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Chickamin

Prospect, Inactive

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Commodities and mineralogy

Main commodities Cu; Pb; Zn
Ore minerals chalcopyrite; galena; pyrite; pyrrhotite; tetrahedrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.071
Longitude -130.272
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Chickamin prospect is in Section 9 at an elevation of about 3000 feet on a precipitous west-facing mountainside overlooking Chickamin Glacier. It is about 1.4 mile north-northeast of Disappearing Lake (Berg and others, 1977, p. 84; Elliott and Koch, 1981, p. 11, loc. 27).

Geologic setting

Geologic description

The country rocks in the area of the Chickamin prospect are metamorphosed pelitic strata of the Jurassic or older Mesozoic Hazelton Group that are underlain and locally intruded by the Triassic Texas Creek Granodiorite. Both the Hazelton and Texas Creek, in turn, are intruded by the Eocene Hyder Quartz Monzonite (Smith, 1977; Berg and others, 1977, p. 15-18, 22-23).
Buddington (1929, p. 100) describes the deposit as a quartz stringer lode and a three-foot-thick quartz fissure vein in graywacke. The stringers and vein contain galena, chalcopyrite, sphalerite, pyrite, and a little pyrrhotite and tetrahedrite. In 1972-73, a U.S. Bureau of Mines field team searched for but could not find the prospect, which probably was covered by snow (Berg and others, 1977, p. 84). A grab sample from a foot-thick granitic dike in the area near the prospect contained traces of pyrrhotite and goethite.
Geologic map unit (-130.273705595044, 56.0706884543633)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Alteration of deposit Local iron staining.

Production and reserves

Indication of production None

Additional comments

Prospect could not be located 1972-73. Site is in Misty Fiords National Monument.

References

MRDS Number A010192

References

Berg, H.C., Elliott, R.L., Smith, J.G., Pittman, T.L., and Kimball, A. L., 1977, Mineral resources of the Granite Fiords Wilderness Study Area, Alaska, with a section on aeromagnetic data by Andrew Griscom: U.S. Geological Survey Bulletin 1403, 151 p.
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