Unnamed (Perry Island)

Occurrence, Inactive

Commodities and mineralogy

Main commodities W
Ore minerals pyrite; scheelite
Gangue minerals epidote; mica; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-3
Latitude 60.6943
Longitude -147.8467
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located in the SE1/4 section 15, T. 7 N., R. 9 E., of the Seward Meridian. It is situated on the southeast side of Perry Island near Billings Point. This is location S-98 of Jansons and others (1984). This location is accurate to within half a mile.

Geologic setting

Geologic description

This occurrence consists of several scheelite-bearing granitic and aplite dikes near the contact between hornfeldsed Orca Group sedimentary rocks of Tertiary age and Eocene granite (Kurtak and Jeske, 1986). The dikes are stained with limonite and locally contain epidote, pyrite, and scheelite. A 2-foot wide chip sample collected by the U.S. Bureau of Mines contained 0.43 ppm tungsten. Other chip samples contained as much as 5 ppm tungsten (Jansons and others, 1984).
Geologic map unit (-147.848774410615, 60.6937735433517)
Age of mineralization Eocene; the occurrence is in Eocene granitic rock.

Production and reserves

Indication of production None

References