The Blu showing is located near the western edge of the Late Triassic-Early Jurassic Guichon Creek batholith. Quartz diorite is in contact with Upper Triassic Nicola Group volcanics and sediments. The Nicola and Guichon rocks are commonly fractured. Nicola volcanics are typically a fine grained siliceous rock and the sediments are a dense grey siltstone. Minor finely disseminated pyrite and chalcopyrite occur in both quartz diorite and volcanics.
Geological mapping, geochemical, induced polarization and magnetometer surveys were completed on the property in 1969 on behalf of Hudson Bay Mountain Silver Mines Ltd.