The area of the Iron Creek showing is underlain by greenstone, tuffs, limestone and argillaceous sediments of the Carboniferous to Permian Mount Roberts Formation which form an irregular, discontinuous, easterly trending belt. The belt, varying from less than 1 kilometre up to 8 kilometres in width, is intruded in the north by Middle Jurassic porphyritic granite containing large feldspar phenocrysts, and in the east by Eocene Coryell Plutonic Suite syenite. These rocks are cut by a series of shears and fissures which have a northerly strike and steep dips.

At the Iron Creek showing, a strong northerly trending fracture zone cuts across altered and intensely silicified greenstone. One opencut exposes the altered greenstone mineralized with disseminated pyrite, chalcopyrite, galena and very minor sphalerite. In 1978, a sample submitted by owner Sam Craig assayed 0.11 per cent lead, 0.11 per cent zinc and 0.007 per cent copper (Addie, G., 1978).

Rex Silver Mines Ltd. conducted sampling and geophysical surveys in the area in 1983, 1985 and 1986.

In 2006, Astral Mining Corporation conducted a helicopter-borne geophysical (electromagnetic) survey on the area as a part of the JJ property.