Miramar rationale for focusing on WA’s Gascoyne region has been clearly highlighted by the identification of high priority nickel-copper-PGE targets at the Mount Vernon project.

Recent electromagnetic surveying has identified multiple late-time anomalies that were untested by previous drilling or sampling.

When combined with historical nickel-copper-PGE rock chip and soil sampling results over the 26km long potentially mineralised basal contact, this is an indication of potential nickel-copper-PGE sulphide mineralisation according to Miramar Resources (ASX:M2R) chairman Allan Kelly.

“The Kulkatharra Dolerite sills present at Mount Vernon are the same age as the Giles Complex which hosts the large Nebo and Babel nickel-copper deposits in the West Musgraves,” he said.

“There are multiple significant historic nickel, copper and PGE rock chip and soil results over a significant strike length along the base of one of these dolerite sills and a number of late-time EM anomalies that could be related to nickel sulphide mineralisation.”

Nickel sulphide potential

Mount Vernon is characterised by a series of Kulkatharra Dolerite sills intruding sediments of the Collier Basin, including pyritic siltstones within the Ilgarari Formation.

Previous exploration was focussed on sediment-hosted copper-lead-zinc mineralisation, though a series of nickel, copper and PGE anomalies were outlined by reconnaissance soil traverses while rock chip sampling returned several strongly elevated nickel and copper results over several kilometres of strike at the basal contact of a dolerite sill.

Drilling in 1997 – again targeting copper-lead-zinc – leant further weight to the nickel argument after intersecting nickel-copper-PGE anomalies in the dolorite sill.

Despite this, a significant portion of the 26km long basal contact has never been sampled or drilled.

Miramar flew a detailed magnetic and electromagnetic survey in early 2022, identifying multiple late-time anomalies which could be related to nickel-copper-PGE sulphide mineralisation.

Significantly, despite the presence of multiple apparently similar dolerite sills, the late-time EM anomalism was only observed over the northernmost of these sills, implying there is something different about this unit. That this area returned the highest historical rock chip and soil sampling results adds more to its prospectivity.

Miramar is planning a reconnaissance field trip during June pending field activities at the Whaleshark IOCG project.




This article was developed in collaboration with Miramar Resources, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.