Unnamed Occurrence (ARDF - WI065; near Allen River), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - WI065; near Allen River)	- not defined -
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: The occurrence is on Allen River, 0.4 mile downstream from the mouth of McCamant Creek. The occurrence is sample 237 in Dillon and others (1981 [AOF 133B]). The location is accurate within one-half mile.
Geology: Brosge and Reiser (1960) noted copper sulfides and malachite in Upper Devonian black phyllite and slate on the Allen River near the mouth of McCamant Creek. Dillon and others (1981, sample 237 [AOF 133B]) collected a sample of mineralized, metaclastic quartzite on Allen River less than 0.5 mile downstream from McCamant Creek. The sample contained disseminated(?) chalcopyrite and sphalerite, secondary malachite and azurite, and possibly rutile and cassiterite. A sample contains 5,000 ppm copper, 320 ppm zinc, and 200 ppm nickel. The rocks in the area are Middle or Upper Devonian(?) phyllite and dolomite, with lesser metasandstone, marble, and conglomerate (Dillon and others, 1986).
Workings: Only surface sampling.
Alteration: Oxidation of copper minerals(s).

Commodities (Major) - Cu, Zn; (Minor) - Ni, Sn(?), Ti(?)
Development Status: None
Deposit Model: Polymetallic vein (?) (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	WI065

Other Regions, Features and Areas containing this locality

References