Chirikof Island

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale TI
Latitude 55.9
Longitude -155.56
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is the beach area on the north and northeast coast of Chirikof Island (MacKevett and Holloway, 1977, locality 3). The island is shown on an inset on the USGS Trinity Island 1:250,000 scale quadrangle map.

Geologic setting

Geologic description

Black sands occur along the northeast coast and at the extreme north end of the island for a distance of approximately 10 miles (Gassaway, 1935). These sands commonly occur as thin surface crusts on the beaches near high-tide levels. Some crusts were also noted on local sand dunes. On the northern tip of the island a narrow strip of black sand about 6 inches thick and extending about 1/8 mile was noted. The presence of gold in the black sands was found to be very sporadic as indicated in panned samples taken by Gassaway.
Geologic map unit (-155.562237040351, 55.8992542578037)
Mineral deposit model Gold placer (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary

Production and reserves

Workings or exploration The beach areas had been prospected prior to 1935 (Gassaway). U.S. Bureau of Mines claim map shows no apparent activity after 1950.
Indication of production None

References