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  3. Alaska Resource Data File (ARDF)

Unnamed (near Metlakatla)

Occurrence, Undetermined

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Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; malachite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale KC
Quadrangle map, 1:63,360-scale A-5
Latitude 55.126
Longitude -131.567
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at sea level, at the west end of the town of Metlakatla. The site is in section 9, T. 78 S., R. 92 E., of the Copper River Meridian. It corresponds to loc. 24 in Berg (1972 [I 684]), loc. 148 in Elliott and others (1978), and loc. 47 in Karl (1992). The location is accurate within 0.1 mile.

Geologic setting

Geologic description

The country rocks in the area of this site are schist, hornfels, and gneiss derived from an assemblage of undivided volcanic, sedimentary, and intrusive rocks of Silurian and Ordovician age (Berg, 1972; Berg and others, 1988). The rocks are polymetamorphic: the latest metamorphism, to greenschist grade, probably occurred in Late Cretaceous time. The occurrence consists of sparsely disseminated pyrite, chalcopyrite, and traces of malachite in schist (Berg, 1972, loc. 24).
Geologic map unit (-131.56867846731, 55.1256567582532)
Mineral deposit model Disseminated lode deposit of undetermined origin.
Alteration of deposit Minor oxidation of copper mineral.

Production and reserves

Indication of production None

References

MRDS Number A012390

References

Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360.
Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map I-1807, 27 p., scale 1:250,000.
Elliott, R.L., Berg, H.C., and Karl, S.M.,1978, Map and table describing metalliferous and selected non-metalliferous mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-73B, 17 p., 1 sheet, scale 1:250,000.
Reporters H.C. Berg, USGS
Last report date 7/6/1999