Iron Creek

The Iron Creek is a iron and manganese 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: Iron Creek

Commodity

Primary: Iron
Primary: Manganese
Secondary: Titanium

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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Role: Host
Age Type: Host Rock
Age Young: Campanian
Age Old: Barremian

Analytical Data

Not available

Materials

Ore: Limonite
Ore: Pyrolusite
Ore: Rutile
Gangue: Calcite
Gangue: Dolomite

Comments

Comment (Geology): Age = Post mid-Cretaceous, the age of metamorphism of the host schist and marble.

Comment (Reserve-Resource): Reserves = Shallit (1942; Mulligan and Hess, 1965, table 3) estimated that there are 12,000 long tons of limonitic material containing 20 to 40 percent iron and 20,000 long tons of limonitic material containing 10 to 20 percent iron.

Comment (Geology): Geologic Description = Limonitic rocks occur in a synform near the base of a marble unit (Herreid, 1970, figure 1). According to Mulligan and Hess (1965), samples of outcrop consist of finely crystalline marble with minor disseminated limonite and limonitic cavity fillings; sericitic schist with minor earthy and compacted limonite and accessory rutile is also present. Associated schist consists of chlorite, limonite, quartz, biotite, sericite, manganese oxides (pyrolusite?), and minor clay. There is an estimated resource of 12,000 long tons of material that contains 20 to 40 percent iron and 20,000 long tons of 10 to 20 percent iron (Shallit, 1942; Mulligan and Hess, 1965, table 3). Mulligan and Hess (1965) found no evidence of sulfides at this deposit, and samples collected by Herreid (1970) contained only as much as 220 ppm zinc.

Comment (Workings): Workings / Exploration = Some surface prospecting pits are probably present.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Mulligan and Hess, 1965

Comment (Deposit): Model Name = Iron oxide veins and replacement of marble and schist.

Comment (Geology): Age = Host rock is Pre Campanian - Post Barremian.

References

Reference (Deposit): Herreid, G.H., 1970, Geology and geochemistry of the Sinuk area, Seward Peninsula, Alaska: Alaska Division of Mines and Minerals Geologic Report 36, 61 p., 3 sheets, scale 1:42,000.

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): Mulligan, J.J., and Hess, H.D., 1965, Examination of the Sinuk iron deposits, Seward Peninsula, Alaska: U.S. Bureau of Mines Open-File Report 8-65, 34 p.

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.

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