Unnamed Occurrence (ARDF - WI011; between Sirr Creek and Wild Lake), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - WI011; between Sirr Creek and Wild Lake)	- not defined -
Koyukuk Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is located on a ridge between Sirr Creek and Wild Lake, about 3.8 miles south-southeast of Sirr Mountain. The occurrence is at an elevation of about 2,900 feet about 0.4 mile south-southwest of the center of section 9, T. 31 N,, R. 18 W., of the Fairbanks Meridian. The occurrence is the site of sample 128 of Chipp (1972). Several other samples were collected for about 1.5 miles up the ridge to the north by Chipp, and Kurtak and others (1999). The location is accurate.
Geology: This occurrence consists of mineralized quartz veins and altered calcareous schist (Chipp, 1972; Kurtak and others, 1999; Dillon and others, 1981 [AOF 133B]). Samples, including float contain one or more of the following metalliferous minerals: galena, chalcopyrite, malachite, pyrite, and tetrahedrite, and other unspecified sulfides. One sample (Chipp, 1972, sample 128), of altered calcareous-schist with vein quartz and unspecified sulfides contains 0.52 ppm gold, 31 ppm silver, 1% antimony, 9,700 ppm copper, 2,400 ppm lead, and 1,000 ppm zinc. The rocks in the area are Devonian schist and phyllite (Chipp, 1972).
Workings: Only surface sampling.
Alteration: Chipp (1972) and Dillon and others (1981 [AOF 133B] ) described some of the samples as altered calcareous-schist, but did not describe the alteration.

Commodities (Major) - Ag, Au, Cu, Sb; (Minor) - Pb, Zn
Development Status: None
Deposit Model: Polymetallic vein (?) (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	WI011

Other Regions, Features and Areas containing this locality

References