The Colbert Prospect is a tungsten 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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Colbert Prospect MRDS details
Site Name
Primary: Colbert Prospect
Commodity
Primary: Tungsten
Location
State: Alaska
District: Fairbanks
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: 1941
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: Scheelite
Comments
Comment (Deposit): GEOPHYSICAL EXPLORATION INDICATED "A CONTINUOUS VEIN STRUCTURE FOR OVER 3,000 FT." ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment (Location): USGS MF-410, LOC. 32. DEPOSIT STRIKES WSW-ENE ACCROSS THE SUMMIT OF GILMORE DOME. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Development): LOCATED, 1941. PROSPECTING 1941-42. IN 1943 THE USBM EXPLORED A 2,000 FT. SECTION OF MINERALIZED BELT BY EXCAVATING 20 BULLDOZER TRENCHES AND 35 HAND-DUG PITS. EXPLORED ALSO BY GEOPHYSICAL METHODS. PROPERTY COMPRISES 14 UNPATENTED CLAIMS.
Comment (Deposit): CALCAREOUS LAYERS (AND PROBABLY A LITTLE LIMESTONE) IN QUARTZ MICA SCHIST REPLACED BY SCHEELITE ORE. SCHEELITE ABUNDANT IN 3 ORE SHOOTS AND IN WIDELY SPACED SMALL (LESS THAN 1 FT.) POCKETS; SCATTERED GRAINS ALSO. SCHEELITE MINERALIZATION GENERALLY PARALLELS SCHISTOSITY; SMALL AMOUNTS OF SCHEELITE IN GRANITE. LODE TRACED (BY TRENCHING) FOR 2,000 FT. ON SURFACE; PINCHED OUT IN SOME PLACES; 50 FT. WIDE IN ONE TRENCH. SCHEELITE LENSES ARE .5 TO 1.2 FT. THICK AND FROM A FEW TO 100 FT. LONG. QUARTZ VEINLETS AND THIN FRACTURES THAT CARRY SCHEELITE ARE IN ORE ZONE, COMMONLY PARALLEL TO MAIN REPLACEMENT ZONE.
Comment (Geology): QUARTZ-MICA SCHIST COUNTRY ROCK STRIKES N 70 E AND DIPS 35 N. LODE .4 MI N OF MAIN MASS OF PORPHYRITIC GRANITE AND .8 MI. S OF AN OUTLYING CUPOLA.
References
Reference (Deposit): USGS MF-410 (D-1), LOC. 32
Reference (Deposit): USGS BULL 1024-I, P. 189, 199-200
Reference (Deposit): USBM RI 4174, P. 4, 6, 8-11.
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