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Stebbins

Prospect in Alaska, United States with commodity Iron
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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. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308990
MRDS ID A012395
Record type Site
Current site name Stebbins
Alternate or previous names Unnamed (on Percy and Cow Islands)
Related records 10094043

Geographic coordinates

Geographic coordinates: -131.59375, 54.95074 (WGS84)
Relative position This site represents the locations of three prospects for iron minerals in ultramafic rocks on the the Percy Islands (Sec 8, T. 80 S., R. 92 E., of the Copper River Meridian), Cow Island (Sec 5, T. 80 S., R. 92 E., of the Copper River Meridian), and an adjacent island (Stebbins, Sec 7, T. 80 S., R. 92 E.) for which there either are U.S. Bureau of Mines (1974) claim records, or other published descriptions (Taylor and Noble, 1960; Elliott and others, 1978, locs. 156-158; Cobb and Elliott, 1980, p. 141). The coordinates are for the approximate center of the estimated 6-square-mile outcrop area of the ultramafic rocks and are accurate within about 0.1 mile.

Site location context

Political divisions (FIPS codes)

Prince of Wales-Hyder(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Prince Rupert D-5(quadrangle 1:63,360 scale)

Duke Island(quadrangle 1:100,000 scale)

Prince Rupert(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ketchikan(hydrologic unit)

Southern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Titaniferous Magnetitite Ore

Mineral occurrence model information

Model code 23
USGS model code 9
Deposit model name Alaskan Cr-Pt (PGE)
Mark3 model number 120

Nearby scientific data

(1) -131.59375, 54.95074
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Percy Islands, Cow Island, and adjacent islands (Taylor and Noble, 1960, p. 181; Berg and others, 1988) are underlain by metamorphosed undivided Silurian or Ordovician intermediate and mafic intrusive rocks, and by a Cretaceous ultramafic complex, which intrudes the metamorphic rocks. The ultramafic complex consists of olivine pyroxenite with a border zone of hornblende pyroxenite, which in turn is surrounded by gabbro. The hornblende pyroxenite contains titaniferous magnetite, whose abundance and distribution probably is similar to that on Duke Island (ARDF PR001). A prospect on the Percy Islands has been drilled by private interests, but no data on potential iron resources have been made public.
  • Age = Cretaceous

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Ketchikan

Comments on the workings information

  • Workings / Exploration = A prospect on the Percy Islands has been drilled by private interests, but no data on potential iron resources have been made public.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = U. S. Bureau of Mines, 1974; Cobb and Elliott, 1980

General comments

Subject category Comment text
Deposit Model Name = Alaska PGE (Cox and Singer, 1986; model 9)

Reporter information

Type Date Name Affiliation Comment
Reporter 02-FEB-1999 H.C. Berg 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.