Iron Cap

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Zn
Ore minerals arsenopyrite; chalcopyrite; pyrrhotite; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.068
Longitude -130.214
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Iron Cap prospect is at the south boundary of Section 11 at an elevation of about 3850 feet on a south-facing mountainside overlooking the West Fork of Texas Creek, and about 1.8 mile east-northeast of the outlet of Texas Lake (Elliott and Koch, 1981, p. 14, loc. 45). The location is accurate to within about a quarter of a mile.

Geologic setting

Geologic description

The country rocks in the area of the Iron Cap 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. 44, 98) consists of an 11-foot zone of slate and fine-grained tuffaceous graywacke containing stringers and veins of sulfides, and a 2-foot quartz-calcite vein carrying pyrrhotite, chalcopyrite, sphalerite, and a little arsenopyrite. The deposit, which is about 100 feet above the contact of the Texas Creek Granodiorite, is approximately parallel to the bedding in the slate and graywacke hostrocks. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2 percent Cu.
Geologic map unit (-130.215705363754, 56.0676928406332)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Alteration of deposit Slate and graywacke country rocks are impregnated with sulfide minerals.

Production and reserves

Workings or exploration Deposit was explored in 1920s by an opencut 12 feet wide. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2 percent Cu.
Indication of production None

Additional comments

Prospect originally staked in 1923.

References