Fortymile R., North Fork Placer

The Fortymile R., North Fork Placer is a gold mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Fortymile R., North Fork Placer

Commodity

Primary: Gold
Tertiary: Tin

Location

State: Alaska
District: Fortymile

Land Status

Land ownership: State
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1903
Year Last Production: 1934
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Cassiterite
Ore: Gold
Gangue: Biotite
Gangue: Garnet

Comments

Comment (Geology): MAJOR.UNITS: BEDROCK IS QUARTZ BIOTITE GARNET SCHIST.

Comment (Deposit): STREAM GRADIENT UNDER 50 FT. PER MILE. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Deposit): THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Comment (Deposit): GOLD AND PLACER CASSITERITE IN BAR GRAVEL IN ARTIFICIALLY CUT OFF MEANDER ENTRENCHMENT

Comment (Location): 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).

Comment (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.

References

Reference (Deposit): USGS BULL 872, P. 245.

Reference (Other Database): BAG-MF-393-46

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

Reference (Deposit): USGS BULL 251, P. 51-52.

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These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.