Unnamed (north of Bear Valley)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10000740
MRDS ID A011380
Record type Site
Current site name Unnamed (north of Bear Valley)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -143.52762, 62.86663 (WGS84)
Relative position Best location: Richter and others, 1975, USGS MF-655K, loc. 4. Accurate within 500 ft radius
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Materials information

Materials Type of material
Azurite Ore
Malachite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    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 Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt

Nearby scientific data

(1) -143.52762, 62.86663

Comments on the geologic information

  • Geologic Description = Zone of strong malachite and azurite stain in amygdaloidal basalt flows of 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 Tok

Comments on the workings information

  • Workings / Exploration = Type of workings: surface

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011380
USGS Alaska Resource Data File ARDF NB007

Bibliographic references

  • Deposit

    Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.

Comments on the references

  • Primary Reference = Richter and others, 1975, USGS MF-655K

General comments

Subject category Comment text
Deposit Model Name = Lode: volcanogenic
Deposit Other Comments = See other volcanogenic deposits in Nikolai Greenstone: (NB025, 054, 055).

Reporter information

Type Date Name Affiliation Comment
Reporter 06-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 06-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 06-FEB-1997 Richter, D.H. U.S. Geological Survey