The Montgomery showings are a series of lenses of massive sulfides and disseminated sulfides in micaceous chloritic schist and sericitic quartzite of the metavolcanic-phyllite division of the Lower Paleozoic Upper Index Formation. Thin limestone and impure dolomite layers, calc-silicate gneiss, calcareous phyllite and massive to schistose greenstone layers are common in the immedi- ate vicinity of the showings. This succession, believed to be right way up, is immediately underlain by calc-silicate gneiss, calcareous schist, amphibolite and locally skarn adjacent to the Goldstream pluton, and a thick succession of quartzite and pelitic schist of the quartzite-schist division. To the northeast it is overlain by more calcareous rocks and a thick marble of the carbonate-phyllite division (Economic Geology, Vol. 79, No. 5).

Mineralization consists of disseminated pyrrhotite occurrences over a distance of 1200 metres and massive sulphide beds composed largely of pyrrhotite and lesser chalcopyrite and pyrite. The strata- bound massive sulphide mineralization, from 1 to 3.5 metres thick has been traced intermittently along strike for about 770 metres and through a vertical distance of 375 metres. The horizon strikes approximately west northwesterly and dips from 40 to 45 degrees north.

The Montgomery deposits are hosted by the same lithologic unit as the Goldstream deposit which is considered to be 'Besshi-type'.

A 2.0 metre channel sample assayed 1.76 per cent copper, 0.24 per cent zinc, 3.2 grams per tonne silver, and 0.014 grams per tonne gold (Assessment Report 10180).