Mastodon Dome Area (includes Mammoth Creek, Miller Creek, Eagle Creek, and Mastodon Creek)

Mines, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Sb; Sn; W
Ore minerals cassiterite; gold; silver

Geographic location

Quadrangle map, 1:250,000-scale CI
Quadrangle map, 1:63,360-scale B-3
Latitude 65.417
Longitude -145.339
Nearby scientific data Find additional scientific data near this location
Location and accuracy Sites comprise productive placer area of approximately 120 sq. mi. including Mammoth Creek and its tributaries and the northeastern tributaries of Twelve Mile Creek. For specific site information see the following: Mammoth Creek, ARDF no. CI036, Miller Creek, ARDF no. CI039, Eagle Creek, ARDF no. CI017 and Mastodon Creek, ARDF no. CI037.

Geologic setting

Geologic description

Bedrock in the Mastodon Dome area is varied. Eagle Creek drainage to the west of Mastodon Dome is underlain by both the Upper Quartzite and Upper Schist units described by Wiltse and others (1995). Mastodon Creek is underlain by the Middle Schist and Quartzite unit.
Streams in this area have 5 to 10 feet of gravel under a few feet of muck. Gold is in the bottom few feet of gravel and in cracks in bedrock. Fineness of gold varied from 0.787-0.838 Au and 0.153-0.201 Ag.
Geologic map unit (-145.341449480691, 65.4166247358114)
Mineral deposit model Placer gold deposit (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a

Production and reserves

Workings or exploration See individual creeks for specific workings and exploration information: Mammoth Creek, ARDF no. CI036, Miller Creek, ARDF no. CI039, Eagle Creek, ARDF no. CI017 and Mastodon Creek, ARDF no. CI037.
Indication of production Yes; medium
Production notes See individual creeks for specific production notes: Mammoth Creek, ARDF no. CI036, Miller Creek, ARDF no. CI039, Eagle Creek, ARDF no. CI017 and Mastodon Creek, ARDF no. CI037.

Additional comments

See also Mastodon Creek, ARDF no. CI037, Eagle Creek, ARDF no. CI017, Miller Creek, ARDF no. CI039 and Mammoth Creek, ARDF no. CI036.

References