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

Past Producer in Alaska, United States with commodities Gold, Silver, Antimony, Tin, Tungsten

Geologic information

Identification information

Deposit ID 10100944
MRDS ID A010699
Record type Site
Current site name Mastodon Dome Area (includes Mammoth Creek, Miller Creek, Eagle Creek, and Mastodon Creek)

Geographic coordinates

Geographic coordinates: -145.34182, 65.41667 (WGS84)
Relative position 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.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Antimony Secondary
Tin Secondary
Tungsten Secondary

Materials information

Materials Type of material
Cassiterite Ore
Gold Ore
Silver Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
BC deposit profile C01. C02
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -145.34182, 65.41667

Comments on the geologic information

  • 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.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Circle

Comments on the production information

  • 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.

Comments on the workings information

  • Workings / 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.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010699
USGS Alaska Resource Data File ARDF CI038

Bibliographic references

  • Deposit

    Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-633, 72 p.

  • Deposit

    Yeend, W.E., 1991, Gold placers of the Circle district, Alaska - past, present, and future: U.S. Geological Survey Bulletin 1943, 42 p.

Comments on the references

  • Primary Reference = Yeend, 1991.

General comments

Subject category Comment text
Deposit Model Name = Placer gold deposit (Cox and Singer, 1986; model 39a)
Deposit Other Comments = See also Mastodon Creek, ARDF no. CI037, Eagle Creek, ARDF no. CI017, Miller Creek, ARDF no. CI039 and Mammoth Creek, ARDF no. CI036.

Reporter information

Type Date Name Affiliation Comment
Reporter 09-SEP-98 C.J. Freeman Avalon Development Corporation
Reporter 09-SEP-98 J.R. Guidetti Schaefer Avalon Development Corporation
Reporter 09-SEP-98 Clements, A.S. Avalon Development Corporation