Iron Creek (lower)

Occurrence in Alaska, United States with commodities Iron, Lead

Geologic information

Identification information

Deposit ID 10307964
Record type Site
Current site name Iron Creek (lower)

Geographic coordinates

Geographic coordinates: -165.73179, 64.72208 (WGS84)
Relative position Iron Creek is an informally named, small west tributary to Cripple River that is not shown on the current U.S. Geological Survey topographic map. This occurrence is 2 miles northeast of the Nome-Teller road. The occurrence, called the Lower Iron Creek gossan by Herreid (1970, figure 1), is about a half mile west of the mouth of Gold Run, another tributary to the Cripple River. The occurrence is at about 500 to 600 feet elevation and located to within about 500 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Lead Secondary

Materials information

Materials Type of material
Hematite Ore
Limonite Ore

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Santonian

Nearby scientific data

(1) -165.73179, 64.72208

Comments on the geologic information

  • Geologic Description = The Lower Iron Creek gossan was located by Herreid (1970, figure 1) and shown to be about 600 feet long in a north-northwest direction. It is in massive marble, probably the same as the massive marble unit of Bundtzen and others (1994). This occurrence is probably similar to other iron oxide deposts in the area such as the Cub Bear prospect (NM133) and Iron Creek prospect (NM131). Herreid (1970) noted anomalous lead at this prospect, but it is not reflected in the one sample for which an analysis was reported from the occurrence (sample 146, Herried, 1970). The origin of the iron deposits in the area is uncertain. They may be iron oxide gossan developed by the oxidation of sulfide deposits (Eakin, 1915 [B 622-I, p. 361-365]; Mulligan and Hess, 1965; Herreid, 1970). Alternatively, they could be hypogene iron oxide (and iron carbonate) deposits. Inasmuch as several similar iron deposits nearby, such as the American prospect (NM014) and the Monarch prospect (NM017), contain anomalous amounts of zinc, they could be transitional to zinc-lead-fluorite deposits such as the Quarry prospect (NM135).
  • Age = Post mid-Cretaceous, the age of metamorphism of the host carbonate rocks.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = Surface exposure only; workings have not been discribed at this locality although it was probably prospected before 1915, as were other iron oxide prospects in the area.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF NM134

Bibliographic references

  • Deposit

    Eakin, H.M., 1915, Placer mining in Seward Peninsula: U.S. Geological Survey Bulletin 622-I, p. 366-373.

  • 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

    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.

Comments on the references

  • Primary Reference = Herreid, 1970

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. and Hudson, Travis L. Hawley Resource Group