Sunset

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Pb
Other commodities Barite
Ore minerals galena; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.022
Longitude -130.21
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Sunset prospect is in Section 35 at an elevation of about 4700 feet on a west-facing mountainside above Ferguson Glacier (Elliott and Koch, 1981, p. 13, loc. 41). The location is probably accurate within about a quarter of a mile.

Geologic setting

Geologic description

The country rocks in the area of the Sunset prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which is underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996).
The deposit (Buddington, 1929, p. 109) consists of two sulfide-bearing quartz veins in Texas Creek Granodiorite near an isolated roof pendant of argillite and graywacke. One vein is 1-3 feet thick, has been traced on the surface for about 900 feet, and contains local concentrations of galena and pyrite. At one place, a shattered zone 20 feet wide contains about a five-foot width of quartz stringers carrying galena and pyrite. The other vein is about 3 feet thick, has been traced in outcrop for about 600 feet, and contains locally disseminated pyrite and a lens 4 inches thick and 12 feet long of pyrite, galena, and barite.
Geologic map unit (-130.211704935955, 56.021692876767)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c

Production and reserves

Workings or exploration Early workings consisted of minor surface stripping.
Indication of production None

Additional comments

Elliott and Koch (1981, p. 13. loc. 41) show silver as a queried commodity at the Sunset prospect, but do not mention silver in their description of the deposit. Silver also is not mentioned in any of the earlier published descriptions of the prospect.

References