The Isle occurrence is located on the west side of Meadow Mountain at 2256 metres elevation above sea level, near the headwaters of John Creek in the Slocan Mining Division.

Regionally, the area lies within the Selkirk Mountains of southeastern British Columbia. The occurrence is within the Kootenay Arc, a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Upper Proterozoic to Lower Cambrian Hamill Group, the Lower Cambrian Badshot Formation, and the Paleozoic Lardeau and Milford groups. The volcano-sedimentary sequence is intruded by numerous Paleozoic to Mesozoic granitoid plutons and has been metamorphosed to at least middle greenschist facies.

Rocks on the Isle property include phyllite, sandstone and grey limestone of the Broadview Formation (Lardeau Group). The strata strike northwest and dip east between 60 to 80 degrees. Mineralization is hosted within a 20 metre wide shear zone that strikes north and dips subparallel to bedding.

A short adit was excavated to evaluate a quartz vein within the shear zone. The rocks within the shear are altered to sericite schist. High silver, lead and antimony values occur with massive sulphides on the apex of dragfolds within the shear. Mineralization consists of galena and tetrahedrite within quartz-calcite veins. A chip sample across 0.6 metre of vein material assayed 2358 grams per tonne silver, 29.9 per cent lead, 10.4 per cent antimony and 9.7 grams per tonne gold (Assessment Report 8532).

In 1970, two tonnes were mined form the vein to produce 31 grams of silver, 12 kilograms of lead and 8 kilograms of zinc.