Shower Gulch

Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001070
MRDS ID A011752
Record type Site
Current site name Shower Gulch
Alternate or previous names Copper King, Keystone
Related records 10137055

Geographic coordinates

Geographic coordinates: -143.71364, 61.7266 (WGS84)
Relative position 3,000 ft downstream from the headwaters of Shower Gulch, a tributary of Kotsina River. Best location: MacKevett and others, 1978, loc. 7. Accurate within radius of 100 feet.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • Ore Material = Copper (native)

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Copper Ore
Epidote Gangue
Quartz Gangue

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) -143.71364, 61.7266

Comments on the geologic information

  • Geologic Description = Native Cu, associated with epidote and chalcocite, in compact quartz stringers and lenses filling amygdules in Triassic Nikolai Greenstone. Sparsely disseminated native Cu and minor chalcopyrite also occur in the greenstone. Mineralization restricted to upper amygdaloidal parts of flows that range from 5 to 25 feet thick.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Type of workings: surface. Open-cuts.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011752
USGS Alaska Resource Data File ARDF MC023

Bibliographic references

  • Deposit

    Mendenhall, W.C., 1905, Geology of the central Copper River region, Alaska: U.S. Geological Survey Professional Paper 41, 133 p.

  • Deposit

    Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.

  • 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., 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 = Moffit and Mertie, 1923

General comments

Subject category Comment text
Deposit Model Name = Basaltic Cu

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