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  3. Mineral Resource Data System (MRDS)

Unnamed (south wall of valley 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 10307597
Record type Site
Current site name Unnamed (south wall of valley of Windy Creek)

Geographic coordinates

Geographic coordinates: -147.36175, 63.10363 (WGS84)
Relative position This occurrence is at an elevation of about 4,400 feet on the south wall of the valley of Windy Creek. It is about 3.75 miles east northeast of Susitna Lodge, in the SE1/4 of sec. 9, T. 21 S., R. 2 E., of the Fairbanks Meridian. The location is shown as site 29 in Smith (1981). 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

Comments on the commodity information

  • Gangue = iron carbonate

Materials information

Materials Type of material
Azurite Ore
Chalcopyrite Ore
Malachite Ore
Epidote Gangue

Alteration

  • (Local) Propylitic alteration of greenstone.

Nearby scientific data

(1) -147.36175, 63.10363
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 small mineral occurrence consists of a small shear zone along which hydrothermal alteration has produced epidote, chalcopyrite, and iron carbonate minerals. Weathering produces malachite- and azurite-coated float and encrustations. This small mineral occurrence is one of many similar deposits in the Nikolai Greenstone. Most of these occurrences are part of an east-northeast trending fault zone several miles wide.
  • 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

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-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.