The Tad 3 West occurrence is located 25 kilometres northwest of Kelowna, west of Whiterocks Mountain.

In this area, Devonian to Triassic Harper Ranch Group argillaceous rocks, basalt tuffs and flows, and minor rhyolite and limestone are intruded by Eocene granitic rocks. The Harper Ranch Group is intruded in places by Middle Jurassic ultramafic/monzonite and calc-alkaline complexes of the informally named Terrace Creek Batholith. The diverse alkaline ultramafic/monzonite complex comprises hornblende, gabbro, quartz monzonite, mafic monzonite, porphyritic monzonite, biotite pyroxenite and hornblende pyroxenite.

Locally, as defined by drilling, a biotite pyroxenite hosts traces of disseminated pyrite, magnetite, chalcopyrite and molybdenite, associated with epidote alteration.

In 1980, diamond drilling (hole PDH80-33) yielded up to 0.023 per cent molybdenum over 9 metres and 0.014 per cent molybdenum over 15 metres in hole PDH80-24 (Assessment Report 8456).

During 1988 through 1990, samples yielded up to 0.24 gram per tonne platinum and 0.20 per cent copper (Property File - Verdstone Gold Corp. [2000-04-17]: Summary Review of the Dobbin Property).

During 1977 through 1980, Cominco Ltd. carried out geological mapping, magnetometer and drill programs on the area. During 1988 through 1990, Chevron Canada Resources completed programs of prospecting, geological mapping and geochemical sampling. During 1997 through 2003, Verdstone Gold Corporation and Molycor Gold Corporation examined the area.