The Camb showings are located on a nunatak called Lost Mountain in Bromley Glacier, approximately 15 kilometres due east of Stewart. This area has been investigated periodically for molybdenum and precious metal mineralization between 1960 and 1986.

The area is underlain by argillite and andesitic volcaniclastics of the Middle to Upper Jurassic Hazelton Group intruded by feldspar porphyry, andesite and lamprophyre sills and dIkes. Quartz monzonite of the Eocene Coast Plutonic Complex outcrops near the east edge of the nunatak.

The showings primarily comprise three quartz veins, the Handy, Mandy and Middle veins. However, the quartz monzonite to the east (on the RHS claims) is mineralized with pyrite, pyrrhotite and fracture filling and disseminated molybdenite. It has been speculated that the molybdenum bearing intrusion extends under the ice to McAdam Point (103P 220) where granodiorite containing molybdenite mineralization has been located. The Bromley Glacier is receding quite rapidly, 107 metres from 1960 to 1967, exposing more of the stock and mineralized quartz veins. The molybdenum and precious metal mineralization is considered to be closely related.

Three types of mineralization occurs in narrow but continuous quartz veins: 1) high grade gold and silver veins cutting all rock types and locally associated with quartz stockworks 2) quartz veinlets with siderite and calcite occurring along fault zones forming, and extending into, wall areas of andesite dikes 3) quartz stockworks in association with sulphide bearing, yellow calcite within feldspar porphyry dikes. Quartz veins contain massive sulphides as fracture fillings and are locally banded with thin films of argillite and/or graphite. Mineralization consists of pyrite, pyrrhotite, sphalerite, galena, chalcopyrite, arsenopyrite, greenockite, boulangerite and tetrahedrite (in order of abundance). Mineralization in stockworks consists of coarse sphalerite and galena in yellow calcite as stringers and coarse blebs. The stockworks are considered to be an early mineralization phase with low gold and silver values and sulphides rarely comprising more than 5 per cent of the veins.

The Mandy vein has been traced for 330 metres, is 5 to 60 centimetres wide, strikes 325 degrees and dips 70 degrees southwest. A 45 tonne composite bulk sample over 126 metres assayed 2.422 grams per tonne gold and 9.98 grams per tonne silver (George Cross Newsletter No.59, March 1986).

The Handy vein, 150 metres north of and parallel to the Mandy vein, has been traced for 800 metres and is 0.02 to 1.2 metres wide. A 45 tonne bulk sample over 57.9 metres assayed 24.68 grams per tonne gold and 154.26 grams per tonne silver (George Cross Newsletter No.59, March 1986).

The Middle vein occurs in between the Handy and Mandy veins and had lower assay values.

Similar mineralization and values occur in quartz veins of similar orientation on the RHS claims slightly to the northeast.