The Sunny showing area is underlain by the northwest trending contact between Upper Triassic Nicola Group andesitic volcanic rocks to the west from diorite of the Late Triassic-Early Jurassic Iron Mask batholith to the east. Associated with the contact and for 300 metres north within the diorite is a zone of argillic alteration. Chalcopyrite and pyrite occur as blebs and patches in quartz veins in the altered zone in the diorite. Chip samples from the trenched mineralized area yielded up to 0.4 per cent copper (Assessment Report 10552). Two percussion-drill holes by Afton in 1988 in the vicinity of the trenches intersected diorite mineralized with chalcopyrite, magnetite and pyrite and trace native copper. The diorite exhibits substantial albitization and moderate epidote-chlorite-carbonate alteration. In 1991, Afton drilled four more percussion holes about 450 metres further east from the holes drilled in 1988. Three out of the four intersected minor amounts of chalcopyrite.

In 1979, geological mapping was carried out on the Sunny claim on behalf of Jocelyn Resources Ltd. In 1982, Argenta Resources Ltd. conducted a soil survey (65) over the Sunny claim. In 1984, Argenta Resources continued work on the claim and took 81 soil samples. In 1986, Afton Operating Corporation completed a soil survey (231) over the claim which was purchased from Argenta Resources. In 1988, two percussion holes totalling 213 metres were drilled on behalf of Afton Operating Corporation. In 1991, Afton drilled four percussion-drill holes totalling 335 metres on the Byr claims.