The Nordic 4 occurrence is located between Bootjack and Polley lakes, approximately 1 kilometre north of Bootjack Creek.

The Mount Polley area is underlain by felsic Jurassic to Triassic Polley stock rocks, which have intruded Nicola Group volcanic rocks. The Nicola Group in the area comprises a sequence of alkali basalt breccias and Upper Triassic (Norian) flows overlain by polylithic breccias characterized by the presence of Lower Jurassic felsic clasts. The stock that hosts the copper mineralization is a complex of several intrusive phases ranging in composition from diorite to syenite. Polley stock of syenodiorite, monzonite porphyry and lesser pyroxenite composition forms the hills between Bootjack Lake and Polley Lake.

Locally, as defined by trenching and drilling, a monzonite porphyry hosts disseminated to blebby pyrite with minor magnetite. In 1997, diamond drilling yielded values up to 0.17 per cent copper, while previous drilling, in 1995, is reported to have assayed up to 0.33 per cent copper over 10 metres (Assessment Report 25382).

During 1986 through 1997, Big Valley Resources completed programs of geochemical sampling, ground geophysical surveys, test pitting and diamond drilling on the area as the Nordic 4 claim. See Lloyd-Nordik (MINFILE 093A   160) occurrence for a detailed work history of the area.