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Nebraska

Prospect in Alaska, United States with commodity Copper
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Geologic information

Identification information

Deposit ID 10001052
MRDS ID A011730
Record type Site
Current site name Nebraska

Geographic coordinates

Geographic coordinates: -143.18056, 61.55967 (WGS84)
Relative position Includes several prospects on both sides of Hidden Creek. Best location: Mackevett, 1972. 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
Bornite Ore
Chalcanthite Ore
Chalcocite Ore
Chalcopyrite Ore
Malachite Ore

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 Triassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Chitistone Limestone
    Rock description Chitistone Limestone

Nearby scientific data

(1) -143.18056, 61.55967
ListMap

Comments on the geologic information

  • Geologic Description = Cu sulfides and secondary Cu minerals in Triassic Nikolai Greenstone mainly localiized along faults at or near contact with Triassic Chitistone Limestone.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nizina

Comments on the workings information

  • Workings / Exploration = Explored by short adits and surface excavations. Evidence of recent workings in prospects north of Hidden Creek (MacKevett, 1976). Type of workings: surface and underground.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011730
USGS Alaska Resource Data File ARDF MC084

Bibliographic references

  • Deposit

    Moffit, F.H., and Maddren, A.G., 1909, Mineral resources of the Kotsina-Chitina region, Alaska: U.S. Geological Survey Bulletin 374, 103 p.

  • 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., 1972, Geologic map of the McCarthy C-6 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-979, 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 = Moffit and Maddren, 1909

General comments

Subject category Comment text
Deposit Model Name = Lode; vein

Reporter information

Type Date Name Affiliation Comment
Reporter 04-AUG-1997 Leonard, K.R. U.S. Geological Survey
Reporter 04-AUG-1997 Elliott, R.L. U.S. Geological Survey
Reporter 04-AUG-1997 Richter, D.H. U.S. Geological Survey