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  3. Mineral Resource Data System (MRDS)

Halibut Bay 46

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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001690
MRDS ID A012469
Record type Site
Current site name Halibut Bay 46

Geographic coordinates

Geographic coordinates: -154.58746, 57.35326 (WGS84)
Relative position This site is located 4.6 miles north of Anvil Mountain in sec. 33, T. 32 S., R 33 W., of the Seward Meridian (Foley and Barker, 1985, figure 25, locality 46; Foley and others, 1989, locality 32). Site location is accurate to within several hundred feet.

Site location context

Political divisions (FIPS codes)

Kodiak Island(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Karluk B-2(quadrangle 1:63,360 scale)

Karluk S(quadrangle 1:100,000 scale)

Karluk(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Kodiak-Afognak Islands(hydrologic unit)

Kodiak-Shelikof(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Kodiak National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Alteration

  • (Local) The ultramafic country rock is serpentinized?

Mineral occurrence model information

Model code 16
USGS model code 8b
Deposit model name Podiform chromite (major)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Halibut Bay Complex
    Rock description Halibut Bay Complex
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite > Clinopyroxenite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -154.58746, 57.35326
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This chromite occurrence, one of several within the Halibut Bay ultramafic complex, consists of segregations and disseminations of magnetic chromite within a 35-foot thick dunite layer which is bounded by clinopyroxenite. The dunite layer strikes N. 10 W. and has an inferred strike length of 750 feet and an inferred dip length of 187 feet. Foley and Barker (1985, table 13) estimate that the layer contains 43,000 tons of rock grading 7 percent chromite. A bulk sample of the mineralized dunite had a head grade of 7.7 percent chromite and a gravity concentrate grade of 34.6 percent. The concentrate had a chrome:iron ratio of 1.1 and contained traces of gold, silver, platinum, and palladium (Dahlin and others, 1985, table A-28). No estimates of recoverable chromite were made because of the inferior quality of the concentrate.? The Halibut Bay ultramafic complex, consisting mostly of dunite, gabbro, pyroxenite, and peridotite, occurs within sedimentary units of the Uyak formation of Cretaceous age

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Kodiak

Comments on the reserve resource information

  • Reserves = This deposit is estimated to contain 43,000 tons grading 7 percent chromite. Concentrates of the chromite indicate inferior quality.

Comments on the workings information

  • Workings / Exploration = This deposit is estimated to contain 43,000 tons of rock grading 7 percent chromite (Foley and Barker, 1985, table 13). A bulk sample had a head grade of 7.7 percent chromite and a gravity concentrate grade of 34.6 percent chromite. The chrome:iron ratio of the concentrate was 1.1 and contained traces of gold, silver, platinum, and palladium (Dahlin and others, 1985, table A-28).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Foley and Barker, 1985

General comments

Subject category Comment text
Deposit Model Name = Podiform chromite (Cox and Singer, 1986; model 8b).
Deposit Other Comments = Site is located within Kodiak National Wildlife Refuge.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1998 S.H. Pilcher U.S. Geological Survey

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.