The Robin occurrence is located in the head waters on an un-named creek that flows south easterly into Toquart Lake, approximately 2 kilometres north east of Draw Mountain.

The area is underlain by Karmutsen Formation basalts and andesites, and Quatsino Formation limestone, both of the Upper Triassic Vancouver Group. These in turn are overlain by Lower Jurassic Bonanza Group flows, tuffs and breccias ranging from basalt to rhyodacite in composition. Stocks of quartz diorite and granodiorite of the Jurassic Island Plutonic Suite intrude the strata. The youngest rocks in the area are Tertiary volcanics consisting of welded tuffs, breccias, basaltic tuffs and rhyodacites. Coeval Tertiary intrusions of quartz diorite to quartz monzonite occur and may be linked to the Eocene. Rocks of the pre-Jurassic Westcoast Complex occur in the region. They are genetically related to the Jurassic Island Plutonic Suite, and considered to be derived from Sicker and Vancouver groups rocks.

Locally, several samples of Karmutsen andesite contain anomalous amounts of gold. These samples were taken in a creek canyon that is also the contact of Island Plutonic Suite granodiorite on the east and Karmutsen volcanics on the west. The canyon also defines the position of a major northwest trending fault. The higher assays are reported to be associated with pyritic quartz veins, gouge-filled fault zones and structurally controlled alteration. Three samples of the zone yielded values of 0.30, 0.40 and 0.60 grams per tonne gold (Assessment Report 14658).

In 1984 and 1985, Odyssey Ex. completed programs of rock and silt geochemical sampling and prospecting.