Unnamed (east of lower Nizina Glacier)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001049
MRDS ID A011727
Record type Site
Current site name Unnamed (east of lower Nizina Glacier)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -142.42248, 61.62274 (WGS84)
Relative position 1,000 ft east of Nizina Glacier, 3 mi up-glacier from toe. Best location: MacKevett, 1970. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcocite Ore
Malachite Ore
Calcite Gangue
Quartz Gangue

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
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Moonshine Creek Formation; Chiefly Silstone And Sandstone
    Rock description Moonshine Creek Formation; Chiefly Silstone And Sandstone

Nearby scientific data

(1) -142.42248, 61.62274

Comments on the geologic information

  • Geologic Description = Chalcocite- and malachite-bearing quartz-calcite veins up to 20 cm thick in Triassic Nikolai Greenstone. Near major fault juxtaposing Nikolai Greenstone against Cretaceous Moonshine Creek Formation.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nizina

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 A011727
USGS Alaska Resource Data File ARDF MC096

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., 1970, Geologic map of the McCarthy C-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-844, 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 = MacKevett, 1970

General comments

Subject category Comment text
Deposit Model Name = Lode: vein

Reporter information

Type Date Name Affiliation Comment
Reporter 31-JUL-1997 Leonard, K.R. U.S. Geological Survey
Reporter 31-JUL-1997 Elliott, R.L. U.S. Geological Survey
Reporter 31-JUL-1997 Richter, D.H. U.S. Geological Survey