The geology of the 15% of the licence area that outcrops is a typical Archean greenstone sequence of meta-basalt, with some high-Mg basalt horizons, ultramafic rocks, some gabbroic zones, thin cherty metasediment horizons, meta-sedimentary shale bands, aplite dykes and quartz veins; with intrusive granitoids occurring locally. There is extensive outcrop in the basaltic greenstone area, which also forms the topographic high of the Cagacaroon Hills. Small areas of granitic outcrop are more scattered and occupy lower relief topography, especially to the north of the Cagacaroon Hills. A large, magnetic granitoid dome (the Gearless Well Intrusion) is interpreted to occur, at depth, in the south of the tenement, based on the airborne magnetic geophysics over the area. Geophysics also indicates that a major north-south dextral shear zone – the Salt River Shear – passes through the south-eastern corner of E59/1657.
MinRex has been actively exploring the licence (E59/1657) since 2011. Work has sought to use surface sampling, geological mapping and existing geophysics to hone in to buried mineralized structures and favourable settings for mineralization, to allow subsequent drilling to be efficiently utilized. The tenement is thought to contain the northeast-trending extensions, under cover, of both the Golden Stream and the Deflector Mines.