Azurite Occurrence, Valdez Creek Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Azurite Occurrence	Occurrence
Valdez Creek Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

This is a copper occurrence typical of the Nikolai Greenstone.
Location: This occurrence is at an elevation of about 3,750 feet in a north-flowing tributary to the East Fork Maclaren River and about 3 miles southwest of the terminus of the Eureka Glacier. The occurrence is in the SW1/4SE1/4 section 16, T. 18 S., R. 7 E., Fairbanks Meridian.
Geology: The rock at this occurrence is metabasalt of the Nikolai Greenstone of Late Triassic age. This formation was mapped as the Amphitheater Basalt by Rose (1966 [ADMM GR 20]). At this locality a 30- by 50-foot area contains abundant copper-stained and pyrite-bearing basalt. Two samples from this site contain 578 and 697 parts per billion (ppb) gold, 31 and 69 parts per million silver, 31 and 108 ppb palladium, and 7.8 and 15.3 percent copper (W.T. Ellis, oral communication, 2001).
Workings: The occurrence is on active claims of MAN Resources. Two samples from this site contain contain 578 and 697 parts per billion (ppb) gold, 31 and 69 parts per million silver, 31 and 108 ppb palladium, and 7.8 and 15.3 percent copper (W.T. Ellis, oral communication, 2001).
Age: Cretaceous or younger.
Alteration: Chlorite-epidote alteration of the volcanic host rock; local oxidation of copper minerals.

Commodities (Major) - Ag, Au, Cu; (Minor) - Pd
Development Status: None
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23).

Other Databases

Link to USGS - Alaska:	MH098

Other Regions, Features and Areas containing this locality

References