Mount Fairplay, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Mount Fairplay	Group of Prospects
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

Part of the Mt. Fairplay region lies on Doyon Ltd. selected lands.

Location: 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.

Geology: 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. 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, 1987).

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

Alteration: Hydrothermal alteration.

Commodities (Major) - Cu; (Minor) - Au, Mo, Pb, Zn
Development Status: None
Deposit Model: Porphyry Cu-Mo deposit (

Other Databases

Link to USGS - Alaska:	TC008

Other Regions, Features and Areas containing this locality

References