The Ptuck area is underlain by siltstones, sandstones and andesitic fragmentals of the Lower Jurassic Unuk River Formation of the Hazelton Group.

The most significant result from the Delta Claims is the discovery of the Ptuck showing. The showing comprises a 5 to 10 metre wide shear zone hosting a 0.5 to 1 metre wide quartz-carbonate (ankerite?) vein with associated sphalerite plus/minus galena plus/minus chalcopyrite plus/minus tetrahedrite. Five samples were taken along the strike length with significant values ranging from 129 to 0.66 gram per tonne gold, 8.7 to 57.8 grams per tonne silver, 0.0225 to 0.143 per cent copper, 0.042 per cent to 1.24 per cent lead, and 0.63 per cent to 16.60 per cent zinc (Assessment Report 31747).

Immediately to the east of the Ptuck is another 15 to 20 metre-wide mineralized zone within iron-carbonate altered sedimentary rocks hosting stockwork quartz-carbonate veins. Four samples were taken in this zone with significant values ranging from 180 to 251 parts per billion gold, 39.7 to 257 grams per tonne silver, 0.068 to 0.48 per cent copper, 0.23 to 8.74 per cent lead, and 4.48 to 30.10 per cent zinc (Assessment Report 31747). Note that most of the highest values are from a single select sample (J992526). The overall extent of the Ptuck zone is 50 by 70 metres.

The trend of the shear zone and veining is variable, although generally they are striking south to southwest and dipping steeply to the west or northwest. With this orientation and taking topography into consideration, the general trend of the Ptuck Zone is on strike with the Fairweather Zone (104B 168). Trace evidence of previous sampling was found on the main outcrop of the zone; however there are no known reports that include the Ptuck Zone.

See Fairweather (104B 168) for details of a common property work history.