The Bromley Silver occurrence is located on Richter Mountain, adjacent to the past- producing Horn Silver mine. A complete exploration history can be found in MINFILE 082ESW002.

The area is regionally underlain by metasediments and metavolcanics of the Carboniferous to Permian Kobau Group. Quartzite, commonly micaceous or graphitic, schist, chlorite schist, greenstone, amphibolite and minor marble comprise the lithology. This metasedimentary and metavolcanic sequence has been intruded by the Jurassic-Cretaceous Fairview Formation, and Jurassic Kruger and Similkameen intrusions. The Fairview and Similkameen intrusions vary in composition from granite to diorite with granodiorite and quartz diorite most common. The Kruger batholith is a syenitic intrusion.

Locally, the occurrence lies in Kruger syenite, which is composed of biotite-hornblende granodiorite and hornblende syenite. The area is bordered to the north by Kobau Group metasediments and metavolcanics and in the east by Similkameen plutonic rocks and Kobau Group rocks.

Mineralization occurs in a, 0.90 metre wide, altered quartz vein (Bromley vein) carrying pyrite, argentite, native silver and minor gold. The vein strikes north and dips 15 to 20 degrees to the east.

In 1960, selected grab samples of the vein, over 0.10 to 0.30 metres, returned up to 2813 grams per tonne silver. Chip sampling, the same year, returned 550 grams per tonne silver over 1.05 metres (Property File: Falconbridge - Macrae, R. (1960-06-04): Bromley Bros Ag Property Report).