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  3. Mineral Resource Data System (MRDS)

Unnamed (headwall cirque of Windy Creek)

Occurrence in Alaska, United States with commodity Copper
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10307601
Record type Site
Current site name Unnamed (headwall cirque of Windy Creek)

Geographic coordinates

Geographic coordinates: -147.11175, 63.11163 (WGS84)
Relative position This occurrence is at an alevation of about 4,900 feet in the headwall of a cirque at the head of Windy Creek. The map site is in the NE1/4 of sec.11, T. 21 S., R. 3 E., of the Fairbanks Meridian. The location is accurate to within 500 feet.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Healy A-1(quadrangle 1:63,360 scale)

Mount Hayes SW(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Susitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcocite Ore
Epidote Gangue

Alteration

  • (Local) Propylitic alteration (epidote).

Nearby scientific data

(1) -147.11175, 63.11163
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The bedrock in the area of this occurrence is mainly the Middle or Upper Triassic Nikolai Greenstone, a thick sequence of subaerial and submarine basalt flows and minor interbedded volcaniclastic sedimentary rocks, aquagene and epiclastic tuff, breccia, argillite, and radiolarian chert (Nokleberg and others, 1992). This occurrence is a dome-shaped epidotized zone exposed above the bergschrund on the headwall of the cirque. The altered area is several hundred feet across. The occurrence is float on the moraine and consist of slabs of chalcocite as large as 15 inches by 10 inches by 2 to 3 inches (D. L. Stevens, personal observation).
  • Age = Triassic or younger.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Reference information

Bibliographic references

  • 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.

Comments on the references

  • Primary Reference = This record

General comments

Subject category Comment text
Deposit Other Comments = Outcrop source of chalcocite has not been found.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 D.L. Stevens Stevens Exploration Management Corporation

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.