The Alexander Creek North phosphate prospect is located in the headwaters of Alexander Creek, 14 kilometres northeast of Sparwood.

The area along Alexander Creek in the eastern margin of the Fernie Basin is underlain by fine-grained sandstones and siltstones containing abundant chert layers and nodules of the Permian Ranger Canyon Formation (Ishbel Group), overlain by interbedded dolomitic siltstones and shales of the Triassic Sulphur Mountain Formation (Spray River Group), followed by shales and siltstones of the Jurassic Fernie Group. These units dip west along the east limb of a major north trending variably plunging syncline.

A thin phosphate horizon exposed in two road cuts at the base of the Fernie Group overlies siltstone of the Sulphur Mountain Formation. A sample across 0.3 metre contained 29.4 per cent P2O5 (Open File 1987-16, page 96, sample SBB86-20A). The top and bottom of the phosphate bed were not exposed.

This occurrence was staked and prospected by Westrock Industries Ltd. in 1988. Formosa Resources Corporation prospected the southern extension of the phosphate horizon in 1989.