Unnamed (north bank of the Kotsina River)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001073
MRDS ID A011757
Record type Site
Current site name Unnamed (north bank of the Kotsina River)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -143.92364, 61.71855 (WGS84)
Relative position North side of Kotsina River, 1.6 mi upstream from confluence of Rock Creek with Kotsina River. Best location: MacKevett and others, 1978, loc. 5. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • Ore Material = Copper (native)

Materials information

Materials Type of material
Chalcocite 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) -143.92364, 61.71855

Comments on the geologic information

  • Geologic Description = Sparsely distributed native Cu and chalcocite in amygdaloidal Triassic Nikolai Greenstone.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = None.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011757
USGS Alaska Resource Data File ARDF MC025

Bibliographic references

  • Deposit

    Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.

  • 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.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, scale 1:63,360.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.

Comments on the references

  • Primary Reference = Moffit and Mertie, 1923

General comments

Subject category Comment text
Deposit Model Name = Basaltic Cu

Reporter information

Type Date Name Affiliation Comment
Reporter 27-OCT-1997 Leonard, K.R. U.S. Geological Survey
Reporter 27-OCT-1997 Elliott, R.L. U.S. Geological Survey
Reporter 27-OCT-1997 Richter, D.H. U.S. Geological Survey