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Iron Creek

Prospect in Alaska, United States with commodities Iron, Manganese, Titanium
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Geologic information

Identification information

Deposit ID 10094061
MRDS ID A012782
Record type Site
Current site name Iron Creek
Related records 10281774

Geographic coordinates

Geographic coordinates: -165.74386, 64.73539 (WGS84)
Relative position The Iron Creek prospect is on the ridge crest northeast of the head of Ashland Creek, 2.5 miles northeast of the Nome-Teller road. The prospect is at an elevation of about 1,100 feet and near the center of section 6, T. 9 S., R. 35 W., Kateel River Meridian. The location is accurate to within about 500 feet. This is locality 6 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Manganese Primary
Titanium Secondary

Materials information

Materials Type of material
Limonite Ore
Pyrolusite Ore
Rutile Ore
Calcite Gangue
Dolomite Gangue

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Campanian
    Stratigraphic age (oldest) Barremian
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble

Nearby scientific data

(1) -165.74386, 64.73539
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Comments on the geologic information

  • 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.
  • Age = Post mid-Cretaceous, the age of metamorphism of the host schist and marble.
  • Age = Host rock is Pre Campanian - Post Barremian.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the reserve resource information

  • 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.

Comments on the workings information

  • Workings / Exploration = Some surface prospecting pits are probably present.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012782
USGS Alaska Resource Data File ARDF NM131

Bibliographic references

  • 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.

  • 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.

  • 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.

  • 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.

Comments on the references

  • Primary Reference = Mulligan and Hess, 1965

General comments

Subject category Comment text
Deposit Model Name = Iron oxide veins and replacement of marble and schist.

Reporter information

Type Date Name Affiliation Comment
Reporter 12-MAR-00 Hawley, C.C. Hawley Resource Group
Reporter 12-MAR-00 Travis L. Hudson Hawley Resource Group