The Copper King occurrence is located west of Matilda Inlet, on the eastern coast of Flores Island.

The area is underlain by metamorphosed, locally foliated volcanic rocks, volcanoclastics and minor bands of garnetized limestone and chert of the Paleozoic-Mesozoic Westcoast Complex occur near diorite of the Eocene Catface Intrusions.

The occurrence is reported to be a southern continuation of the pyrrhotite-chalcopyrite zone on Iron King (MINFILE 092E 021), where mafic volcanic rocks of the Paleozoic-Mesozoic West Coast Complex are intruded by granodiorite of the Eocene Catface Intrusions.

Ministry of Mines Annual Report 1907 reports that the mineralized zone occupies a ridge into which a tunnel has been driven. The whole of the tunnel's 9 metre length was reported to be in solid pyrrhotite.

There is some ambiguity about the location and style of this occurrence and that of adjacent ones (MINFILES 092E 021, 092E 033).

In 1962, Van-West Minerals completed a induced polarization survey on the area as the Contact and Ormond claims. In 1969, Falconbridge completed a program of silt and soil sampling and the area as the Flo group. In 1979 and 1981, Clear Mines completed programs of geological mapping, rock and soil sampling and airborne geophysical surveys on the area. In 1987 and 1988, Parallax Development completed programs of geochemical sampling, geological mapping, an induced polarization survey and twenty-eight diamond drill holes, totalling 2538.1 metres on the area as the Contact and Au claims.