Border

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu; Pb; Zn
Ore minerals chalcopyrite; galena; pyrite; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.046
Longitude -130.036
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Border prospect is in Section 24 at an elevation of about 650 feet, adjacent to the Alaska-British Columbia boundary (Elliott and Koch, 1981, p. 16, loc. 61). The property apparently straddles the old road that led to the boundary roadhouse, now in ruins. The location is accurate to within 0.1 mile.

Geologic setting

Geologic description

The country rocks in the area of the Border prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Triassic Texas Creek Granodiorite, which underlies and locally intrudes the Hazelton; the Eocene Border Granodiorite, which intrudes the Hazelton and Texas Creek rocks; and still-younger Tertiary lamprophyre dikes that cut all these rocks (Smith, 1973, 1977; Koch, 1996).
The deposit (Buddington, 1929, p. 90) consists of gash (fissure) veins of quartz in a shear zone in slate and graywacke between two granodiorite porphyry dikes. The quartz contains galena, pyrite, sphalerite, and a little chalcopyrite in sulfide shoots up to 6 inches thick, and considerable carbonate (calcite?).
Geologic map unit (-130.037704614566, 56.0457061421943)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c

Production and reserves

Workings or exploration Prospect was explored by a 70-foot adit, probably in the 1920s.
Indication of production None

Additional comments

Property originally staked in early 1920s.

References