1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Fortymile River Area

Past Producer 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. Materials information
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Land status
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10000550
MRDS ID A010756
Record type Site
Current site name Fortymile River Area

Geographic coordinates

Geographic coordinates: -141.24679, 60.39135 (WGS84)

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bering Glacier B-1(quadrangle 1:63,360 scale)

Bering Glacier SE(quadrangle 1:100,000 scale)

Bering Glacier(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chitina River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

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

Comments on the location information

  • A PRODUCTIVE PLACER AREA OF APPROXIMATELY 40 SQ MI. ALONG THE FORTYMILE RIVER LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).; PREVIOUS QUAD DESIGNATION = BERING GLACIER 1:250000

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Nearby scientific data

(1) -141.24679, 60.39135
ListMap

Economic information

Comments on the geologic information

  • MAJOR.UNITS: SCHIST, SLATE, AND LIMESTONE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1886
Year of last production 1965

Mining district

District name Fortymile District

Land status

Ownership category National Park

Comments on the production information

  • PRODUCTION WAS WELL OVER 100,000 TOZ AU

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MOST PRODUCTION FROM EXPOSED BEDROCK IN STREAM, WHICH HAS A CLEAVAGE THAT CUTS ACROSS STREAM AND TRAPS GOLD DURING EACH FLOOD. BENCHES NOT EXTENSIVELY EXPLORED, BUT SHOW POTENTIAL

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1984 Hirschmann, M. M. (Elliott, R. L.) 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.