Unnamed (head of Rock Creek)

Occurrence in Alaska, United States with commodities Lead, Zinc, Silver

Geologic information

Identification information

Deposit ID 10001071
MRDS ID A011753
Record type Site
Current site name Unnamed (head of Rock Creek)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -143.87947, 61.64466 (WGS84)
Relative position 1.2 mi northeast of Dixie Pass. Best location: MacKevett and others, 1978, loc. 17. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Lead Primary
Zinc Primary
Silver Secondary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore

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

Nearby scientific data

(1) -143.87947, 61.64466

Comments on the geologic information

  • Geologic Description = Altered zone about 2 m thick, containing sphalerite and galena, in Triassic Chitistone Limestone near fault contact with 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 Chistochina

Comments on the workings information

  • Workings / Exploration = Type of workings: surface. Grab sample (MacKevett, 1976) assayed >5,000 ppm Mn, 15 ppm Ag, 70 ppm Cd, 20 ppm Mo, 3,000 ppm Pb, >10,000 ppm Zn.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011753
USGS Alaska Resource Data File ARDF MC039

Bibliographic references

  • 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.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, scale 1:63,360.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.

Comments on the references

  • Primary Reference = MacKevett, 1976

General comments

Subject category Comment text
Deposit Model Name = Lode: vein, shear zone

Reporter information

Type Date Name Affiliation Comment
Reporter 22-SEP-1997 Leonard, K.R. U.S. Geological Survey
Reporter 22-SEP-1997 Elliott, R.L. U.S. Geological Survey
Reporter 22-SEP-1997 Richter, D.H. U.S. Geological Survey