Unnamed (in the headwaters of Nutmoyuk Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Pb
Other commodities Sn
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale B-1
Latitude 65.26
Longitude -162.361
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridge crest along the north side of Death Valley between the headwaters of Nutmoyuk Creek and north tributaries to the Tubutulik River. It is about 1,500 feet north of elevation 1,920 and 3,000 feet northeast of the pass at the head of Nutmoyuk Creek (see BN086). It is locality 42 of Gamble (1988).

Geologic setting

Geologic description

This is an area of marble and calc-silicate rock in the eastern-most Bendeleben Mountains. The carbonate rocks here are separated from other high-grade metamorphic rocks to the west by a high-angle fault that crosses the ridge at the saddle between Nutmoyuk Creek and Death Valley (Till and others, 1986). A sample of pyrite-bearing siliceous rock contained 5 ppm Ag, 500 ppm Pb, 1,200 ppm As, 70 ppm Bi, and 70 ppm Sn (Gamble, 1988). A sample of a pyrite-fluorite vein in calc-silicate rock here contained 0.5 ppm Au (Gamble, 1988).
Geologic map unit (-162.363633131966, 65.2593022839355)
Mineral deposit model Polymetallic mineralization in siliceous rock
Age of mineralization Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.

Production and reserves

Workings or exploration It is not known it exploration activities have been undertaken here. Mining claims existed in the area in 1975 (see BN086).
Indication of production None

References