Foggy Day Prospect

The Foggy Day Prospect is a uranium 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

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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: Foggy Day Prospect

Commodity

Primary: Uranium
Tertiary: Tin
Tertiary: Tungsten
Tertiary: Copper

Location

State: Alaska

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1951
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

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 77.000000+-3.000000
Dating Method: K-Ar
Material Analyzed: Biotite

Analytical Data

Analytical Data: AVERAGE OF LENS PLUS ADJACENT GRANITE: 0.07% EU, USGS CIRCULAR 214, P. 6.
Analytical Data: LENS CONTAINED MAX. OF 2.1% EU, AVG. 0.1-0.2% EU OVER WHOLE BODY

Materials

Ore: Cassiterite
Ore: Scheelite
Ore: Chalcopyrite
Ore: Tetrahedrite
Gangue: Limonite
Gangue: Hematite
Gangue: Siderite
Gangue: Malachite

Comments

Comment (Location): USGS CIRCULAR 214, PLATE 1, PROSPECT 3; USGS BULLETIN 1129, PLATE 1, "BROOKS MT. URANIUM PROSPECT." LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Deposit): 4.3 M BY 1.2 M LENTICULAR PEGMATITE BODY CONTAINED ZEUNERITE IN TABULAR CRYSTALS UP TO 1/4 IN IN DIAMETER EMBEDDED IN HEMATITE-LINED RUGS; MINOR AMOUNTS OF PYRRHOTITE, ARSENOPYRITE, FLUORITE, SCHEELITE, CHALCOPYRITE, TERTRAHEDRITE, CASSITERITE, BISMUTH, AND ZEUNERITE DISSEMINATED IN ADJACENT OXIDIZED GRANITE.

Comment (Workings): 20 FT DEEP OPEN CUT; ENTIRE LENS REMOVED, 1951.

Comment (Geology): BROOKS MT PLUTON; PORPHYRITIC-SERIATE BIOTITE GRANITE, CUT BY PEGMATITE.

References

Reference (Other Database): BAG-MF-426-11

Reference (Deposit): USGS CIRCULAR 214, P. 3-6.

Reference (Deposit): USGS OFR 75-217, P. 19.

Reference (Deposit): USGS OFR 77-796-B, P. 6, LOC. 39.

Reference (Deposit): USGS OFR 78-1-C, P. 14.

Reference (Deposit): GSA BULLETIN, V. 94, NO. 6, P. 769-771.

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