The Drifter area is underlain by Lower Jurassic Telkwa Formation (Hazelton Group) volcanics. The volcanics are predominantly tuffs, agglomerates and grey to green andesites. Minor porphyritic (plagioclase and/or hornblende) flows and interflow sedimentary rocks are also present. The volcanic rocks are intruded by narrow quartz feldspar porphyry dikes which are 1 to 3 metres wide and strike northeast. The dikes, fine to medium-grained, are possibly related to the Eocene Kastberg Intrusions.

A grab sample (BD96-33) of a 10-centimetre-wide quartz carbonate vein with up to 15 per cent pyrite assayed 2.66 grams per tonne gold, 1.4 grams per tonne silver, and 0.075 per cent copper; another grab sample (BD96-34) at the same location as BD96-33 was collected from a 12-centimetre-wide quartz vein with chalcopyrite and malachite and graded 0.76 gram per tonne gold, 4.4 grams per tonne silver, and 0.47 per cent copper (Assessment Report 24882, Figures 5a, b and c).

Refer to Bearnx (094D 003) for related geological information and a common work history.