The North Star occurrence lies in the Zeballos gold camp, in the southeastern headwaters of Goldvalley Creek and approximately 3.7 kilometres south-southeast of the creek’s junction with the Zeballos River.

Regionally, the area is underlain by Upper Triassic to Lower Jurassic Bonanza Group basaltic to rhyolitic volcanic rocks. Conformably underlying the Bonanza volcanic rocks are limestones and limy clastics of the Triassic to Lower Jurassic Parson Bay Formation (Bonanza and Vancouver groups) and Upper Triassic Quatsino Formation (Vancouver Group), and tholeiitic basalts of the Upper Triassic Karmutsen Formation (Vancouver Group). Dioritic to granodioritic plutons of the Zeballos intrusion phase of the Jurassic Island Plutonic Suite have intruded all older rocks. The Zeballos stock, a quartz diorite phase of the Eocene to Oligocene Mount Washington Plutonic Suite, is spatially related to gold-quartz veining in the area. Bedded rocks are predominantly northwest striking, southwest dipping, and anticlinally folded about a northwest axis.

The North Star past producer lies within the Eocene Zeballos stock of quartz diorite. A few andesite dikes, up to 3.6 metres wide, are reported in the area (Geological Survey of Canada Paper 40-12, page 26). The workings explored an east-striking zone of shearing and cross-fracturing that ranges from a width of 15 metres in the west, where it consists of north- to east-striking fractures, to a width of 1.5 metres in the east, where east-striking fractures predominate. Quartz-sulphide and quartz-calcite stringers cut the shear zone diagonally in an east-northeast direction. The veins range in width from less than 1.0 to 7.5 centimetres, and in length from 0.5 to 10 metres. The quartz, usually crystalline and vuggy, is along the vein walls with sulphides towards the centre. Principal sulphides are pyrite with local arsenopyrite, sphalerite and galena.

The quartz stringers, averaging 0.6 metre apart, are gash veins occupying short straight tension breaks along which there has been little apparent displacement. Alteration of the wallrock is strongest along the east-northeast–striking quartz veins. The quartz diorite has been bleached up to 5 centimetres away. No alteration is present at north- and west-striking gouge seams, where quartz and white mica make up the white clay filling.

The veins have yielded assays as high as 3566 grams per tonne gold (Bulletin 27, page 104) but production of 13 600 tonnes of sorted ore in 1942 averaged 9.26 grams per tonne gold (Bulletin 27, page 102).

In 1937, a sample assayed 14.7 grams per tonne gold (Property File - W.H. Patmore [1937-09-19]: Report on "L.M." and "P.M." Mineral Claims).

In 1942, a dump sample assayed 9.26 grams per tonne gold (Bulletin 27, page 102).

The area has been explored since the 1930s with development of two adits, a winze and a number of opencuts. The No. 2 and 3 adit portals are located at elevations of approximately 754 and 719 metres, respectively.

In 1989, Golden Quadrant Resources completed 12.8 line-kilometres of ground electromagnetic and magnetic surveys on the area.