The Rob Roy occurrence is located southwest of the Sucwoa River, approximately 1.5 kilometres west of the river mouth on Head Bay.

The area is underlain by northwest striking Upper Triassic Vancouver Group, Quatsino Formation limestone that dips moderately to the southwest. The limestone is intruded by a granodiorite stock of the Early to Middle Jurassic Island Plutonic Suite. The limestone has been recrystallized, skarned and in places, altered to garnetite. Many cross-cutting porphyritic greenstone dikes predate the skarn alteration. Other feldspar porphyry dikes are related to the Eocene Catface Intrusions.

Magnetite mineralization is contained within garnet skarn with rare associated chalcopyrite and pyrite. Magnetite is often, but not always, free of garnet. Magnetite pods are parallel to bedding and roughly follow the margin of the intrusive contact in a northwest direction.

Brewer reports that the grade is similar to the Glengarry (092E 001) although no assays were done and estimates that about 45,360 tonnes of probable ore grading 56.8 per cent iron are present (Minister of Mines Annual Report 1916, page 294).

During 1979 through 1981, Pan Ocean Oil completed programs of geological mapping and geochemical sampling on the area as the Tah 1-19 claims. In 1983, Aberford Resources continued on the previous mapping and sampling programs. In 1984, Homestake Canada completed a program of geological mapping and rock sampling. In 1987, Great Keppel Resources completed a program of geological mapping, geochemical sampling, hand trenching and a ground magnetic survey. In 1988, Centaur Resources completed a program of geological mapping and geochemical sampling. In 2007 and 2008, Silverlake Capital completed programs of geochemical sampling and geological mapping on the area. During 2009 through 2013, Homegold Resources completed programs of prospecting, historical literature reviews and air photo interpretations on the area as part of the Head Bay property.

In 2012, Canadian Dehua International Mines Group Inc. completed air photo interpretation on their Head Bay Property, covering the Glengarry and Elaine past producers, the Rob Roy, Head Bay and Vivian prospects, and the Mohawk, Middle Quarry, Upper Quarry and North Tsowwin showings. In 2014 Pioneer Exploration Corp. on behalf of Canadian Dehua completed GPS grid-based geological mapping, soil and stream moss mat geochemistry and ground magnetics covering the Glengarry past producer, and the Rob Roy and Head Bay prospects; and limited prospecting and stream moss mat geochemistry near the Vivian prospect.