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  3. Mineral Resource Data System (MRDS)

Glacier Fork

Occurrence in Alaska, United States with commodities Silver, Gold, Copper, Tungsten
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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. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10308770
MRDS ID D002741
Record type Site
Current site name Glacier Fork
Alternate or previous names Knik River - Glacier Fork
Related records 10009652

Geographic coordinates

Geographic coordinates: -148.20264, 61.58957 (WGS84)
Relative position Near the headwaters of Glacier Fork of the Knik River, near western edge of unnamed glacier. Accurate within 2,500 ft. Locality M-13 of Richter (1967), locality 47 of Cobb (1972), and locality 36 of MacKevett and Holloway (1977).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Anchorage C-4(quadrangle 1:63,360 scale)

Anchorage NE(quadrangle 1:100,000 scale)

Anchorage C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Matanuska(hydrologic unit)

Knik Arm(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Tungsten Critical Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Scheelite Ore
Quartz Gangue

Alteration

  • Metasedimentary rocks are iron-stained (Richter, 1967).

Mineral occurrence model information

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

Nearby scientific data

(1) -148.20264, 61.58957
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Abundant irregular quartz veins found in iron-stained metasedimentary rocks of the Late Cretaceous Valdez Group and in an adjacent Tertiary quartz diorite stock. The quartz veins contain pyrrohotite and small amounts of chalcopyrite. Assays of vein and float samples show 0.02 oz/ton Au and 0.08 to 0.26 oz/ton Ag (Richter, 1967).
  • Age = The veins are Tertiary or younger, based on geologic relationships.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Anchorage

Comments on the workings information

  • Workings / Exploration = Richter (1967) reported assays of vein and float samples show 0.02 oz/ton Au and 0.08 to 0.26 oz/ton Ag. Stream-sediment samples taken downstream contained scheelite.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Richter, 1967

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)
Deposit Other Comments = Cobb (1972) also notes four localities (110, 111, 112, and 113) spread along Glacier Fork. These all appear to be stream-sediment samples that contained scheelite. Deposit does not appear rich enough or large enough to warrant further prospecting (Richter, 1967).

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff; S.W. Huss U.S. Geological Survey

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.