The Broken Hill polymetallic vein is on the east side of Sebring Creek, approximately three kilometres north of Carpenter Lake. The prospect is within argillite, slate, quartzite and chert with andesite and basalt; all are phyllitic and highly altered. These rocks are part of the Mississippian to Jurassic Bridge River Complex (Group). The sedimentary rocks are cut by granodiorite of the Eocene Mission Ridge pluton and Tertiary porphyritic dacite.

An area 18 metres wide and continuous for at least 500 metres contains veins, lenses and disseminations of pyrite, galena, sphalerite, chalcopyrite and malachite. The rocks are brecciated, fractured and siliceous and comprise part of the regionally important Marshall Creek fault zone.

A best assay, obtained from the upper of two adit portals, graded 709.0 grams per tonne silver, 0.14 grams per tonne gold, 1.03 per cent copper, 3.83 per cent lead and 2.05 per cent zinc. An average of assays across 18 metres of silicification is 48.3 grams per tonne silver (Assessment Report 11457).