Cosmo Metals uncovers base metals intersections from pXRF data at Minjina prospect, WA

Cosmo Metals (ASX:CMO) has confirmed that portable XRF (pXRF) data has discovered zinc, lead, copper, and silver intersections at the Minjina prospect within the company’s Yamarna Project in Western Australia. 

The discovery resulted from the completion of a reverse circulation (RC) drill program. The program consisted of 7 holes (1,734m) and targeted 2 distinct mineralisation styles, located 1km north of the company’s Mt Venn deposit. 

In addition, the focus of the recently completed drilling was to test these open extensions of the MIRC003 intersection down dip and along strike position with RC drill holes MIRC010, 014, and 015. 

Cosmo reports mineralisation is unconstrained within a greater than 1km x 750km zone of elevated Zn following up a ‘higher-grade’ zone in hole MIRC003. These results include 7m @ 3.20% Zn, 0.82% Pb (4.02% Zn + Pb), and 11.84g/t Ag from 73m, including 2m @ 5% Zn, 1.4% Pb (6.4% Zn + Pb) and 18.83g/t Ag from 76m. 

Additionally, holes MIRC010, 012, 013, and 014 intersected several wide zones of Zn-Pb mineralisation, which successfully extended the mineralised zone more than 80km to the east and 80km to the south of MIRC003 where it remains open in both directions. 

Commenting on the drill results, Cosmo Metals Managing Director James Merrillees says: “The confirmation of a thickening zone of zinc-lead-silver mineralisation in the MIRC014 and MIRC010, as well as increasing copper mineralisation downdip, supports the model that we are moving closer to the centre of the mineralised system where the best grades and thicknesses of mineralisation are interpreted to occur. 

These results continue to support the interpretation that this may be the distal edge of a larger system. I look forward to the results of DHEM modelling in MIRC012 which stopped short of the massive sulphide zone intersected in MIRC013, 80km south of MIRC003. 

“This massive sulphide zone with not only copper but also zinc mineralisation, is the first time this coincidence of target elements has been intersected at Yamarna”

This massive sulphide zone with not only copper but also zinc mineralisation, is the first time this coincidence of target elements has been intersected at Yamarna.” 

pXRF data has also confirmed that in addition to the thick zones of Zn Pb-dominant mineralisation there was a clear trend of increasing Cu grades down dip and along strike of MIRC003. 

Cosmo reports that downhole electromagnetic (DHEM) surveying was completed in January 2023, with modelling of the data ongoing to define targets for follow-up drill testing to identify controls on the Minjina discovery. 

Laboratory assay results are expected next month and will integrate into the targeting model, including results of the DHEM surveys in preparation for follow-up drilling campaigns in Q2 2023. 

Cosmo Metals is a base metals exploration company, focused on the advancement of its flagship Yamarna Project. The project is ‘highly’ prospective for copper-nickel-cobalt and platinum group elements, and is located 130km north-east of Laverton in the Eastern Goldfields region of Western Australia.

Images: Cosmo Metals Ltd
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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.