The Alpha prospect is located at elevations of 2,286 to 2,591 metres on the summit of the divide between Bobbie Burns Creek, a tributary of the Spillimacheen River, and Bennison Creek, a tributary of the Duncan River. Alpha lies on the north side of International Basin which is located at the headwaters of Bobbie Burns Creek. The area is approximately 32 kilometres southwest of Golden.

The Maud S (L.649) was Crown-granted in 1893 and the Standby (L.761) in 1894. The Picton claim adjoined the Maud S. In the late 1890s the group was referred to as the Bennison group, the Boston group or the Boston-Bennison group. The workings in 1898 included a 76 metre adit on the Maud S claim and a 12-metre shaft on the Standby claim. A 15-metre shaft was developed on the Picton claim. Work also included open cuts and other adits. The No. 1 adit comprised about 79 metres of crosscuts and drifts on the Boston vein and the No. 2 adit, 229 metres below the No. 1 adit, was a 48 metre drift on the Bennison vein. About 91 metres west of the Boston vein an adit was driven 11 metres on another vein. During 1903 to 1904 the 213 metre long Kimpton adit at 2,499 metres elevation was driven from the southeast side of the summit to explore a showing on the northeast side of the summit. The Alpha Fraction (L.5106), Alpha No. 2 (L.5113), Alpha (L.6785), Omega (L.6786) and Omega No. 2 (L.6787) were Crown-granted in 1905 and the Alpha Mines Syndicate acquired the property under the name Alpha Group. In 1922-23, they extended the Kimpton tunnel. In 1965, Bonanza Exploration Ltd. acquired the eight Crown grants and the Alpha group of eleven recorded claims and rehabilitated the Kimpton adit. During 1966, they completed geological mapping and 122 metres of "hand trenching." Four diamond drillholes totalling 186 metres were drilled and seven holes (640 metres) were drilled from the old Kimpton tunnel. The occurrence is located in the Purcell Mountains. The area is underlain by northwest trending metasediments of the Upper Proterozoic Horsethief Creek Group. Regionally, this group consists of slates, argillites, quartz-pebble conglomerates, grits and minor limestone.

The formations in International Basin, as well as the adjoining main valley, are folded and fractured across the bedding. Rock types include greenish grey chloritic schists, dark slaty schists (in which cubes of pyrite are a characteristic feature), quartzites, slates and conglomerates. In the bluffs and ridges it is evident that the formations have been folded to form a large anticline. Cutting the metasediments are a series of well-defined quartz veins trending north and south. These are intersected by another series of quartz veins trending about 300 degrees. Mineralization occurs at the intersection of the two vein systems. Mineralization in the veins consists mainly of galena and pyrite with minor tetrahedrite, chalcopyrite and sphalerite. However, pyrite is described as occurring in massive form or irregularly disseminated throughout the quartz. Gold is associated with pyrite. Ore in one vein yielded the following average values: 6.18 grams per tonne gold, 249.60 grams per tonne silver and 26.6 per cent lead (Haggen, 1927, Property File).