Ketchem Dome Area

Mines, Active

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Hg; Sn; W
Ore minerals cassiterite; cinnabar; gold; scheelite; silver

Geographic location

Quadrangle map, 1:250,000-scale CI
Quadrangle map, 1:63,360-scale B-2
Latitude 65.408
Longitude -144.875
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location is roughly the center of a productive placer area of approximately 80 square miles. It includes the following main drainages: Deadwood Creek, Ketchem Creek and Bottom Dollar Creek.

Geologic setting

Geologic description

The creeks around Ketchem Dome drain a variety of rock types. To the north and northeast of Ketchem Dome, Ketchem and Holdem Creeks drain an area underlain by Tertiary granite. To the south, the Bottom Dollar Creek drainage is underlain by both Cretaceous granite and quartz-muscovite schist - the Lower Schist unit described by Wiltse and others (1995). Deadwood Creek drainage to the northwest is underlain both by Tertiary granite and the quartz-muscovite Lower Schist.
Gold is found in the gravel close to bedrock and in cracks in the bedrock. Placer gold has been mined on several creeks within this area that have been described separately (see Workings and Exploration).
Geologic map unit (-144.87743949273, 65.4076343444679)
Mineral deposit model Placer gold deposit (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a

Production and reserves

Workings or exploration See Ketchem Creek, ARDF no. CI031, Bottom Dollar Creek, ARDF no. CI007 and Deadwood Creek, ARDF no. CI014 for site-specific workings and exploration.
Indication of production Yes; small
Production notes See Ketchem Creek, ARDF no. CI031, Bottom Dollar Creek, ARDF no. CI007 and Deadwood Creek, ARDF no. CI014 for specific site-production notes.

Additional comments

See also Ketchem Creek, ARDF no. CI031, Bottom Dollar Creek, ARDF no. CI007 and Deadwood Creek, ARDF no. CI014.

References