Rainbow Gulch

Occurrence in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10308538
Record type Site
Current site name Rainbow Gulch
Alternate or previous names Rainbow Creek

Geographic coordinates

Geographic coordinates: -149.95333, 67.4697 (WGS84)
Relative position Rainbow Gulch is a north- and west-flowing tributary to the Middle Fork Koyukuk River and is located 2 to 3 miles northwest of Minnie Creek Lake. Reed (1938) described Rainbow Creek as running a little north of west, which would coincide with the lower part of the creek. The reference point for the prospects on this creek thus has been plotted near a cabin shown on the topographic map on the lower part of the creek (sec. 35, T. 31 N., R. 11 W., of the Fairbanks Meridian). The location is accurate within a 1-mile radius.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
BC deposit profile C01. C02
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -149.95333, 67.4697

Comments on the geologic information

  • Geologic Description = Reed (1938, p. 30) reported that the creek had good prospects and speculated that the creek would be a producer, given improved freight rates to the area. Mapping shows the creek to drain an area underlain predominantly by Devonian siltstone and grit (Brosgi and Reiser, 1964). No other information is available
  • Age = Quaternary.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chandalar

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF CH031

Bibliographic references

  • Deposit

    Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.

  • Deposit

    DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.

  • Deposit

    Reed, I.M., 1938, Upper Koyukuk region, Alaska (Wiseman, Chandalar, and Bettles): Alaska Territorial Department of Mines Miscellaneous Report 194-7, 201 p

Comments on the references

  • Primary Reference = Reed, 1938

General comments

Subject category Comment text
Deposit Model Name = Placer Au (Cox and Singer, 1986; model 39a)

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1999 J.M. Britton U.S. Geological Survey