Fourth of July Creek

Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001043
MRDS ID A011721
Record type Site
Current site name Fourth of July Creek
Alternate or previous names Woodin and Herman
Related records 10233717

Geographic coordinates

Geographic coordinates: -143.15861, 61.52356 (WGS84)
Relative position 1,000 ft upslope from headwaters of Fourth of July Creek. Best location: MacKevett, 1972. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Malachite Ore


  • (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 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
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -143.15861, 61.52356

Comments on the geologic information

  • Geologic Description = Chiefly secondary copper minerals on joints and minor faults in Triassic Nikolai Greenstone.

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 = Short adit and remnants of numerous surface workings.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011721
USGS Alaska Resource Data File ARDF MC086

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 = 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