Fortymile R., North Fork Placer

Past Producer in Alaska, United States with commodities Gold, Tin

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
(click for info)

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 Tertiary

Materials information

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

Nearby scientific data

(1) -142.02994, 64.38532

Comments on the geologic information

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

Economic information

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

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015149

Bibliographic references

  • Deposit

    USGS MF-393 (B-3), LOC. 46.

  • Deposit

    USGS BULL 251, P. 51-52.

  • Deposit

    USGS BULL 872, P. 245.

  • Other Database

    BAG-MF-393-46

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