Tin Creek-Tributary

Occurrence in Alaska, United States with commodities Copper, Zinc

Geologic information

Identification information

Deposit ID 10002589
MRDS ID A015026
Record type Site
Current site name Tin Creek-Tributary
Related records 10210038

Geographic coordinates

Geographic coordinates: -153.66674, 62.46254 (WGS84)
Relative position The Tin Creek-Tributary occurrence is located in a small, unnamed tributary gulch of Tin Creek at an elevation of approximately 2,800 feet (854 m) in the NE1/4 sec. 2, T. 27 N., R. 24 W., of the Seward Meridian. The location corresponds to mineral occurrence no. 2 of Cobb (1972), and is located to within 1,000 feet (305 m).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Zinc Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -153.66674, 62.46254

Comments on the geologic information

  • Geologic Description = At the Tin Creek-Tributary occurrence, chalcopyrite and other sulfides are localized within one foot of a malachite-stained shear zone that extends for about 6 meters along dip. The shear zone cuts calcareous clastics of the mid-Silurian Terra Cotta Mountains Sandstone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). ? Sulfide grab samples contain 0.70 percent copper and 0.15 percent zinc. Nearby stream cobbles contain pyrrhotite, with minor sphalerite and chalcopyrite. Placer concentrates contain anomalous copper and zinc in the nearby stream gulch that cuts the mineralized shear zone (Cobb, 1972).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Sulfide grab samples contain up to 0.70 percent copper and 0.15 percent zinc. Nearby stream cobbles contain pyrrhotite and minor sphalerite. Placer concentrates contain anomalous copper and zinc in a stream gulch that cuts the mineralized area.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015026
USGS Alaska Resource Data File ARDF MG040

Bibliographic references

  • Deposit

    Reed, B.L. and Elliott, R.L., 1968, Geochemical anomalies and metalliferous deposits between Windy Fork and Post River, southern Alaska: U.S. Geological Survey Circular 596, 22 pages.

  • Deposit

    Bundtzen, T.K., Kline, J.T., and Clough, J.G., 1982, Preliminary geologic map of the McGrath B-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File report 149, 22 pages, one sheet, scale 1:63,360.

  • Deposit

    Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic Map of the eastern McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14, 34 pages, one sheet, scale 1:125,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Reed and Elliott, 1968 (C 596)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 06-NOV-1998 T.K. Bundtzen Pacific Rim Geological Consulting