Past Producer in Alaska, United States with commodities Copper, Silver

Geologic information

Identification information

Deposit ID 10001028
MRDS ID A011702
Record type Site
Current site name Erickson
Alternate or previous names Erickson and Madden
Related records 10258140

Geographic coordinates

Geographic coordinates: -142.25246, 61.40579 (WGS84)
Relative position Near head of Glacier Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Silver Secondary

Comments on the commodity information

  • Ore Material = Copper (native)

Materials information

Materials Type of material
Chalcocite Ore
Cuprite Ore
Malachite Ore
Tenorite Ore
Copper Ore

Mineral occurrence model information

Model code 87
USGS model code 23
BC deposit profile D03
Deposit model name Basaltic Cu (BC name is Volcanic redbed Cu)
Mark3 model number 118

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Nikolai Greenstone
    Rock description Nikolai Greenstone
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -142.25246, 61.40579

Comments on the geologic information

  • Geologic Description = Native Cu, tenorite, cuprite, and minor amounts of other Cu minerals in irregular masses, thin veins, and disseminated grains in upper parts of amygdaloidal lava flows and, to a lesser extent, as fillings in amygdules or associated with quartz-epidote veins in Triassic Nikolai Greenstone. Deposit may be restricted to one 6 to 8 ft lava bed containing numerous amygdules. Most of copper fine-grained; copper masses to 27 kg have been recorded.
  • Age = Cretaceous

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nizina

Comments on the production information

  • Production Notes = Minor production in 1917.

Comments on the workings information

  • Workings / Exploration = Explored by about 100 m of underground workings in two tunnels and 3 levels. One sample assayed 70 ppm Ag, four samples ranged between 7 to 30 ppm Ag (MacKevett and Smith, 1968). Underground workings.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011702
USGS Alaska Resource Data File ARDF MC159

Bibliographic references

  • Deposit

    Miller, D.J., 1946, Copper deposits of the Nizina district, Alaska: U.S. Geological Survey Bulletin 947F, p. 93-120.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.

  • Deposit

    MacKevett, E.M., Jr., 1970, Geology of the McCarthy B-4 quadrangle: U.S. Geological Survey Bulletin 1333, 31 p.

  • Deposit

    MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, scale 1:63,360.

  • Deposit

    MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.

Comments on the references

  • Primary Reference = Miller, 1946

General comments

Subject category Comment text
Deposit Model Name = Basaltic Cu

Reporter information

Type Date Name Affiliation Comment
Reporter 09-MAR-94 Leonard, K.R. U.S. Geological Survey
Reporter 09-MAR-94 Elliott, R.L. U.S. Geological Survey
Reporter 09-MAR-94 Nokleberg, W.J. U.S. Geological Survey
Reporter 09-MAR-94 Richter, D.H. U.S. Geological Survey