The A (Sun) occurrence is located in the northern headwaters of a branch of Wanokana Creek, approximately 4.2 kilometres south of the western end of Kains Lake.
Regionally, the area is underlain by northwest-trending belts of basaltic volcanics and carbonate sedimentary rocks of the Upper Triassic Karmutsen and Quatsino formations (Vancouver Group) and mafic volcanics and sediments of the Upper Triassic to Lower Jurassic Bonanza Group (Holberg volcanic unit, Nahwitti River wacke and Parson Bay Formation). These volcanic and sedimentary rocks have been intruded by granodioritic rocks of the Early to Middle Jurassic Island Plutonic Suite.
Locally, three mineralized zones of sphalerite, galena, chalcopyrite and pyrite mineralization have been identified in skarn-like rocks at the contact of a quartz feldspar porphyry and/or a feldspar hornblende porphyry with shaly limestone. The mineralized zones are exposed over widths and thicknesses of 0.3 to 1.8 metres and intermittently over an approximate strike length of 120 metres. The sulphides are disseminated or weakly massive, associated with coarse-bladed hornblende and chlorite, epidote, calcite and quartz. Banding of the mineralization is common and may represent relict banding; the elongate axis of the hornblende runs perpendicular to the banding.
In 1975, samples are reported to have yielded up to 1.67 per cent copper, 6.98 per cent zinc and 34.2 grams per tonne silver (Assessment Report 5822).
In 1979, five samples from various mineralized exposures yielded from 2.62 to 7.25 per cent zinc, 0.17 to 1.32 per cent lead, 0.215 to 1.35 per cent copper and 4.5 to 29.4 grams per tonne silver (Assessment Report 7847).
In 1980, highlights from chip sampling of hand trenches include 1.385 per cent copper, 0.58 per cent lead, 6.22 per cent zinc, 24.3 grams per tonne silver and 0.27 gram per tonne gold over 2.5 metres in sample R17; 0.512 per cent copper, 0.25 per cent lead, 10.20 per cent zinc and 23.9 grams per tonne silver over 3.2 metres in sample R9 and 0.984 per cent copper, 0.20 per cent lead, 3.77 per cent zinc and 57.11 grams per tonne silver over 3.0 metres in sample R 13 (Assessment Report 8837). Drilling, also performed at this time, yielded intercepts of 0.735 per cent copper, 0.96 per cent zinc and 34.2 grams per tonne silver over 4.9 metres in hole 80-5 and 0.560 per cent copper, 7.90 per cent zinc with 16.8 grams per tonne silver over 3.9 metres in hole 80-8 (Assessment Report 8837).
In 1989, a rock sample (109750) from a 0.15 to 0.45-metre wide, sulphide-rich (pyrite-chalcopyrite-sphalerite) dike or vein in a siliceous crystal tuff assayed 1.185 per cent zinc, 0.226 per cent copper and 9.0 grams per tonne silver (Assessment Report 19179).
Another zone of mineralization is report on the Moon claims approximately 2.2 kilometres to the northwest, close to a logging bridge over the upper Nahwitti River, where an altered limestone hosts fractures and seams of pyrite and chalcopyrite mineralization.
In 1975, the area was prospected, mapped and sampled as the Sun and Moon claims. In 1979 and 1980, Electra Resources Corp. completed programs of rock and soil sampling, geological mapping, a 2.0 line-kilometre ground magnetic survey and eight diamond drill holes, totalling 226.0 metres, on the area as the ST claims.
In 1989, Caribbean Resources Corp. completed a program of stream sediment and rock sampling and geological mapping on the area as the Wanokana North property.