The area of the McClair showing is underlain by Upper Triassic sedimentary and volcanic rock of the Takla (Stuhini) Group. Lower to Middle Jurassic marine sedimentary and volcanic rock of the Hazelton Group occur to the immediate north. Devonian to Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks.

In 1981, the area was prospected and sampled by SEREM Ltd. as the Poo claim. Rock samples from a northwest-facing slope, located approximately 650 metres to the southeast and at an elevation of 1800 metres, yielded values of up to 0.245 gram per tonne gold, 9.2 grams per tonne silver, 0.550 per cent copper, 0.060 per cent lead and 0.120 per cent zinc, whereas other rock samples taken from a southwest-facing slope, a further 400 metres to the south-southeast yielded values of up to 2.9 grams per tonne silver, 0.143 per cent copper and 0.287 per cent lead (Assessment Report 9411). No sample descriptions were provided.

In 1989, a rock sample (36805) over 0.30 metre of rusty andesite with bands of chert hosting minor pyrite and chalcopyrite, located approximately 500 metres to the south-southwest, yielded 0.162 gram per tonne gold, whereas other samples (36802) from the same area yielded up to 3.8 grams per tonne silver and 0.420 per cent copper (Assessment Report 18338).

In 2005, a 0.5-metre chip sample taken by Stealth Minerals from massive skarn with pyrite and chlorite assayed 0.89 per cent zinc, 0.078 per cent lead, 0.076 per cent copper, 10.9 grams per tonne silver and 30 parts per billion gold (Assessment Report 28036).

Refer to Har (094E 053) for a details of the area work history.