The Johns Vein occurrence is located on the Toquart River.

The area is underlain by metavolcanic rocks of the Upper Triassic Karmutsen Formation, Vancouver Group. These consist of massive mafic flows that may be amygdaloidal, fine grained or brecciated. Dikes and/or sills of granodiorite, feldspar porphyry and quartz feldspar porphyry outcrop in the area and likely belong to the Early to Middle Jurassic Island Intrusions.

Locally, quartz veins hosting pyrite and chalcopyrite mineralization occur in a relatively un-altered monzodiorite.

In 1905, the area was staked as the Red Rover Property (MINFILE 092F 034). From 1991 to 2011, Electrum Resources completed various programs of VLF-EM and geochemical surveys, including five diamond drill holes, totalling 826 metres, in the TOQ zone (MINFILE 092F 542). In 2009, a grab sample of sulphide vein material assayed up to 0.65 gram per tonne gold, 563 grams per tonne silver, 8.77 per cent copper and 1794 parts per million zinc (Assessment Report 31247). In 2011, sample L-11-J-08, composed of complex vein material, assayed 487 parts per billion gold, 392 grams per tonne silver, 3.64 per cent copper and 807 parts per million zinc (Assessment Report 32862).