Unnamed (south of lower Windy Creek)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10308758
MRDS ID A011360
Record type Site
Current site name Unnamed (south of lower Windy Creek)

Geographic coordinates

Geographic coordinates: -147.36275, 63.08962 (WGS84)
Relative position This occurrence is at an elevation of about 4,800 feet on a ridge about 2.2 miles south of lower Windy Creek. The site is in the SE1/4 of sec. 16, T. 21 S., R. 2 E., of the Fairbanks Meridian.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Azurite Ore
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Covellite Ore
Copper Ore
Epidote Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Propylitic alteration of greenstone.

Nearby scientific data

(1) -147.36275, 63.08962

Comments on the geologic information

  • Geologic Description = The general area of this occurrence is underlain by the Middle or Upper Triassic Nikolai Greenstone, which consists of massive, subaerial and submarine basalt flows and minor interbedded volcaniclastic sedimentary rocks, aquagene and epiclastic tuff, breccia, argillite, and radiolarian chert (Nokleberg and others, 1992). The occurrence is in greenstone and consists of a small, hydrothermally altered shear zone containing epidote, copper sulfide minerals, and possibly native copper and an iron carbonate mineral. Weathering locally produces malachite and azurite-coated float and encrustations.
  • Age = Triassic or younger.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Surface chip sampling only.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF HE214

Bibliographic references

  • Deposit

    Kaufman, M.A., 1964, Two new occurrences of ore minerals in the Denali area (Healy A-1 and Mt. Hayes B-6): Alaska Territorial Department of Mines Prospect Evaluation 67-4, 5 p.

  • Deposit

    Glavinovich, P.S., 1967, Trace element copper distribution and areal geology in a portion of the Clearwater Mountains, Alaska: University of Alaska Minerals Industry Research Laboratory, Report 10, 55 p.

  • Deposit

    Smith, T.E., 1981, Geology of the Clearwater Mountains, south-central Alaska: Alaska Division of Geological &Geophysical Surveys Geologic Report 60, 72 p., 3 sheets, scale 1:63,360.

  • Deposit

    Nokleberg, W.J., and others, 1992, Circum-North Pacific terrane map, in Tracy, K.V., Anker, E. M., Ryan, C., Hoffman, V. , eds., International conference on Arctic margins, p. 44.

  • Deposit

    Saunders, R.H., 1961, Susitna-MacClaren area: Alaska Division of Mines and Mineral Report for the year 1961, 40 p.

Comments on the references

  • Primary Reference = Glavinovich, 1967

General comments

Subject category Comment text
Deposit Model Name = Hydrothermally altered shear zone.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 D.L. Stevens (Stevens Exploration Management Corporation) Stevens Exploration Management Corporation