Unnamed (Arctic Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite
Gangue minerals pyrite; quartz

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale C-6
Latitude 65.646
Longitude -164.688
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridge crest at the head of Arctic Creek, 3.8 miles southeast of Taylor on the Nome-Taylor road. Sainsbury and others (1969) report mineralization in marble outcrops just to the east of the road here. This is locality 3 of Cobb (1972; MF 417; 1975; OFR 75-429).

Geologic setting

Geologic description

Marble interlayered in pelitic schist forms outcrops just east of the Nome-Taylor road. Sainsbury and others (1969) describe replacements of marble by banded, fine-grained silica containing pyrite and traces of chalcopyrite. Although mapped as klippe by Sainsbury and others (1969), the marble is interlayered with schist and part of a low grade, Lower Paleozoic metasedimentary assemblage (Till and others, 1986).
Geologic map unit (-164.690692406715, 65.6452756111208)
Mineral deposit model Siliceous zones in marble with pyrite and traces of chalcopyrite
Age of mineralization Unknown but possibly Cretaceous; the major episode of epigenetic mineralization on Seward Peninsula accompanied higher temperature metamophism and mid- to Late Cretaceous granitic plutonism in the region.
Alteration of deposit Silica replacements of marble?

Production and reserves

Workings or exploration Some shallow prospecting pits may be present.
Indication of production None

References