In the Cahilty 1 showing area, folded and faulted metasediments of the lower Paleozoic Tsalkom Formation (Mount Ida Group) are intruded by Cretaceous? quartz monzonite.

The main showing is located on the south side and adjacent to a logging road. It is exposed by trenching over a length of about 14 metres along a strike of 350 degrees and across a width of about 3 metres. The dip of this zone is about 60 degrees east. Lenses of pyrite, pyrrhotite with minor amounts of galena, sphalerite and chalcopyrite occur in a quartz vein hosted in phyllite. A chip sample assayed 4.37 per cent lead, 0.62 per cent zinc, 0.01 per cent copper, 156.6 grams per tonne silver and 1.3 grams per tonne gold (Assessment Report 11146, page 9). A similar showing is also exposed in a trench on the north side of the road, about 80 metres northeast of the main showing.

Sparsely disseminated sulphides (pyrite, chalcopyrite, galena and sphalerite) also occur in a crystalline limestone (marble) unit.