The Cuba occurrence is located on the west shore of Duncan Lake, just north of Schroeder Creek in the Slocan Mining Division.

Regionally, the area lies within the Kootenay Arc near the margins of the Ancestral North American Terrane. The Kootenay Arc is a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Eocambrian Hamill Group, the Lower Cambrian Badshot Formation, and the lower Paleozoic Lardeau Group. The volcano-sedimentary sequence is intruded by numerous Ordovician, Devonian and Mississippian granitoid plutons. The rocks have undergone regional metamorphism to middle or upper greenschist facies (Paper 1993-1).

The property is underlain by quartz mica schist of the Index Formation of the Lardeau Group. A narrow band of crystalline limestone of the Badshot Formation is exposed on the eastern part of the property. Quartz veins with minor amounts of pyrite and galena occur within the limestone exposures. Pyritic lenses also occur within the micaceous schist. Locally, sulphide content can amount up to 20 per cent of the rock volume.

The property has been explored with a 20 metre deep shaft and a 45 metre long adit. The underground workings focused on a 25 centimetre wide quartz vein carrying galena, sphalerite and pyrite. The vein has a strike of 040 degrees and a dip of 50 degrees southwest. A grab sample from the vein near the shaft assayed 423 grams per tonne silver (Assessment Report 9598).