Mt. Fairplay

Prospect in Alaska, United States with commodities Copper, Gold, Molybdenum, Lead, Zinc
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. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001747
MRDS ID A012531
Record type Site
Current site name Mt. Fairplay
Alternate or previous names Fairplay
Related records 10136649

Geographic coordinates

Geographic coordinates: -142.24266, 63.68974 (WGS84)
Relative position The Fairplay prospects are in a large block of claims that cover about 20 square miles on Mount Fairplay. The center of most activity is in section 14, T. 22 N., R. 16 E., of the Copper River Meridian, and is location 5 of Singer and others (1976), and location 6 of Eberlein and others (1977). The Taylor Highway passes just to the west of Mt. Fairplay, and much of the claim block is easily accessible by this road. The location is accurate.

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tanacross C-3(quadrangle 1:63,360 scale)

Tanacross NW(quadrangle 1:100,000 scale)

Tanacross C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Molybdenum Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Hydrothermal alteration (Singer and others, 1976).

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

  • Host or associated Host
    Rock type
    Stratigraphic age (youngest) Tertiary
    Chronological age 70
    Dating method K-Ar
    Type of media Syenite

Nearby scientific data

(1) -142.24266, 63.68974

Economic information

Comments on the geologic information

  • Geologic Description = The Fairplay prospects consist of disseminated chalcopyrite, galena, molybdenite, pyrite, and sphalerite that occur in hydrothermally altered Tertiary hypabyssal syenite and associated felsic volcanic rocks (Singer and others, 1976). Syenite that intrudes the felsic volcanic rocks at Mt. Fairplay has a K/Ar age of 67 +/- 2 Ma and contains minor gold-bearing quartz veins (Kerin, 1976; Wilson and others, 1985; Newberry and others, 1996). The Fairplay prospect area was staked in the early 1970's, and there are other similar prospects nearby (Singer and others, 1976). The syenite complex at Mt. Fairplay is similar to others in the Carmacks metallogenic belt of the Mount Nansen-Cash area in the Yukon Territory (Indian and Northern Affairs Canada, 1989).
  • Age = The syenite at Mt. Fairplay is about 70 Ma, based on K-Ar ages (Kerin, 1976). The felsic intrusive and extrusive rocks that host the syenite are Tertiary.
  • Age = Host rock is Tertiary.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Fortymile

Comments on the workings information

  • Workings / Exploration = Surface exploration was conducted and silt and soil samples were taken by WGM Inc. in 1975-76. More recent activity is very probable.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Singer and others, 1976

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Mo deposit (Cox and Singer, 1986; model 21a)
Deposit Other Comments = Part of the Mt. Fairplay region lies on Doyon Ltd. selected lands. For more information, contact Doyon Ltd.

Reporter information

Type Date Name Affiliation Comment
Reporter 13-APR-99 Cameron, C.E. Alaska Division of Geological and Geophysical Surveys

Beyond USGS

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

Authoritative Alaska resources

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