Unnamed (northwest of head of Jay Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Mo
Ore minerals chalcopyrite; magnetite; tetrahedrite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-3
Latitude 67.4231
Longitude -151.2809
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located about 6 miles southeast of Mathews Dome and 2 miles northeast of the junction of Jay and Rye Creeks. The occurrence is at an elevation of about 4,000 feet, at about the center of section 14, T. 30 N., R. 17 W., of the Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of sulfide-bearing greenschist. Dillon and others (1981, sample 477 [AOF 133B]) collected a rock sample of fine-grained greenschist containing disseminated chalcopyrite and possibly tetrahedrite. The sample contains 11.0 ppm silver, 1,360 ppm copper, and 320 ppm molybdenum. A rubble sample collected by the Bureau of Land Management at this location consists of greenschist with disseminated chalcopyrite and magnetite, but no tetrahedrite (Kurtak and others, 1999, Plate 1, Map no. 93). They also collected an outcrop sample of quartz-chlorite-magnetite schist. Analyses of these samples shows no valuable metals.
Geologic map unit (-151.283641210221, 67.4226504549286)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References