The area of the Trilby showing is underlain by complexly folded metasediments striking 320 to 350 degrees with moderate to steep east dips. Fold structures display a shallow, though variable (5-25 degree) plunge to the southeast. The metasediments are part of the Cambrian to Devonian Lardeau Group and consist of chlorite schist, phyllite and occasional narrow limestone units.

Mineralization consists of shallow dipping shear zones which host vuggy quartz veins mineralized with minor amounts of argentiferous galena. Selected samples of massive mineralization collected from a dump adjacent to a short test adit yielded 21.05 per cent lead, 0.04 per cent zinc and 505.6 grams per tonne silver. More representative channel samples collected across exposed mineralization (0.5 to 0.8 metre wide) yielded 2.0 per cent lead and 68.5 grams per tonne silver (Assessment Report 13851).

The earliest recorded exploration on the Trilby showing was carried out by unnamed prospectors in 1899 who reported massive galena mineralization up to 46 centimetres wide. In 1985, a preliminary evaluation of limited underground and surface workings on behalf of Silver State Resources Ltd. failed to locate mineralization of the character described in the early 1900s reports.