The Larrabee occurrence is located 8 kilometres southwest of Invermere, at the head of Goldie Creek, in the Golden Mining Division. The property consists of a single Crown grant (Lot 10116).

Regionally, the area is underlain by Proterozoic clastic sedimentary rocks of the Purcell and Windermere supergroups and by lower Paleozoic strata of the Beaverfoot and Mount Forster formations (Geoscience Map 1995-1).

The Purcell Supergroup strata include the Aldridge, Creston, Kitchener, Dutch Creek and Mount Nelson formations. The Windermere Supergroup unconformably overlies the Purcell Supergroup rocks and includes the Toby Formation and Horsethief Creek Group (Paper 1990-1).

In the vicinity of the occurrence, rocks of the Kitchener and Dutch Creek formations have been further subdivided and assigned to the Van Creek and Gateway formations. The Van Creek Formation correlates with the Lower Kitchener Formation while the Gateway Formation is equivalent to the lower portion of the Dutch Creek Formation. The Mount Nelson Formation has been subdivided into seven discrete members, a lower quartzite, a lower dolomite, a middle dolomite, a purple dolomite, an upper middle dolomite, an upper quartzite, and an upper dolomite (Open File 1990-26). The sedimentary rocks have undergone regional metamorphism to at least greenschist facies.

Massive barite occurs in pods and veinlets within argillite and phyllite of the Horsethief Creek Group. Pyrite, malachite, azurite and siderite are associated with the barite veins usually at the vein margins. The barite is partly white and nearly pure but most is discoloured and iron-stained. The vein is faulted, 3 to 5 metres wide, and exposed for a distance of 130 metres.

Between 1959 and 1960, 9000 tonnes of barite were mined from the occurrence (Assessment Report 10367). The material shipped had a specific gravity ranging from 4.06 to 4.41 (Geology, Exploration and mining in British Columbia 1971).