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  3. Mineral Resource Data System (MRDS)

Unnamed (between upper West Fork and Yanert glaciers)

Occurrence in Alaska, United States with commodities Gold, 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. Mineral occurrence model information
  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 10307549
Record type Site
Current site name Unnamed (between upper West Fork and Yanert glaciers)

Geographic coordinates

Geographic coordinates: -147.2968, 63.58964 (WGS84)
Relative position This occurrence is at an elevation of about 6,300 feet, about midway between upper West Fork and Yanert Galciers. The map site is about 3.9 miles south-southwest of Mount Deborah, in the NE1/4 of sec. 26, T. 15 S., R. 2 E., of the Fairbanks Meridian. The location is accurate to within 2,000 feet. This is location 27 of Sherwood and others (1976).

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Mount Hayes NW(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)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore

Mineral occurrence model information

Model code 91
USGS model code 24b
Deposit model name Massive sulfide, Besshi (Japanese deposits)
Mark3 model number 30

Nearby scientific data

(1) -147.2968, 63.58964
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this occurrence are Upper Triassic calcareous shale, argillite, sandstone, siltstone, and limestone cut by numerous dikes, sills, and plugs of altered diabase and gabbro (Wilson and others, 1998). The deposit apparently consists of disseminations of chalcopyrite in metasedimentary rocks near the contact of altered gabbro. Samples of the chalcopyrite-bearing rock contained 980 ppm copper and 0.2 ppm gold (Sherwood and others, 1976).
  • Age = Late Triassic or younger.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Surface exploration only.

Reference information

Comments on the references

  • Primary Reference = Sherwood and others, 1976

General comments

Subject category Comment text
Deposit Model Name = Besshi massive sulfide(?) (Cox and Singer, 1986; model 24b)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 N. Van Wyck 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.