Unnamed (near Toby Creek)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001039
MRDS ID A011716
Record type Site
Current site name Unnamed (near Toby Creek)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -142.27553, 61.49774 (WGS84)
Relative position Two occurrences 1,000-1,200 ft upstream, on both sides of an unnamed tributary of Chitistone River. The unnamed tributary is 1.5 mi upstream from mouth of Toby Creek. Best location: MacKevett and Smith, 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
Chalcocite Ore
Malachite Ore


  • (Local) Oxidation of Cu minerals.

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) -142.27553, 61.49774

Comments on the geologic information

  • Geologic Description = Chalcocite and malachite bearing veinlets in lower part 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 Nizina

Comments on the workings information

  • Workings / Exploration = No workings.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011716
USGS Alaska Resource Data File ARDF MC147

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, 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 = MacKevett and Smith, 1972

General comments

Subject category Comment text
Deposit Model Name = Lode: vein.

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