Unnamed Occurrence (ARDF - MH062; on peak 6275), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MH062; on peak 6275)	- not defined -
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

Location: This occurrence is on the divide between the West Fork Maclaren River and upper Cottonwood Creek. It is at an elevation of about 6,200 feet on the south side of peak 6275 and near the center of the S1/2SW1/4 section 18, T. 19 S., R. 6 E., Fairbanks Meridian. The location corresponds to locality 28 in table 2 of Nokleberg and others (1991).
Geology: The rock at this the occurrence is metabasalt of the Nikolai Greenstone of Late Triassic age. The occurrence is a narrow quartz-epidote vein that contains pyrite and possibly chalcopyrite. A grab sample of vein material contained 5 parts per million (ppm) silver and 0.1 ppm gold (Nokleberg and others, 1991). Similar quartz-epidote veins near this site contain chalcopyrite or other copper minerals; copper was not, however, reported in the analysis from the occurrence on peak 6275.
Workings: There are no workings reported at this site.
Age: Younger than Late Triassic; probably Cretaceous or early Tertiary (see MH060).

Commodities (Major) - Ag, Au; (Minor) - Cu (?)
Development Status: None
Deposit Model: Copper-bearing low-sulfide quartz vein. Basaltic Cu (Cox and Singer, 1986; mode

Other Databases

Link to USGS - Alaska:	MH062

Other Regions, Features and Areas containing this locality

References