The Granite Main showing is located on the east side of the Granite Main logging road.

The area was mapped by Muller (Geological Survey of Canada Open File 821) as primarily diorite of the Mesozoic and/or Paleozoic Westcoast Complex. An east- trending band of limestone is also mapped. Volcanics of the Lower Jurassic Bonanza Group lie to the north.

Locally, two types of mineralized outcrop occur:

1.) The southern exposure consists of a vertical face 3 metres long and 1.5 metres high composed of massive and semi-massive pyrrhotite and pyrite with patches and stringers of chalcopyrite.

2.) The northern exposure, located 5 metres north of the massive sulphides, consists of a 12 metre long, low-relief, linear outcrop of altered intrusive rock with disseminated and stringer sulphides.

In 2003, Emerald Field Resources completed a program of geological mapping, geochemical sampling and geophysical surveys on the Pearson PGE property. Assays values were reported up to 0.53 gram per tonne gold, 11.8 grams per tonne silver and 7.45 per cent copper (Assessment Report 27280).