Great Western Exploration holds a substantial and strategic land position of 960km² within the dynamically evolving Earaheedy Basin, specifically its 100% owned "Fairbairn Base Metal Project." Positioned on the margin of the Yilgarn Craton, the Fairbairn Project's prospectively for base metals has been a long-standing belief for Great Western, predating the discovery at Julimar by Chalice Mining Ltd (ASX: CHN).
Located near the northern boundary of the Yilgarn Craton, approximately 900km northeast of Perth, the Fairbairn Base Metal Project has gained significance in light of globally significant discoveries like Nova by Sirius Resources NL and Julimar by Chalice Mining Ltd (ASX: CHN). The Yilgarn Craton's boundary is currently under intense exploration for nickel, copper, and PGEs (Platinum Group Elements), considering the value of magmatic nickel deposits, which are major global sources of nickel and PGEs.
Historically, base metal and PGE deposits have been associated with mafic intrusions near the margins of Archean cratons, analogous to Thompson, Raglan, and Voisey Bay in Canada, as well as Julimar, Nova, and Nebo-Babel in Australia. Geoscience Australia's 2016 report highlighted the potential for magmatic Ni-Cu-PGE sulfide deposits in greenstone belts in the far east of the Yilgarn Craton and beneath the cover along the northern margin, precisely where the Fairbairn Base Metal Project is located.
Fairbairn is covered by mapped Archean basement areas (granites and gneiss) and Proterozoic sediments. A thorough examination of historical drilling has revealed several unmapped mafic lithologies within the Archean basement, including pyroxenite, gabbro, dolerite, lamprophyre, kimberlite, amphibolite, and serpentinite. The mafic sequences are often beneath a thin cover of Quaternary transported aeolian and colluvium (2m to 20m thick), with other areas covered by up to a maximum of 80m of siltstone and shale interpreted as Earaheedy Proterozoic sediments.
Most historical work at GTE's Fairbairn Project occurred between the late 1980s and the mid-1990s, primarily exploring for diamonds. This exploration included magnetic surveys, surface sampling, RC drilling, diamond drilling, and petrology. There are 36 historical drill holes in the main project area, with only 18 assayed for nickel. Anomalous nickel assays have been reported in two shallow Aircore holes, suggesting significant potential for nickel mineralization.
In addition to the nickel potential, shearing and quartz veining were observed in several drill holes within the project area, although these were never assayed for gold. Analysis of aeromagnetic data indicates potential for large structures paralleling and along strike of the Marymia greenstone belt, where substantial gold deposits have been discovered.
Given the complex structural setting, quartz veining within mafic greenstone lithologies along strike from known gold mineralization, it is reasonable to assume that the Fairbairn Base Metal Project is highly prospective for gold mineralization. Furthermore, the fact that the target mafic sequences are under shallow cover and have never been explored for gold enhances the overall prospectivity of the Project, presenting a compelling greenfields exploration opportunity.