Colbert Prospect

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

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: 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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