The Kalamalka mine is located 13 kilometres east-southeast of Vernon, west of Craster Creek.

In this area, east of the Okanagan Valley fault zone, sedimentary and volcanic rocks of the Devonian to Triassic Harper Ranch Group are unconformably overlain by sedimentary and volcanic rocks of the Upper Triassic to Lower Jurassic Nicola Group and are in probable fault contact with metamorphic rocks of the Shuswap Terrane. Jurassic granitic plutons of the Nelson Intrusions intrude the older rocks. Eocene Penticton Group and Miocene Chilcotin Group volcanic and sedimentary rocks cap areas of older rock.

A shear zone within foliated diorite, near the contact with metamorphosed Harper Ranch sediments, hosts gold, silver, copper, zinc and lead mineralization. The 7 metre-thick, northeast-southwest striking and steeply northwest-dipping shear is occupied by quartz veins and lenses. The 2 to 25 centimetre-thick quartz bands alternate with zones of altered diorite and argillaceous sediments. Pyrite and graphite are common throughout the shear. Native gold, pyrrhotite, chalcopyrite, and minor galena and sphalerite occur as disseminations in the quartz veins and pods and in the chlorite- quartz matrix of the shear. The gold mineralization is concentrated in shoots which plunge steeply and occur progressively deeper to the southwest. The main ore shoot was about 30 metres long, 50 metres deep and 2.5 metres thick. Sericite and chlorite alteration is present up to 0.5 metre from the veins. Carbonate (calcite) flooding of the hangingwall, up to several metres thick, has occurred locally.

By 1897, an 8-metre shaft had been sunk on the vein, and by 1934, an additional 43 metres of crosscuts and drifts had been completed.

Mining commenced in 1935 and continued until 1944. The mine was developed on 3 main levels through one adit. A total of 6592 tonnes of direct-shipping ore produced 108,052 grams of silver, 90,137 grams of gold, 208 kilograms of copper, 420 kilograms of lead and 172 kilograms of zinc. Base metals were only reported for a few shipments.

In 1967, Coin Canyon Mines Ltd. did minor exploration drilling. In 1987-88, Triple Star Resources Ltd. carried out rehabilitation of underground workings, geological mapping, trenching, an induced polarization survey and drilling.