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Keno

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag; Au; Cu; Pb; Zn
Other commodities Barite
Ore minerals chalcopyrite; galena; pyrite; sphalerite; tetrahedrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.031
Longitude -130.232
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Keno prospect is in Section 27 at an elevation of about 4000 feet on an east-facing mountainside above Ferguson Glacier (Elliott and Koch, p. 13, loc. 39). The location is probably accurate within about a quarter of a mile.

Geologic setting

Geologic description

The country rocks in the area of the Keno prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton, Group, which are underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996).
In 1925, Buddington (p. 94) described the deposit as quartz fissure veins 2-4 feet thick that cut granodiorite and contain galena and other sulfides. A specimen, presumably of the best ore, contained 0.6 oz Au and 3 oz Ag per ton, and 48 percent Pb.
In 1929, Buddington (p. 108) reported an adit driven along a quartz vein up to 4.5 feet thick in Texas Creek Granodiorite. The vein had been traced on the surface for about 400 feet, and contained oreshoots of solid sulfides as much as 7 inches thick comprising galena, pyrite, chalcopyrite, sphalerite, and tetrahedrite. The quartz also carries disseminated pyrite and, locally, some barite.
Geologic map unit (-130.233705088177, 56.0306912420825)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c

Production and reserves

Workings or exploration
Early workings included a 50-foot adit.
An early assay, presumably of the best ore, showed 0.6 oz Au and 3 oz Ag per ton, and 48 percent Pb.
Indication of production None

References

MRDS Number A010240

References

Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p., 1 plate.
Reporters H. C. Berg (Fullerton, California)
Last report date 5/17/1998