The area of the Jack Pot is underlain by micaceous quartzite, mica schist and limestone of the Mississippian to Lower Permian Milford Group.

The Highlander vein outcrops from near Loon Lake to Munn Creek, a distance of about 1.6 kilometres. The fault zone in which it occurs continues even further. The vein curves from a strike of almost due north near Loon Lake to 340 degrees on the Jack Pot. Galena and sphalerite occurs in a gangue of quartz and calcite.

It is reported that in 1953, 352 tonnes of ore from the Jack Pot was milled.