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Colbert

Past Producer in Alaska, United States with commodities Antimony, Molybdenum, Tin, Tungsten
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10232891
MRDS ID A015302
MAS/MILS ID 0020580032
Record type Site
Current site name Colbert
Alternate or previous names Cleary Hill, Stepovich, Alaska Metals Mng Co, Polaris, Venus, Aurora, Orion, Titanic, Scheelite, Scheelite No. 2, Slay, Caucasian, Lucky, Chippewan, Scheelite No. 3, Big Chief, Big Chief 2-6, Naida, Hillside, September 1st, September 2nd, Joint Fraction, Spruce, Smallwood, Pearl, Triangle, Marie, Stohl, Neimi, Christenson, Melba, Garnet
Related records 10002830

Geographic coordinates

Point of reference Claim
Geographic coordinates: -147.36515, 64.98078 (WGS84)
Elevation 694
Location accuracy 500(meters)

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

Public Land Survey System information

Meridian Township Range Section Fraction State
Fairbanks 002 N 002 E 21 E2SWSW Alaska

Commodities

Commodity Importance
Antimony Critical Primary
Molybdenum Primary
Tin Critical Primary
Tungsten Critical Primary

Materials information

Materials Type of material
Apatite Unknown
Calcite Unknown
Cassiterite Unknown
Diopside Unknown
Garnet Unknown
Gold Unknown
Hornblende Unknown
Molybdenite Unknown
Pyrite Unknown
Pyrolusite Unknown
Pyrrhotite Unknown
Quartz Unknown
Scheelite Unknown
Stibnite Unknown

Nearby scientific data

Claim (1) -147.36515, 64.98078
ListMap

Economic information

Ore body information

  • Strike N50E
    Dip 32N
    Thickness 95M
    Length 610M
    Width 13M
    Area 100HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 IRREGULAR
    Primary mode of Origin RESIDUAL CONCENT
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control CONTACT ZONE
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. MODERATE
    Strike And Dip N50E:32N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 100
    Date of Last Modification 860825

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1915
Year of first production 1918

Mining district

District name Fairbanks District

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented
Type of mineral rights Private Lease

Land status

Ownership category Mixed

Ownership information

  • Type Owner-Operator
    Owner Alaska Metals Mining Co.
    Interest 70
    Home office Alaska
    Year 1975
  • Type Owner-Operator
    Owner Mike Stepovich Estate
    Interest 30
    Home office Alaska
    Year 1975

Production statistics

  • Year 1918
    Description Concentrate Contained 65% Wo3 10 Metric Tons Concentrate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Tungsten Tungsten 10mt
  • Year 1942
    Description Ore Averaged 4.55% W03 60 Metric Tons Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tungsten Tungsten 60mt
  • Year 1944
    Description Ore Concentrated To 38.3 @ 49.7% Wo3 800 Metric Tons Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tungsten Tungsten 800mt 50wt-pct

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Indicated 8100mt ore
    Demonstrated 8100mt ore
    Inferred 11200mt ore
    Total resources 19300mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 3.6 wt-pct Tungsten Major 1945
  • Type In-situ
    Estimate year 1945
    Indicated 1360mt ore
    Demonstrated 1360mt ore
    Total resources 1360mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 1.6 wt-pct Tungsten Major 1945

Comments on the reserve resource information

  • RC1=M1C1. Q-P50, Q-P25, Q-P10 IS SUM OF INDICATED & INFERRED RESERVES

Workings at the site

  • Type of workings Underground
    Length 204M
    Overall depth 0M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OVERHAND SQUARE-SET 10-46A
    Swell Factor .57
    Percent Waste Rock 10
    Percent Recovery 75
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING MAY SLOUGH
    Mine Support Chars. TIMBER
    Length of Inclines (m) 0
    Slope of Inclines 0
    Avg. Length of Adits (m) 240
    Number of Adits 1
    1st Condition of Workings UNKNOWN
    Capacity 19
    Capacity Units MT ORE/DAY
    Unit Production Cost 31.44
    Units of Production $/MT ORE
    Operating Days per Year 200
    Operating Shifts per Day 1
    Year of Information 1976

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit USGS CRIB A001766 USGS CRIB A001180 USGS CRIB D002662 USGS CRIB D002669

Reporter information

Type Date Name Affiliation Comment
Reporter 12-FEB-1988 Mirl-Rdc U.S. Bureau of Mines

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.