Cosmos Exploration (ASX: C1X) has commenced a maiden Airborne Electromagnetic survey (AEM) at its 100% owned Byro East Ni-Cu-PGE Project in Western Australia.
This is the last phase of target generation work following on from soil sampling, AMAG/AMRAD and Gravity Surveys completed this year.
This is an exciting time for Cosmos and the Byro East Project. If we are successful in delineating AEM targets coincident with the other anomalies then we will undoubtably have some first-class Ni-Cu-PGE sulphide drill targets to test in an underexplored terrain, we should know very soon,” Executive Chairman, Jeremy Robinson said.
Airborne Electromagnetic survey (AEM)
A 1941 line kilometre Airborne Electromagnetic (AEM) survey has commenced at the Byro East Project utilising the UTS (Geotech) VTEM Max system. The AEM survey will cover 602 sq. km of the central tenure, targeting bedrock conductors associated with massive Ni-Cu-PGE sulphides within mafic-ultramafic host rocks.
Cosmos will prioritise gravity-high and magnetic anomalies coincident with Ni-Cr-Cu mafic lithogeochemistry for the survey.
Gravity high features likely indicate close proximity to more significant accumulations of mafic-ultramafic host lithologies, increasing the prospectivity for these areas. Flight lines will be spaced at 400m and infilled to 200m/100m over higher priority areas and any conductors identified during the survey. The survey is expected to take ten days to complete, with results announced towards the end of July.
Gravity
In May 2022, Cosmos collected 662 gravity stations over the central four Byro East tenements to improve the poor resolution in the existing regional gravity data set from up to 28 sq. km to 1.0 sq. km.
Gravity can be an effective geophysical tool in the Narryer terrane to screen large areas for sizeable bodies of mafic and ultramafic host rock. Mafic rocks are generally denser than the surrounding granitic-gneiss and metasedimentary country rocks and commonly appear as gravity highs. Concentric to oval-shaped gravity highs are particularly important as these features may represent intrusion-related layered mafics, pipes or feeder zones associated with Ni-Cu-PGE deposits/
Several oval-shaped and high priority gravity features with supporting mafic lithogeochemistry have been identified at the Bluebottle, Leatherback and T6 targets (Figure 3). These plus other Priority 1 and 2 targets identified in the newly acquired data and will be the focus of the AEM survey.