The Copper King occurrence is underlain by the Lower Jurassic (Hazelton Group Unuk River Formation) to the east and the Upper Triassic Stuhini Group to the west.

The contact between the Triassic and Lower Jurassic rocks is marked by an extensive north-northwest trending cataclasite zone, known as the South Unuk Zone, which contains biotite-chlorite-epidote schist (Bulletin 63, Figure 13).

The main showing occurs north of a prominent east-west gorge and west of Harrymel Creek. A north trending fault zone which dips 60 to 85 degrees west is the host for the mineralization. To the west of the fault zone laminated flow breccias and felsite flows occur. Limestone, argillite, and siltstone are underlain by laminated felsite and andesitic flows grading into massive andesitic flows and breccias. The showing generally comprises small replacement bodies of massive fine-grained pyrrhotite and chalcopyrite which occur along the western edge of the fault zone and in felsite lenses which are 3 to 9 metres long and 0.3 metres wide. In addition, small stringers of pyrite on the eastern side of the fault zone also contain pyrrhotite and chalcopyrite.

At some locations, up to 17 grams per tonne gold is reported to accompany the copper-iron sulphide mineralization (Vancouver Stockwatch Jan. 17, 1989).

Some geophysical surveys were undertaken during this early phase of work by a company who held the property under option (Assessment Report 150). An airborne EM-MAG survey was conducted over the property in 1988 for Teuton Resources (Assessment Report 17625).

In 1989 Casandra took a sample in the Copper King area that yielded a high of 0.124 ounces gold per ton (Assessment Report 19714)

Fieldwork was carried out in 1990 by Bravo Resources Inc on the Paradigm 1 claim, consisting of 15 rock samples and 1 stream sediment sample (Assessment Report 21543). Non-intensive but pervasive pyrite-pyrrhotite mineralization was noted as being widespread in the Paradigm claim examined 0 by Bravo Resources. It was reported to be visible across widths of at least 300 m both north and south of the lower gorge of Copper King Creek. The best exposures, however, were accessible only by rope which were not accessed in 1990. The best sample from what was believed to be the Copper King showing taken in 1990 yielded 1.04 per cent copper 0.026 per cent lead, 0.086 per cent zinc and 7.4 grams per tonne silver (Assessment Report 21543). Gold was not elevated. Elsewhere in the area, lesser but still anomalous copper values suggest the presence of other chalcopyrite-bearing zones in the metavolcanics. Mineral associations linked silver assays to pyrrhotite mineralization.