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  3. Mineral Resource Data System (MRDS)

Fortymile R., North Fork Placer

Past Producer in Alaska, United States with commodities Gold, Tin
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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 10002707
MRDS ID A015149
Record type Site
Current site name Fortymile R., North Fork Placer
Related records 10257544

Geographic coordinates

Geographic coordinates: -142.02994, 64.38532 (WGS84)
Location accuracy 250(meters)
Relative position ABOUT 22 MILES NORTH OF CHICKEN

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Eagle B-3(quadrangle 1:63,360 scale)

Eagle SW(quadrangle 1:100,000 scale)

Eagle C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Fortymile River WSR(Wild and Scenic River)

Wild and Scenic River BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-393, LOC. 46. DEPOSIT IN ARTIFICIALLY CUT OFF MEANDER BAR MARKED "THE KINK" ON EAGLE (B-3), ADJACENT TO NORTH FK. FORTYMILE RIVER. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Tin Critical Tertiary

Materials information

Materials Type of material
Cassiterite Ore
Gold Ore
Biotite Gangue
Garnet Gangue

Nearby scientific data

(1) -142.02994, 64.38532
ListMap

Economic information

Comments on the geologic information

  • MAJOR.UNITS: BEDROCK IS QUARTZ BIOTITE GARNET SCHIST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1903
Year of last production 1934

Mining district

District name Fortymile

Land status

Ownership category State

Comments on development

  • MEANDER WAS CUT OFF IN 1903 WITH INTENTION OF MINING THE DRAINED MEANDER. DREDGE MOVED TO "THE KINK" IN 1912, BUT NEVER OPERATED SUCCESSFULLY, STILL THERE IN 1936. BAR MINING 1933-34.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit GOLD AND PLACER CASSITERITE IN BAR GRAVEL IN ARTIFICIALLY CUT OFF MEANDER ENTRENCHMENT
Deposit STREAM GRADIENT UNDER 50 FT. PER MILE. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1987 Powers, M.T. (Huber, D.F.) 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.