Day Harbor

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cr; Ni
Gangue minerals olivine; pyroxene

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-6
Latitude 60.0232
Longitude -149.1755
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located in N1/2 section 7, T. 2 S., R. 2 E., of the Seward Meridian at an elevation of about 1,000 feet. It is located on the east side of the ridge on the east side of Talus Bay, north side of Day Harbor. This is location 97 of Tysdal (1978 [MF-880-A]) and location S-189 of Jansons and others (1984). This location is accurate to within half a mile.

Geologic setting

Geologic description

The occurrence is a serpentinized dunite that contains 3,000 ppm chrome and 5,000 ppm nickel (Tysdal, 1978 [MF-880-A]). Nelson and others (1985) mapped the dunites in this area as the Resurrection Bay Ophiolite sequence of the Valdez Group of Late Cretaceous age.
Geologic map unit (-149.177634504525, 60.0226425497929)
Mineral deposit model Podiform chromite (Cox and Singer, 1986; model 8a)
Mineral deposit model number 8a
Age of mineralization Cretaceous or younger; the dunite is Late Cretaceous in age.
Alteration of deposit The dunite is serpentinized.

Production and reserves

Workings or exploration A single sample contained 3,000 ppm chrome and 5,000 ppm nickel (Tysdal, 1978 [MF-880-A]). No workings or improvements are present.
Indication of production None