-Copper-Platinum Group Elements (Ni-Cu-PGE) Project in Western Australia. 

Assays from hole MTD027 show cumulative disseminated nickel sulphide mineralisation of 694m @ 0.31% Ni, 141 parts per million (ppm) cobalt (Co), 68ppm Cu, and 30 parts per billion (ppb) platinum+palladium (Pt+Pd) with a sulphur:nickel (S:Ni) ratio of 1.0. 

The $16.65 million market capitalisation company says the broad intersections of disseminated nickel mineralisation with elevated Ni and S, in combination with highly anomalous Cu and PGE, show ‘strong’ evidence of an extensive magmatic sulphide mineral system throughout hole MTD027.

Assays also confirm Ni-Cu-PGE mineralisation in remobilised massive nickel sulphide veinlets in hole MTD027, including 1m @ 1.05% Ni, 290ppm Co, 111ppm Cu, 110ppb Pt-Pd from 504m. 

Commenting on the assays, Western Mines Group Managing Director Caedmon Marriott says: “These assay results from MTD027 surpass previous results from EIS holes MTD023 and MTD026 and further confirm we have discovered a huge working nickel sulphide mineral system within the Mulga Tank Ultramafic Complex. 

The assay results support the visual observations and clearly show nearly 700m of disseminated nickel sulphide mineralisation. 

Of particular interest is the intersection from 1,208m returning 96m @ 0.4% Ni, including 8m @ 1.11% Ni. This heavily disseminated mineralisation is starting to show what a high-tenore nickel sulphide mineral system can produce and is possibly Perseverance-style ‘cloud’ sulphide. 

Of particular interest is the intersection from 1,208m returning 96m @ 0.4% Ni, including 8m @ 1.11% Ni. This heavily disseminated mineralisation is starting to show what a high-tenore nickel sulphide mineral system can produce and is possibly Perseverance-style ‘cloud’ sulphide

A similar intersection of 88m @ 0.44% Ni from 1,212m, with individual results up to 0.69% Ni, was seen in hole MTD023. The significant gravity high anomaly to the north of these holes may represent a sulphide-enriched keel and/or feeder vent of the overall intrusion. 

This undrilled area of the intrusion is becoming an interesting follow-up target as our ongoing exploration drilling campaign continues. The 3D inversion data from our recent MobileMT survey will be used to further define drillholes in this area.”

Hole MTD027 was the sixth hole of the company’s phase two program and lies on the eastern side of the complex in an area that has had no previous drilling. 

The hole was designed to test a coincident gravity and magnetic high, a minor moving-loop electromagnetic (MLEM) anomaly, and the presence of nickel sulphide mineralisation in this area. 

Western Mines drilled the hole for a total depth of 1,662.3m, which is the deepest hole drilled at the project to date. 

The company is continuing to conduct both diamond and reverse circulation (RC) drill programs at Mulga Tank with the aim of testing the extent of shallow disseminated nickel sulphide mineralisation and deeper targets. 

Further drillholes will continue to be added to both programs, with ongoing targeting work, as Western Mines explores the Mulga Tank Ultramafic Complex. 

Western Mines Group is an ASX-listed minerals exploration company focused on ‘high-value’ gold and nickel sulphide deposits across a portfolio of ‘highly prospective’ projects located on ‘major’ mineral belts of Western Australia. 

As of 30 June 2023, the company had $3.272 million cash and cash equivalents at hand, according to its latest quarterly report.

Write to Aaliyah Rogan at Mining.com.au    

Images: Western Mines Group
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Written By Aaliyah Rogan
Relocated from the East Coast in New Zealand to Queensland Australia, Aaliyah is a fervent journalist who has a passion for storytelling. When Aaliyah isn’t writing stories, she is either spending time with friends and family or down at the beach.