Dewey Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities W
Ore minerals gold; magnetite; scheelite
Gangue minerals garnet

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-1
Latitude 64.6309
Longitude -165.2647
Nearby scientific data Find additional scientific data near this location
Location and accuracy This alluvial gold placer mine is on Dewey Creek, an east tributary to Nome River. The map location is at an elevation of about 150 feet, in the southwest corner of section 10, T. 10 S., R. 33 W., Kateel River Meridian. It is locality 114 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description

Gold was discovered on Dewey Creek by 1900; it was in 3 feet of auriferous gravel on a sandy clay layer overlain by 1 foot of sandy blue clay and 1 foot of muck. The gold is accompanied by considerable scheelite and garnet and some magnetite (Brooks and others, 1901). Some mining apparently took place in 1903 (Collier and others, 1908). Dewey Creek is near the northeast extension of the Anvil fault; this fault juxtaposes massive marble against marble and schist in this area. These rocks may in part correlate with the Casadepaga Schist (Hummel, 1962 [MF 247]; Bundtzen and others, 1994). Locally, the Anvil Creek fault is a mineralized structure (for example, NM234) containing stibnite and possibly gold.
Geologic map unit (-165.267312022891, 64.6301391099787)
Mineral deposit model Alluvial placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Some small-scale surface placer workings are probably present.
Indication of production Yes; small