The lower Hidden Creek area is underlain by granitic rocks assigned to the Late Jurassic and Early Cretaceous Eagle Plutonic Complex. In the area of the occurrence, the complex comprises muscovite granite.

A northwest striking, gently northeast dipping quartz vein containing galena, chalcopyrite and sphalerite outcrops on the northwest side of the creek. It ranges in width from 10 to 40 centimetres and has been traced for a distance of 100 metres on the surface. Feldspars in the host granite adjacent to the vein have been sericitized.

The best of five chip samples of the vein assayed 54.86 grams per tonne silver, 1.37 grams per tonne gold, 0.24 per cent zinc, 0.1 per cent lead and 0.07 per cent copper across 40 centimetres (Assessment Report 12411).