1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Colbert Prospect

Occurrence in Alaska, United States with commodity Tungsten
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10002830
MRDS ID A015302
Record type Site
Current site name Colbert Prospect
Related records 10232891

Geographic coordinates

Geographic coordinates: -147.36406, 64.98079 (WGS84)
Relative position 14 MILES NE OF FAIRBANKS

Site location context

Political divisions (FIPS codes)

Fairbanks North Star(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fairbanks D-1(quadrangle 1:63,360 scale)

Big Delta NW(quadrangle 1:100,000 scale)

Fairbanks(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • 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).

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Mica Schist

Nearby scientific data

(1) -147.36406, 64.98079
ListMap

Economic information

Comments on the geologic information

  • 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.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1941
Discoverer L.D. Colbert

Mining district

District name Fairbanks

Comments on 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.

Reference information

Bibliographic references

General comments

Subject category Comment text
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.
Deposit GEOPHYSICAL EXPLORATION INDICATED "A CONTINUOUS VEIN STRUCTURE FOR OVER 3,000 FT." ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey
Editor 20-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.