Unnamed (on Eleanor Island)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Zn
Ore minerals chalcopyrite; pyrrhotite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-2
Latitude 60.5377
Longitude -147.5678
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located in the SW1/4 section 8, T. 5 N., R. 11 E., of the Seward Meridian. It is situated at sea level on the south shore of Eleanor Island. This is location 119 of MacKevett and Holloway (1977), location 195 of Cobb and Tysdal (1980), and location S-85 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence consists of a shear zone containing a series of thin layers and lenses of massive pyrrhotite, along with chalcopyrite and sphalerite. The host rock is Tertiary Orca Group slate and pillow basalt (Cobb and Tysdal, 1980). Workings on the prospect consist of two adits that connect underground and total 80 feet in length.
Tysdal (1978 [MF-880-A]) reported assay results of 5 ppm silver, 2,000 ppm copper, 500 ppm lead, and 1,700 ppm zinc. The U.S. Bureau of Mines collected a single 5-foot chip sample that contained 515 ppm copper and 460 ppm zinc (Jansons and others, 1984).
Geologic map unit (-147.569777935044, 60.5370775175043)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization Tertiary or younger; the occurrence is in slate near pillow basalt in the Orca Group of Tertiary age.

Production and reserves

Workings or exploration The workings on this prospect consist of two adits that connect underground and total 80 feet in length (Jansons and others, 1984). Tysdal (1978 [MF-880-A]) reported assay results of 5 ppm silver, 2,000 ppm copper, 500 ppm lead, and 1,700 ppm zinc. The U.S. Bureau of Mines collected a single 5-foot chip sample that contained 515 ppm copper and 460 ppm zinc (Jansons and others, 1984).
Indication of production None

References