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Conger Mine

Past Producer in Boulder county in Colorado, United States with commodity 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. Reporter information

Geologic information

Identification information

Deposit ID 10107649
MRDS ID D001109
Record type Site
Mineralized Area Boulder Tungsten District
Current site name Conger Mine

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
Main Entrance -105.52212, 39.97327 (WGS84) 2621 10 Shaft shown on topo. Presumably this is the 991 ft shaft mentioned in ColoMetalMining, 1960, p. 22.
(click for info)
Main Entrance -105.52152, 39.97337 (WGS84) 10 Adit shown on topo east of shaft.

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nederland(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Vrain(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Arapaho and Roosevelt National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 001S 073W 11 Colorado

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Ferberite Ore

Alteration

  • (Local) Argillization In Granite, Sericitized And Silicified Next To Vein

Mineral occurrence model information

Model code 46
USGS model code 15a
Deposit model name W veins

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Precambrian
    Stratigraphic age (oldest) Precambrian

Nearby scientific data

Main Entrance (1) -105.52212, 39.97327
ListMap
Main Entrance (2) -105.52152, 39.97337
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Normal Faulting

Ore body information

  • Strike FEW DEGREES FROM NORTH
    Dip 50 TO 75 DEG. E

Comments on the ore body information

  • MOST TUNGSTEN VEINS 6IN TO 3FT THICK (Sharps, 1965)
  • FERBERITE IN VEINS WITH HORN QUARTZ IN WALL ROCK OF PEGMATITE AND GRANITE (deleted record DC03052 = 10108196)

Controls for ore emplacement

  • Flattening Of The Conger Vein Below The Fifth Level.

Comments on the geologic information

  • GEOL.DESC: TUNGSTEN MINERALIZ. IN CHALCEDONIC QTZ VEINS OF TERTIARY AGE CUTTING PRECAMB. GRANITE AND METAMORPHIC ROCKS. MINUTE CRYS. OF FERBERITE DISSEM. THRU FINE GR. QTZ (HORN ORE), AND COARSELY CRYS. FERBERITE FORMING BRECCIA WITH COUNTRY ROCK AND EARLY QTZ VEINS (SOFT ORE) (Sharps, 1965)

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant Yes
Discovery year 1900
Discoverer Sam Conger
Year of first production 1900

Mining district

District name Boulder County Tungsten District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner J. M. Smith And Guy Tanner[Turner?] (Underground) Cobb And Weldon (Surface)
    Year 1972
  • Type Owner-Operator
    Owner Vanadium Corp. Of America
    Home office Durango, Co. (NYC, NY)
    Year 1942

Comments on the production information

  • LARGEST PRODUCING TUNGSTEN MINE IN COLORADO.
  • OVER 100,000 UNITS WO3 (Sharps, 1965)

Workings at the site

  • Type of workings Underground
    Length 8046.5M
    Overall depth 282.24M
  • Type of workings Underground
    Length 8047M
    Overall depth 103M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Length of Inclines (m) 119
    Slope of Inclines 3
    Avg. Length of Adits (m) 21
    1st Condition of Workings CAVED AT PORTAL
    2nd Condition of Workings OPEN
    3rd Condition of Workings PLUGGED
    Capacity 25
    Capacity Units MT ORE/DAY
    Unit Production Cost 55
    Units of Production $/MT ORE
    Year of Information 1973

Comments on the workings information

  • 991 FT. SHAFT WITH OVER 5 MILES OF HORIZONTAL WORKINGS. THIS MINE IS THE DEEPEST IN THE DISTRICT BY NEARLY 400 FT.

Reference information

Bibliographic references

  • Deposit

    LEMMON, D.M., UNPUBLISHED DATA.

  • Deposit

    LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.

  • Deposit

    COLO. STATE METAL MINING FUND, 1960, TUNGSTEN MINES OF COLORADO.

  • Deposit

    LOVERING, TWETO, 1953, GEOLOGY AND ORE DEPOSITS OF THE BOULDER COUNTY TUNGSTEN DISTRICT COLORADO: USGS PROF. PAPER 245.

  • Production

    LEMMON, D.M., (UNPUBLISHED DATA)

  • Deposit

    SHARPS, 1965, Tungsten in Colorado: COLO SCH MINES MIN IND BULL, V. 8, NO. 5.

  • Deposit

    McKenna, 1940, The geology of the Conger Mine, Boulder County, Colorado: Univ. of Colo. MS THESIS, 78 p.

  • Deposit

    MINE MAP REPO # 402533 402543

  • Deposit

    Lovering, T.S., and Goddard, E.N., 1950, Geology and ore deposits of the Front Range, Colorado: USGS PROF PAPER 223, PL

  • Deposit

    U.S. Bureau of Mines, 1945, Boulder County Tungsten District, Boulder County, Colorado: U.S. Bureau of Mines War Minerals Report No. 404, 26 p.

  • Deposit

    CONSV. DIV. COMP. DATE, 10,62

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-04-01 Elliott, James E. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 1995-06-09 Mosier, Dan U.S. Geological Survey
Editor 2007-05-29 Melton, Greg U.S. Geological Survey MRDS DC00090 = 10015977 (Beddig, Conger), DC03052 = 10108196,
Editor 2013-12-10 Wilson, Anna B U.S. Geological Survey merged and deleted multiple duplicate records.
Reporter 1972-07-01 Conservation Division Files U.S. Geological Survey MRDS DC00090 (=10015977)
Reporter 1973-03-01 Conservation Division Files U.S. Geological Survey MRDS DC03052 = 10108196
Reporter 1974-01-01 Unknown U.S. Geological Survey MRDS DC03052 = 10108196
Reporter 1985-05-13 Unknown U.S. Bureau of Mines MAS 0080130022 (10256901)

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.