Tjosevig

Prospect in Alaska, United States with commodities Copper, Silver

Geologic information

Identification information

Deposit ID 10001041
MRDS ID A011718
Record type Site
Current site name Tjosevig
Related records 10282643

Geographic coordinates

Geographic coordinates: -142.77554, 61.49856 (WGS84)
Relative position Western flank of Green Butte, at 4,000 ft elevation. Best location: MacKevett, 1974. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary

Materials information

Materials Type of material
Azurite Ore
Malachite Ore

Alteration

  • (Local) Oxidation of Cu minerals.

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 Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Chitistone Limestone
    Rock description Chitistone Limestone
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic

Nearby scientific data

(1) -142.77554, 61.49856

Comments on the geologic information

  • Geologic Description = Chiefly malachite and azurite deposits in lower part of the 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 a short adit, presently caved.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011718
USGS Alaska Resource Data File ARDF MC132

Bibliographic references

  • 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., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, 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 = Miller, 1946

General comments

Subject category Comment text
Deposit Model Name = Basaltic Cu

Reporter information

Type Date Name Affiliation Comment
Reporter 14-NOV-1997 Leonard, K.R. U.S. Geological Survey
Reporter 14-NOV-1997 Elliott, R.L. U.S. Geological Survey
Reporter 14-NOV-1997 Richter, D.H. U.S. Geological Survey