The Iron Mask showing is located on the south side of Four Mile Mountain, 8 kilometres east of Hazelton. It lies between the Comet (093M 052) and the Mohawk (093M 051) Crown granted claims.

The property is underlain by a small (1500 metres diameter) stock of coarse grained grey granodiorite of the Eocene Babine Intrusions. The stock intrudes clastic sedimentary rocks of the Middle Jurassic to Lower Cretaceous Bowser Lake Group. Potassium/argon dating of the stock indicates an age of 55 million years (Geological Survey of Canada Open File 2322).

The main showing area consists of two semi-parallel fissure- veins which strike 015 degrees, dipping 42 degrees east. The veins carry galena, sphalerite, pyrite and minor chalcopyrite and tetrahedrite in a gangue of quartz and siderite. A second showing area is located 200 metres to the east.

In 1980, a grab sample (F-30-2) from a 5 to 8 centimetre wide vein assayed 336.7 grams per tonne silver, 0.94 per cent lead and 5.4 per cent zinc (Assessment Report 8672).

For a completed regional/property exploration history see the American Boy (MINFILE 093M 047) occurrence.