The area of the Mac 3 showing occurs in an area of Devonian to Permian Stikine Assemblage rock overlain by Upper Triassic rock of the Stuhini Group.
In 1989, Corona Corporation prospected the ZIP 3, 4, MAC 3, 4 (of the Inhini property) and collected 4 panned concentrate silt, 9 silt and 68 rock chip samples. In 1990, Link Resources Inc. carried out a 700-kilometre airborne magnetic and EM survey over the entire Inhini Property (Assessment Report 20972).
A sample of limestone breccia with malachite, azurite, tetrahedrite assayed 2484.71 grams per tonne silver, 0.48 gram per tonne gold, 0.08 per cent lead, 0.29 per cent zinc and greater than 2 per cent copper (Assessment Report 19353). Quartz vein in the limestone is associated with the showing.