Unnamed Occurrence (ARDF - HE078; south of Windy Creek), Bonnifield Mining District, Denali Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - HE078; south of Windy Creek)	- not defined -
Bonnifield Mining District	Mining District
Denali Borough	Borough
Alaska	State
USA	Country

Location: This occurrence is at an elevation of about 3,900 feet, about 0.6 mile southwest of Windy Creek changes from east to southeast. The site is at the NE corner of sec. 8, T. 17 S., R. 8 W., of the Fairbanks Meridian. The location is accurate to within 3000 feet. This is location 2 of Hickman and Craddock (1976).
Geology: The country rocks in the area of this occurrence are Devonian to Ordovician interbedded argillite and limestone, intruded by small plugs of Upper Cretaceous to Lower Tertiary quartz diorite. The occurrence consists of chalcopyrite-bearing skarn zones adjacent to the stocks. Weathering zones has produced limonite gossan and malachite. Samples contain 1,900 ppm copper and 0.6 ppm silver (Hickman and Craddock, 1976).
Workings: Surface sampling only. Samples contain 1,900 ppm copper and 0.6 ppm silver (Hickman and Craddock, 1976).
Age: Probably Late Cretaceous or younger.
Alteration: Weathering of skarn to produce secondary iron and copper minerals.

Commodities (Major) - Cu; (Minor) - Ag
Development Status: None
Deposit Model: Cu skarn (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	HE078

Other Regions, Features and Areas containing this locality

References