The Wrede Creek Chromite occurrence is located approximately 11 kilometres north of the south end of Johanson Lake (Geological Survey of Canada Memoir 251, page 64).

The showing is hosted in an Late Triassic Alaskan-type ultramafic intrusion. This ultramafic body intrudes Middle Triassic to Lower Jurassic Takla Group volcanics belonging to the Quesnel Terrane. The intrusion is bounded to the southwest by the southwest-trending Lay Range fault and to the northeast by a cross fault between the Lay Range fault and the Swannell fault. Across the Swannell fault, to the east, lies the para-autochthonous Cassiar Terrane represented by Upper Proterozoic rocks assigned to the Ingenika Group.

Mineralization consists of grains and rare blebs of chromite, up to 1.27 centimetres in diameter, within the ultramafic body (Geological Survey of Canada Memoir 251). Several small seams of chromite, from 1.27 to 2.54 centimetres in thickness, were found in talus blocks of serpentinite (Geological Survey of Canada Memoir 251).