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Ikoygak Creek

Occurrence in Alaska, United States with commodity Chromium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10003562
MRDS ID A106320
Record type Site
Current site name Ikoygak Creek

Geographic coordinates

Geographic coordinates: -171.66322, 63.67912 (WGS84)
Relative position Ikoygak Creek flows north into Akeftapak Bay on the northwest coast of St. Lawrence Island. The mouth of this creek is 7 1/2 miles southeast of Gambell and almost 6 miles northwest of Naskok Camp. This site was not included by Cobb (1972; 1980).

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Saint Lawrence D-6(quadrangle 1:63,360 scale)

Saint Lawrence NW(quadrangle 1:100,000 scale)

Saint Lawrence(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Lawrence Island(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

(1) -171.66322, 63.67912
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Three stream sediment samples on the lower part of this drainage contain 5,000 ppm chromium (Patton and Csejtey, 1972). This is an area of Quaternary surficial deposits and the concentration of chromium here could be in part related to alluvial or marine processes. Patton and Csejtey (1980) suggest that these high chromium values could indicate the presence of ultamafic rocks within a Triassic to Permian age mafic assemblage that is exposed at the surface 8 miles southeast of Ikoygak Creek. Patton and Csejtey (1980) also indicate that offshore dredge data support this interpretation but the source of this information (or the nature of the dredge data) is not indicated.
  • Age = If chromite deposits are present, they are probably related to intrusive rocks within the Triassic to Permian age mafic assemblage as suggested by Patton and Csejtey (1980).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bering Sea

Comments on the workings information

  • Workings / Exploration = None

Reference information

Bibliographic references

  • Deposit

    Patton, W.W., Jr., and Csejtey, Bela, Jr., 1972, Analyses of stream sediment and rock samples from St. Lawrence Island, Alaska, 1966-1971: U.S. Geological Survey Open-File Report 72-293, 78 p.

  • Deposit

    Patton, W.W., Jr., and Csejtey, Bela, Jr., 1980, Geologic map of St. Lawrence Island, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1203, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Patton and Cjestey, 1972

General comments

Subject category Comment text
Deposit Model Name = Placer concentration of chromite.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-SEP-1998 Travis L. Hudson Applied Geology

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.