Extra Dry Creek

The Extra Dry Creek is a gold mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Extra Dry Creek

Commodity

Primary: Gold

Location

State: Alaska
District: Nome

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Placer Au-PGE

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold
Gangue: Quartz

Comments

Comment (Geology): Age = Quaternary.

Comment (Exploration): Status = Inactive

Comment (Production): Production Notes = About 1,000 ounces of gold were recovered from this creek between 1900 and 1903 (Collier and others, 1908; Moffit, 1913). Lower grade deposits may have been mined on the lower creek in later years, but records of ny such production are not available.

Comment (Workings): Workings / Exploration = Extra Dry Creek was worked by shovel-in or rocker methods from 1900 until about 1905. Moffit (1913) thought that the creek was worked out by about 1905 or 1906. Tailings along the creek down to the Nome River road and suggest that the lower part of the creek was worked mechanically in later years.

Comment (Deposit): Model Name = Alluvial placer Au (Cox and Singer, 1986; model 39a).

Comment (Reference): Primary Reference = Collier and others, 1908

Comment (Geology): Geologic Description = The alluvial gold placer deposit in the upper canyon of Extra Dry Creek was worked by hand and produced about 1,000 ounces of gold between 1900 and 1903 (Brooks and others, 1901; Collier and others, 1908). The unconsolidated deposits about one-half mile below the head of the creek included, top to bottom, 1 foot of muck, 1 foot of sandy clay, and 6 feet of schist and quartz gravel on bedrock; pay was in the lower 2 feet of gravel. Some coarse gold was recovered; the largest nugget found in 1900 was about 0.6 ounce (Brooks and others, 1901; Moffit, 1913). Bedrock has been mapped as mica schist containing marble interlayers (Brooks and others, 1901; Moffit, 1913), mainly metagranodiorite (Hummel, 1962 [MF 247]), and mainly porphyroclastic micaceous graphitic schist and graphitic quartz schist (Bundtzen and others, 1994). The gold possibly had a local bedrock source; it apparently becomes finer grained downstream. Some of the gold had attached quartz (Collier and others, 1908, p. 176).

References

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.

Reference (Deposit): Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.

Reference (Deposit): Brooks, A.H., Richardson, G. B., and Collier, A. J., 1901, Reconnaissance in the Cape Nome and Norton Bay regions, Alaska, in 1900: U.S. Geological Survey Special Publication, p. 1-180.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.

Reference (Deposit): Moffit, F.H., 1913, Geology of the Nome and Grand Central quadrangles, Alaska: U.S. Geological Survey Bulletin 533, 140 p.

Reference (Deposit): Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.

Reference (Deposit): Collier, A. J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.

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