The St. Patrick occurrence is located southwest of Sowaqua Creek, approximately 6.1 kilometres south east of its mouth on the Coquihalla River.

The area is underlain by Permian to Jurassic Hozameen Complex rocks comprised mainly of interbedded chert, pelite and basic volcanics. These are intruded by a Late Cretaceous or older quartz diorite. To the east of the showing, the Hozameen fault traverses south-southeast and separates the low greenschist facies rocks of the Hozameen Complex from unmetamorphosed Mesozoic rocks. Ultramafic rocks are cut by greenstones of the Hozameen Complex and generally occur along the fault. There is shearing along the contact and in places the ultramafics appear to be intrusive. The ultramafic rocks that occur along the Hozameen fault are part of the Coquihalla Serpentine Belt.

Mineralization occurs along the contact between the serpentinite and diorite intrusions. Numerous quartz-carbonate veinlets crosscut the serpentinite. The veins and fracture fillings range from 2.5 to 20 centimetres in width.

In 1983, samples collected from the quartz-carbonate veinlets averaged 0.343 gram per tonne silver and 0.034 gram per tonne gold. Samples collected from the serpentinite assayed 0.034 gram per tonne gold, 0.343 gram per tonne silver, 0.186 per cent nickel and 0.213 per cent chromium. Another sample assayed 0.213 per cent nickel and 0.069 per cent chromium. The laboratory testing facility found it difficult to dissolve and analyse the samples for chromium (Assessment Report 11449).

In 1980 and 1983, Altar Gold and Resources completed programs of soil and rock sampling, geological mapping and a 15.6 line-kilometre ground magnetic survey. In 2000 and 2001, Hillsbar Gold completed a program of prospecting and geological mapping on the area as the Plat 3 claim. In 2012, New Caroline Gold completed 434.4 line-kilometres of combined electromagnetic, magnetic and radiometric airborne geophysical surveys on the area.