Unnamed (north of Noatak River)

The Unnamed (north of Noatak River) is a copper, tin, and lead 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed (north of Noatak River)

Commodity

Primary: Copper
Primary: Tin
Primary: Lead
Secondary: Zinc
Secondary: Antimony
Secondary: Bismuth
Secondary: Beryllium
Secondary: Gold
Secondary: Arsenic
Secondary: Silver

Location

State: Alaska
District: Noatak

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Sn skarn

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Quartz and calc-silicate minerals.

Rocks

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Late Devonian

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Devonian

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Late Devonian

Analytical Data

Not available

Materials

Ore: Pyrrhotite
Ore: Sphalerite
Ore: Chalcopyrite
Ore: Galena
Gangue: Quartz

Comments

Comment (Geology): Geologic Description = The occurrences at the site are contact-metamorphic deposits in Paleozoic phyllite and limestone over a dome of Devonian gneissic granite that is exposed on the north bank of the Noatak River. Three small mineral occurrences have been documented (Grybeck and Nelson, 1981). They include quartz vein rubble and skarn containing various combinations of ore minerals including galena, chalcopyrite, pyrrhotite, and sphalerite. Select samples contain up to 480 ppm Ag, 3.5 ppm Au, 5,000 ppm As, 150 ppm Be, 150 ppm Bi, and 100 ppm Sn. The occurrences are similar to those at SP009, and to other contact metamorphic deposits elsewhere in the Brooks Range (Newberry and others, 1986).

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Related to the intrusion of the Devonian pluton.

Comment (Workings): Workings / Exploration = Samples were mostly collected during spot stops and short traverses during geologic mapping by the USGS in the late 1970s.

Comment (Commodity): Gangue = Calc-silicate minerals

Comment (Deposit): Model Name = Skarn (Cox and Singer, 1986; model 14b)

Comment (Deposit): Other Comments = Located within Gates of the Arctic National Park.

Comment (Reference): Primary Reference = Grybeck and Nelson, 1981

References

Reference (Deposit): Garland, R.E., Eakins, G.R., Trible, T.C., 1975, Geochemical analysis of rock and stream-sediment samples from Survey Pass C-5 quadrangle: Alaska Division of Geological and Geophysical Surveys Open-File Report 64, 4 p, 2 sheets, scale 1:63,360.

Reference (Deposit): Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000.

Reference (Deposit): Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752

The Top Ten Gold Producing States

These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.