The Zig-Zag (Sunshine) occurrences are located on the north side of Busk Creek at elevations of 1050 to 1260 metres, approximately 3 kilometres north of Crescent Bay on Kootenay Lake.

Regionally, the area is underlain by late Precambrian to Cretaceous volcanic and sedimentary rocks. Jurassic to Cretaceous Nelson and Valhalla intrusives and Tertiary alkalic plutons intrude the volcanic and sedimentary units. The region has been metamorphosed to lower to middle greenschist facies with associated chlorite, epidote, biotite hornfels and minor amphibole. Contact metamorphism related to Nelson and later intrusives occurs in both the volcanics and sediments. Regional structure is dominated by a series of north-northwest-trending tight folds and shears.

In the Kokanee Creek area, Slocan Group basal slates and phyllites with lesser fine-grained quartzite and limestone beds are overlain by well-bedded, arenaceous quartzite argillites with local impure quartzite and limestone. The top of the argillite section is marked by tuffaceous lava beds, likely related to early Rossland Group volcanism. Jurassic Nelson intrusives consist of porphyritic granite, granodiorite, diorite, quartz diorite, monzonite and hornblende syenite. Several smaller alkaline plugs belong to the Tertiary (Eocene) Coryell Batholith.

Locally, five zones of mineralization have been identified. These consist of the Lower (M-2), Middle and Upper (M-1) zones at elevations of 1050, 1128 and 1260 metres, respectively, located along an old road on the north side of Busk Creek; the Bear zone, located a few hundred metres to the northwest and east of Kokanee Creek and the N zone, located on the west rim of Busk Creek canyon at an elevation of 1050 metres.

The Upper (M-1) zone is composed of a micaceous quartzite band, averaging 2.4 metres wide, hosting bands and veinlets of sulphides. The sulphides consist of pyrrhotite, sphalerite, pyrite, galena and minor chalcopyrite. The quartzite strikes north 30 degrees east and dips 50 to 60 degrees northwest. Six trenches have exposed the band for a strike length of 52.5 metres. Later reports describe a 0.9-metre wide, highly oxidized shear zone, striking 350 degrees and dipping 40 degrees southwest, in a biotite granodiorite hosting pods of fine-grained galena and sphalerite up to 7.5 centimetres wide.

The Middle zone is 0.9-metre-wide and consists of a highly oxidized exposure.

The Lower (M-2) zone, is composed of a 2.1-metre wide, massive grey quartzite band hosting coarse disseminations and veinlets of sphalerite and pyrrhotite. The quartzite strikes southwest with a steep dip and is enclosed by rusty schistose rocks and quartz biotite gneiss. Possible disseminated scheelite is also reported.

The N zone is composed of an oxidized biotite-quartz schist and grey quartzite hosts a submassive band of sphalerite and pyrrhotite, varying in width from 5 to 45 centimetres. The sulphide band strikes northeast with a steep dip to the northwest.

Pyrrhotite mineralization is reported at the Bear zone.

In 1967, five chip samples from the Upper (M-1) zone averaging 1.95 metres in length yielded average values of 30.1 grams per tonne silver, 2.0 per cent lead, 2.6 per cent zinc and 0.01 per cent copper (Property File - Hogan Mines Ltd. [1968-03-18]: Report on the Kit & Kok Mineral Claim Group).

In 1980, drilling is reported to have yielded intercepts of 0.3 gram per tonne gold, 16.1 grams per tonne silver, 0.17 per cent zinc and 0.40 per cent lead over 0.51 metre in hole B-1; 0.7 gram per tonne gold, 4.8 grams per tonne silver, 0.15 per cent zinc and 0.05 per cent lead over 1.05 metres and 0.4 gram per tonne gold, 7.5 grams per tonne silver, 2.16 per cent zinc and 0.05 per cent lead over 0.42 metre in hole B-2; 0.6 gram per tonne gold, 8.6 grams per tonne silver, 0.78 per cent zinc and 1.11 per cent lead over 0.45 metre in hole B-3 and 0.3 gram per tonne gold, 39.7 grams per tonne silver, 4.72 per cent zinc and 0.45 per cent lead over 0.60 metre and 29.1 grams per tonne silver, 0.52 per cent zinc and 1.52 per cent lead over 0.48 metre in hole B-4 (Property File - D. Bialkoski [1980-09-02]: Field Notes - Sunshine Claims (Zig Zag) - Nelson Area). It is not known what zone(s) the drillholes were performed on.

The area has been explored since the late 1800s with one adit, of unknown age, reported on the north side of Busk Creek at an elevation of approximately 1200 metres. In 1967 and 1968, Hogan Mines Ltd. examined the area as the Kit and Kok claims. In 1980, a program of prospecting and four drillholes was completed on the area as the Sunshine claims, Zig-Zag property.