1. Mineral Resources
  2. Online Spatial Data
  3. Alaska Resource Data File (ARDF)

Unnamed (near Allen River)

Occurrence, Inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Cu; Zn
Other commodities Ni; Sn; Ti
Ore minerals cassiterite; chalcopyrite; rutile; sphalerite; unspecified copper sulfides

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-4
Latitude 67.3828
Longitude -151.9893
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is on Allen River, 0.4 mile downstream from the mouth of McCamant Creek. The occurrence is sample 237 in Dillon and others (1981 [AOF 133B]). The location is accurate within one-half mile.

Geologic setting

Geologic description

Brosge and Reiser (1960) noted copper sulfides and malachite in Upper Devonian black phyllite and slate on the Allen River near the mouth of McCamant Creek. Dillon and others (1981, sample 237 [AOF 133B]) collected a sample of mineralized, metaclastic quartzite on Allen River less than 0.5 mile downstream from McCamant Creek. The sample contained disseminated(?) chalcopyrite and sphalerite, secondary malachite and azurite, and possibly rutile and cassiterite. A sample contains 5,000 ppm copper, 320 ppm zinc, and 200 ppm nickel. The rocks in the area are Middle or Upper Devonian(?) phyllite and dolomite, with lesser metasandstone, marble, and conglomerate (Dillon and others, 1986).
Geologic map unit (-151.992045168141, 67.3823393982191)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?
Alteration of deposit Oxidation of copper minerals.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References

MRDS Number A011981

References

Cobb, E.H., 1972, Metallic mineral resources map of the Wiseman quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-469, 1 sheet, scale 1:250,000
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets.
Dillon, J.T., Cathrall, J.B., and Moorman, M.A., 1981, Geochemical reconnaissance of the southwest Wiseman quadrangle-summary of data on rock samples: Alaska Division of Geological and Geophysical Surveys Open-File Report 133B, 164 p.
Grybeck, Donald, 1977, Map showing known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166-C, 45 p., 1 sheet, scale 1:1,000,000.
Maas, K.M., 1987, Maps summarizing land availability for mineral exploration and development in northern Alaska, 1986: U.S. Bureau of Mines Open-File Report 10-87, 33 quadrangle overlays.
Reporters J.M. Britton (Anchorage)
Last report date 8/9/2002