Unnamed Occurrence (ARDF - MH204; southeast flank of Paxson Mountain), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MH204; southeast flank of Paxson Mountain)	- not defined -
Chistochina Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is at an elevation of 4,500 feet approximately one-half mile southeast of the top of Paxson Mountain. It is in an east-flowing creek in the NE1/4SE1/4 section 14, T. 22 S., R. 11 E., Fairbanks Meridian. This site corresponds to locality S97 in table 2 of Nokleberg and others (1991).
Geology: At this locality bornite occurs in 1-centimeter-wide quartz veins that cut Nikolai Greenstone metabasalt of Late Triassic age (Nokleberg and others, 1991). Copper minerals also occur in amygdules in metabasalt. A composite chip sample across a 6.5-foot zone of malachite and azurite in amygdules contained 2.6 percent copper and 20 parts per million silver (Nokleberg and others, 1991).
Workings: A composite chip sample across a 6.5-foot zone of malachite and azurite in amygdules contained 2.6 percent copper and 20 parts per million silver (Nokleberg and others, 1991).
Age: Late Triassic and Cretaceous.
Alteration: The vesicular basalt host rock is altered in part to chlorite and epidote; copper mineral(s) are oxidized.

Commodities (Major) - Ag, Cu
Development Status: No
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23).

Other Databases

Link to USGS - Alaska:	MH204

Other Regions, Features and Areas containing this locality

References