Unnamed (north-northwest of Reds Lake)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001411
MRDS ID A012156
Record type Site
Current site name Unnamed (north-northwest of Reds Lake)

Geographic coordinates

Geographic coordinates: -148.69335, 67.90974 (WGS84)
Relative position This site is at an elevation of about 4,300 feet, approximately 5 3/4 miles north-northwest of the west end of Reds Lake (SW1/4 sec. 28, T. 36 N., R. 5 W., of the Fairbanks Meridian). This site corresponds to unnamed loc. 78 in DeYoung (1978) and is included with loc. 50 in Schmidt (1997). The location is accurate within a 1/2-mile radius.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • Ore Material = Unspecified copper sulfides (chalcopyrite) and/or malachite-azurite
  • Ore Material = Unspecified copper sulfides (chalcopyrite) and/or malachite-azurite

Materials information

Materials Type of material
Pyrite Ore
Pyrrhotite Ore
Chalcopyrite Ore
Malachite Ore
Azurite Ore

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -148.69335, 67.90974

Comments on the geologic information

  • Geologic Description = This occurrence is described only as copper sulfides and/or malachite-azurite stains in Devonian limestone and siltstone overlying the Skajit Limestone (Brosgi and Reiser, 1964). A small body of greenstone is nearby. Schmidt (1997, loc. 50) includes this prospect in a group of three, presumably similar deposits. They consist of quartz veinlets containing malachite-azurite plus or minus pyrite, chalcopyrite, and pyrrhotite in the Silurian and Devonian Skajit(?) Limestone and overlying siltstone and limestone (Beaucoup Formation?). No other information is available.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chandalar

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012156
USGS Alaska Resource Data File ARDF CH088

Bibliographic references

  • Deposit

    Brosgi, W.P., and Reiser, H.N., 1964, Geologic map and section of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-375, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-457, 1 sheet, scale 1:250,000.

  • Deposit

    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.

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.

  • Deposit

    Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.

Comments on the references

  • Primary Reference = Brosgi and Reiser, 1964

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins(?) (Cox and Singer, 1986; model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1999 J.M. Britton U.S. Geological Survey