The Kate showing is located in the Central Quesnel Belt of the Quesnellia terrane, underlain by the dominantly volcanic and sedi- mentary rocks of the Upper Triassic to Lower Jurassic Nicola Group. In this region the Nicola Group consists of a lower sedimentary succession overlain by green and grey basalt, in turn overlain by maroon basalt and breccias characterized by the presence of felsic clasts. The contact with the Omineca Belt to the east is a thrust fault and the Nicola Group is in fault contact with the Cache Creek Group to the west. Middle Jurassic sedimentary rocks overlie both the Cache Creek Group and the Nicola Group along parts of this western contact.

The showing is underlain partly by lower Nicola Group sediment- ary rocks and partly by basalt. These rocks are intruded by a com- plex of felsic dikes and irregular masses consisting of diorite, monzonite and syenite probably of Lower to Middle Jurassic age. Present also are quartz-biotite-feldspar dikes and quartz porphyry dikes which, because of the quartz content, are unlikely to be related to the alkaline intrusions. The intrusions are comagmatic with Nicola volcanic rocks, but are more likely related to a large Cretaceous batholith which outcrops along the Quesnel River to the south of the property.

Chalcopyrite occurs as fracture fillings, as disseminated grains and blebs and as near massive patches up to several centimetres across. Pyrite, minor bornite and molybdenite have also been reported.