The area of the Skajit Giant occurrence is underlain by basalt and massive to locally bedded chert of the Permian to Jurassic Hozameen Complex. Basalt-chert contacts are steeply dipping and probably faulted. Small intrusions of diorite to granodiorite of unknown, but probable Tertiary age occur in the basalt. A fault striking 015 degrees along Pyrrhotite Creek truncates a 120 degree striking fault that passes through the Giant Creek area. Monger has mapped another west-northwest striking fault in the valley north of the property (GSC Map 12-1969).

Over several square kilometres, the basalt is altered and veined. Alteration consists mainly of silicification and lesser sericitization. Three main types of mineralization are reported to occur in the vicinity; these include skarn, veins and porphyry types.

The main showing is an irregular lens-shaped body of massive sulphide, with an average thickness in the surface showing of 3 to 4 metres (maximum of 5 metres), with its long axis perpendicular to strike measuring about 25 metres. The body is controlled by a dominant fracture system which strikes 120 to 130 degrees and dips 40 to 50 degrees southwest, and by a subordinate fracture system striking 082 degrees and dipping 40 degrees south.

The body consists mainly of medium-grained pyrrhotite with numerous irregular veins and patches, up to a few centimetres across, of pyrite and much less chalcopyrite. Surface trench samples across 23.47 metres yielded an average assay of 0.5 per cent copper, 20.57 grams per tonne silver and 0.10 gram per tonne gold (Assessment Report 8839). About 183 metres west-northwest of the main showing is the probable extension of the Copper Cliff body. An assay from here yielded 0.4 per cent copper, 10.29 grams per tonne silver and 0.34 gram per tonne gold (Assessment Report 8839).

The massive sulphide body is enclosed in basalt which is moderately to strongly altered by brecciation, silicification and veining by pyrite, quartz, actinolite, epidote and chlorite. The least altered basalt is aphanitic and dark green in colour, containing 0.5 to 1 per cent magnetite. The top of a medium to fine-grained quartz diorite to granodiorite outcrops over a small area, 200 metres to the southeast of the showing. A few quartz-rich veins with clots of molybdenite occur in the intrusive rock.

The prospect was first mentioned in 1923 and has been explored since that time in conjunction with other nearby showings. Four diamond-drill holes were completed in 1980.