Cape Nome

Occurrence, Inactive

Commodities and mineralogy

Other commodities Au; Cr; F; W
Ore minerals chromite; fluorite; goethite; gold; scheelite
Gangue minerals biotite; chlorite; garnet; muscovite; sericite; sphene

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale B-1
Latitude 64.4371
Longitude -165.0073
Nearby scientific data Find additional scientific data near this location
Location and accuracy Cape Nome is on the coast of Norton Sound 12.5 miles southeast of Nome. The map location is at an elevation of about 250 feet on the north side of the Nome-Council road, in section 23, T. 12 S., R. 32 W., Kateel River Meridian. This is locality 55 of Cobb (1972 [MF 463], 1978 [OFR 78-93]); the location is probably accurate to within 1 mile.

Geologic setting

Geologic description

Bedrock at Cape Nome is mostly granitic orthogneiss (Sainsbury, Hummel, and Hudson, 1972 [OFR 72-326]). In an investigation of the orthogneiss for radioactive minerals, heavy mineral analysis revealed trace amounts of chromite (one location), fluorite, and possibly scheelite (White and others, 1953). Gold, claims have been located in the Cape Nome area (Kardex site Kx 286, Heiner and Porter, 1972). The orthogneiss reportedly is late Precambrian in age (Patrick and McClelland, 1995).
Geologic map unit (-165.009905679829, 64.43634146216)
Mineral deposit model Accessory minerals in Precambrian orthogneiss.
Age of mineralization Patrick and McClelland (1995) report a uranium/lead age for the orthogneiss at Cape Nome of 676 +/- 15 million years.

Production and reserves

Workings or exploration Quarries for road construction materials are present in the Cape Nome area.
Indication of production None

Additional comments

Cape Nome is an important locale for heavy riprap; riprap may be hauled on trucks or loaded on barges at the base of the cliff.

References