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Ajax Mine

Plant in Teller county in Colorado, United States with commodities Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10159458
MAS/MILS ID 0081190023
Record type Site
Current site name Ajax Mine

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.14387, 38.71611 (WGS84)
Elevation 3078
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Teller(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cripple Creek South(quadrangle 1:24,000 scale)

Pikes Peak(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Arkansas(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Geographic areas

Country State County
United States Colorado Teller

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Ankerite Unknown
Calaverite Unknown
Calcite Unknown
Chalcedony Unknown
Cinnabar Unknown
Dolomite Unknown
Fluorite Unknown
Galena Unknown
Krennerite Unknown
Petzite Unknown
Pyrite Unknown
Quartz Unknown
Roscoelite Unknown
Sylvanite Unknown
Tetrahedrite Unknown

Nearby scientific data

Main Entrance (1) -105.14387, 38.71611
ListMap

Economic information

Ore body information

  • Area 30HA
    Depth to top 1033M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Shape of Orebody #2 PIPELIKE
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 793
    Total Surface Area (HA) 30
    Date of Last Modification 970307

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1890
Mining method Combined Methods - Shrinkage W/Timbered Methods
Year of first production 1891
Plant type Leach
Milling method Flotation

Mining district

District name Cripple Creek District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Golden Cycle Gold Corp.
    Interest 33
    Home office Colorado
    Year 1994
    Last year 1994
  • Type Owner-Operator
    Owner Pikes Peak Mining Co. (Sub. Independence Mining Co.)
    Interest 67
    Home office Colorado
    Year 1993
    Last year 1994

Production statistics

  • Year 1952
    Description Gold Ore 435450 Mt/Year Ore Mined (About)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 435450mt
  • Year 1953
    Description Gold Ore 498000 Mt/Year Ore Mined
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 498000mt
  • Year 1954
    Description Gold Ore 533392 Mt/Year Ore Mined
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 533392mt
  • Year 1955
    Description Gold Ore 544320 Mt/Year Ore Mined
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 544320mt
  • Year 1956
    Description Gold Ore 599000 Mt/Year Ore Mined
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 599000mt
  • Year 1958
    Description Gold Ore 245000 Mt/Year Ore Mined (About)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 245000mt
  • Year 1959
    Description Gold Ore 912000 Mt/Year Ore Mined (About)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 912000mt
  • Year 1960
    Description Gold Ore 1007 Mt/Year Ore Mined (About)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 1007mt
  • Year 1961
    Description Gold Ore 816500 Mt/Year Ore Mined (About)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 816500mt
  • Year 1981
    Description Gold Concentrate 381 Mt/Year Conc.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Gold Gold 381mt

Comments on the production information

  • ACTUAL MILL RECOVERIES ARE 72.5% FOR GOLD AND 66.1% FOR SILVER.

Comments on the reserve resource information

  • THE RESERVES WERE ESTIMATED FROM DATA PROVIDED BY THE TEXASGULF STAFF CURRENTLY OPERATING THE MINE. MATRIX 1 REPRESENTS ESTIMATED IN SITU UNDERGROUND ORE RESERVES. MATRIX 2 IS THE ESTIMATED RESERVES CONTAINED IN SURFACE DUMPS.

Workings at the site

  • Type of workings Surface
    Area 6HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Swell Factor .1
    Percent Waste Rock 0
    Avg. Overburden Thickness 0
    Hardness of Ore SAND, SILT
    Capacity 219
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 0
    Units of Production $/MT ORE
    Operating Days per Year 240
    Operating Shifts per Day 2
    Year of Information 1983
  • Type of workings Underground
    Overall depth 329M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SHRINKAGE W/TIMBERED METHODS
    Swell Factor .6
    Percent Waste Rock 52
    Percent Recovery 90
    Hardness of Rock HARDROCK FISSURED WITH EXCESSIVE WATER
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Avg. Length of Adits (m) 9000
    Number of Adits 1
    1st Condition of Workings OPEN
    Capacity 53
    Capacity Units MT ORE/DAY
    Unit Production Cost 133.4
    Units of Production $/MT ORE
    Operating Days per Year 240
    Operating Shifts per Day 2
    Year of Information 1983

Comments on other economic factors

  • THE METHOD OF MINING IS MERELY THE LOADING AND HAULING OF ORE FROM EXISTING SURFACE DUMPS. THE SURFACE MINE COSTS ARE SHOWN AS ZERO IN THIS SET. ACTUALLY, SMALL SURFACE OPERATING AND CAPITAL COSTS ARE INCLUDED IN THE UNDERGROUND MINE COSTS. THE UNDERGROUND COSTS ARE THE TOTAL EXPENDITURES FOR THE ENTIRE SURFACE AND UNDERGROUND MINE OPERATIONS.

Reference information

Bibliographic references

  • Deposit

    CARLTON, C.H., G. MURRAY, AND W.C. KLEIN, APPRAISAL OF THE

  • Deposit

    CRIPPLE CREEK MINING DISTRICT. MARCH 1962, PP. 1-8 AND

  • Deposit

    APPENDIX IV.

  • Deposit

    GOLDEN CYCLE CORPORATION, 1981 ANNUAL REPORT. APRIL 12, 1982

  • Deposit

    PP. 1-32.

  • Deposit

    GOTT, G.B. DISTRIBUTION OF GOLD, TELLURIUM, SILVER, AND

  • Deposit

    MERCURY IN PART OF THE CRIPPLE CREEK DISTRICT. COLORADO

  • Deposit

    GEOLOGICAL SURVEY CIRCULAR 543, 1967, PP. 1-9.

  • Deposit

    COLORADO DIVISION OF MINES, INFORMATION REPORTS 1952-1982.

  • Deposit

    VISITED MAY 13, 1983 BY EVALUATOR.

  • Deposit

    BRECHTAL C., PROJECT MANAGER, TEXASGULF, INC. PERSONAL

  • Deposit

    CONTACTS AND FIELD VISIT, MAY 1983.

  • Deposit

    DUFFMAN T., METALLURGIST, TEXASGULF, INC. PERSONAL CONTACTS

  • Deposit

    AND FIELD VISIT, MAY 1983.

General comments

Subject category Comment text
Deposit THE ORE OCCURS IN NUMEROUS VEINS, FISSURES, AND IRREGULAR DEPOSITS HAVING VARIABLE ATTITUDES AND DIMENSIONS.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-MAR-1997 Gosling U.S. Bureau of Mines

Beyond USGS

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

External references

Maps centered on this site

Authoritative Colorado resources

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