The Alexander Creek South phosphate occurrence is located in the southern headwaters of Alexander Creek, near the railway crossing over the creek and approximately 2.6 kilometres northwest of the north end of Summit Lake.

Regionally, the area is underlain by a series of generally north-trending sedimentary rocks including dolomitic carbonate rocks of the Mississippian Etherington, Mount Head and Livingstone Formations (Rundle Group) and Pennsylvanian to Permian Rocky Mountain Group, fine clastic sedimentary rocks of the Triassic Spray River Group, undivided sedimentary rocks of the Jurassic Fernie Formation and undivided sedimentary rocks of the Jurassic to Cretaceous Kootenay Group.

Locally, phosphate, phosphatic shale, limestone and shale of the Jurassic Fernie Group unconformably overlie siltstone and minor shale of the Triassic Sulphur Mountain Formation (Spray River Group). The contact is marked by a 5-centimetre thick basal conglomerate. Phosphorite is 1 metre thick and contains 23.8 per cent P2O5 (Open File 1987-16). The upper extent of the phosphate interval is marked by a yellow-orange weathering marker bed. Faulting is abundant in the shale above the phosphate. Overlying the phosphorite is 1.6 metres of phosphatic shale and limestone containing 8.4 per cent P2O5.

Work History

In 2002, a program of geological mapping and rock sampling was completed on the area as the Cro claims. In 2013 and 2014, Fertoz International Organic Inc. conducted programs of prospecting and rock sampling on the area as part of the Crowsnest property. In 2019, Fertoz International Inc. conducted a minor program of prospecting and rock sampling on the area as the Summit property. In 2022, High Brix Manufacturing Inc. conducted a further program of prospecting and rock sampling on the Cro property. In 2024, Fertoz International Organic Inc. conducted a program of prospecting and rock sampling on the area as part of the Alexander Creek property.