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  3. Mineral Resource Data System (MRDS)

Unnamed (Bremner River aboveThreemile Canyon)

Prospect in Alaska, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Mineral occurrence model 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 10307392
Record type Site
Current site name Unnamed (Bremner River aboveThreemile Canyon)

Geographic coordinates

Geographic coordinates: -144.15248, 60.99965 (WGS84)
Relative position This mile-long placer prospect is along the Bremner River just upstream from Threemile Canyon. The map site is at the midpoint of the placer, in SW1/4 sec. 15, T. 10 S., R. 7 E., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. The prospect is shown as #31 in Cobb (1972: MF-392).

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova D-1(quadrangle 1:63,360 scale)

Cordova NE(quadrangle 1:100,000 scale)

Cordova(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Copper River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chugach Alaska Corporation(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Wrangell-St. Elias National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) Kaf
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This prospect consists of small amounts of placer gold in alluvium derived from Upper Cretaceous Valdez Group metamorphic rocks (Winkler and Plafker (1981). According to Moffit (1914), high benches of glacial outwash behind a ridge of shale formerly dammed the river and formed a lake, producing a site of gold deposition. The gold is too fine and too sparse to have interested prospectors.
  • Age = Holocene.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the workings information

  • Workings / Exploration = Unknown.

Reference information

Bibliographic references

  • Deposit

    Winkler, G.R., and Plafker, George, 1981, Geologic map and cross sections of the Cordova and Middleton Island quadrangles, southern Alaska: U.S. Geological Survey Open-File Report 81-1164, 24 p., 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Cordova quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-392, 1 sheet, scale 1:250,000.

  • Deposit

    Moffit, F.H., 1914, Geology of the Hanagita-Bremner region, Alaska: U.S. Geological Survey Bulletin 576, 56 p.

Comments on the references

  • Primary Reference = Moffit, 1914

General comments

Subject category Comment text
Deposit Model Name = Placer Au (Cox and SInger, 1986; model 39a)
Deposit Other Comments = Located on lands within Wrangell-St. Elias National Park.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-00 S.W. Nelson 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.