|Quadrangle map, 1:250,000-scale||NM|
|Quadrangle map, 1:63,360-scale||B-1|
|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 descriptionBedrock 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.|
|Workings or exploration||Quarries for road construction materials are present in the Cape Nome area.|
|Indication of production||None|
Additional commentsCape Nome is an important locale for heavy riprap; riprap may be hauled on trucks or loaded on barges at the base of the cliff.
Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Patrick, B.E., and McClelland, W.C., 1995, Late Proterozoic granitic magmatism on Seward Peninsula and a Barentian origin for Arctic Alaska-Chukotka: Geology, v. 23, p. 81-94.
Sainsbury, C.L., Hummel, C.L., and Hudson, Travis, 1972, Reconnaissance geologic map of the Nome quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-326, 28 p., 1 sheet, scale 1:250,000.
|Reporters||C.C. Hawley and Travis L. Hudson|
|Last report date||7/10/2000|