Little Joe Prospect

The Little Joe Prospect is a thorium and uranium mine located in Alaska at an elevation of 1,201 feet.

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: Little Joe Prospect

Commodity

Primary: Thorium
Primary: Uranium

Location

State: Alaska
District: Ketchikan District

Land Status

Land ownership: National Forest
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: Occurrence
Operation Type: Unknown
Discovery Year: 1956
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Large Vertical Fault N75w Cuts Across Both Prospect Sites.

Alterations

Not available

Rocks

Name: Peralkaline Granite
Role: Host
Age Type: Associated Rock
Age in Years: 181.000000+-
Dating Method: K-Ar
Age Young: Middle Jurassic

Name: Peralkaline Granite
Role: Host
Age Type: Associated Rock
Age in Years: 171.000000+-
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Middle Jurassic

Name: Peralkaline Granite
Role: Host
Age Type: Associated Rock
Age in Years: 186.000000+-
Dating Method: K-Ar
Age Young: Middle Jurassic

Name: Peralkaline Granite
Role: Associated
Age Type: Associated Rock
Age in Years: 186.000000+-
Dating Method: K-Ar
Age Young: Middle Jurassic

Name: Peralkaline Granite
Role: Associated
Age Type: Associated Rock
Age in Years: 181.000000+-
Dating Method: K-Ar
Age Young: Middle Jurassic

Name: Peralkaline Granite
Role: Associated
Age Type: Associated Rock
Age in Years: 171.000000+-
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Middle Jurassic

Analytical Data

Analytical Data: CHEMICAL ANALYSIS OF ONE REPRESENTATIVE SAMPLE: 0.095%

Materials

Gangue: Quartz
Gangue: Zircon
Gangue: Albite
Gangue: Riebeckite

Comments

Comment (Location): LITTLE JIM PROSPECT IS LOCATED 1500FT N59W FROM GIVEN LOCATION AT 1600 FT LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Commodity): ORE MINERALS ARE UNSPECIFIED U-TH MINERALS

Comment (Deposit): TWO SETS OF SUBPARALLEL DIKES RANGE IN THICKNESS FROM A FEW INCHES TO 2FT. MAXIMUM RADIOACTIVITY RECORDED WAS 0.9 MILLIROENTGENS PER HOUR.

Comment (Deposit): INCLUDES REFERENCES TO LUCKY JIM PROSPECT ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Deposit): USGS BULLETIN 1154, P.89-90

Reference (Deposit): CAN.J. EARTH SC1, VOL 20, NO2, P.236-245

Reference (Deposit): USGS OPEN FILE 78-863, P.6-8

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