Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10000775
MRDS ID A011418
Record type Site
Current site name Reynolds
Alternate or previous names Butte Creek Copper Group
Related records 10112958

Geographic coordinates

Geographic coordinates: -141.42861, 62.1786 (WGS84)
Relative position Best location: Richter and others, 1973, USGS I-807, loc. 2. Accurate within 100 ft radius
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Malachite Ore
Calcite Gangue
Specularite Gangue

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) -141.42861, 62.1786

Comments on the geologic information

  • Geologic Description = Small veins of bornite, chalcocite, specularite, malachite, and calcite in amygdaloidal basalt flows of the Triassic Nikolai Greenstone; near contact between Greenstone and interbedded limestone and shale.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chisana

Comments on the workings information

  • Workings / Exploration = Chip sample across 5 ft of Fe-stained basalt (USGS OF 471, sample 131) assayed 50 ppm B, 150 ppm Cr, 150 ppm Cu, 70 ppm Ni, 200 ppm V and traces of Au, Ag, Mo and Zn. Type of workings: surface.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011418
USGS Alaska Resource Data File ARDF NB095

Bibliographic references

  • Deposit

    Moffit, F.H., 1954, Geology of the eastern part of the Alaska Range and adjacent area: U.S. Geological Survey Bulletin 989-D, p. 63-218.

  • Deposit

    Richter, D.H., Matson, N.A., Jr., and Smoll, H.R., 1973, Reconnaissance geologic map of the Nabesna A-1 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-807, scale 1:63,360.

  • 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.

  • Deposit

    Pilgrim, E.R., 1931, White River Precinct, Snag River area, in Stewart, B.D., Report on cooperation between the territory of Alaska and the United States in making mining investigations and in inspection of mines for the biennium ending March 31, 1931, p, 74-76.

  • Deposit

    Matson, N.A., and Richter, D.H., 1971, Geochemical data from the Nabesna A-1 quadrangle, Alaska: U.S. Geological Survey Open-File Report 71-0202, 10 p.

Comments on the references

  • Primary Reference = Moffit, 1954, USGS B 989-D

General comments

Subject category Comment text
Deposit Model Name = Lode: volcanogenic
Deposit Other Comments = See also: Sulzer (NB094)

Reporter information

Type Date Name Affiliation Comment
Reporter 05-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 05-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 05-FEB-1997 Richter, D.H. U.S. Geological Survey