Illinois

Past Producer in Boulder county in Colorado, United States with commodities Gold, Silver, Tungsten
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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10304503
MRDS ID DC00102
MAS/MILS ID 80130417
Record type Site
Current site name Illinois
Related records 10108022

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -105.52583, 39.96956 (WGS84)
Elevation 2621
Location accuracy 10(meters)
Relative position Shaft labeled on topo.

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 01S 073W 11 SE Colorado

Commodities

Commodity Importance
Gold Tertiary
Silver Tertiary
Tungsten Critical Primary

Materials information

Materials Type of material
Ferberite Ore

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 Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Precambrian

Nearby scientific data

Ore Body (1) -105.52583, 39.96956

Economic information

Comments on the ore body information

  • 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) (copied from deleted record 10108022)

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Boulder Tungsten

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Cold Spring Tungsten, Inc.
    Year 1960
  • Type Operator
    Owner VCA
    Year 1960
    Last year 1952
  • Type Unknown
    Owner Wolf Tongue Mining Co.
    Year 1945

Production statistics

  • Year 1943
    Period 1905-1943
    Material ore
    Ore mined 9968.96mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tungsten Tungsten 25905WO3 3wt-pct

Comments on the production information

  • About 26,500 units, in ore averaging 2.5 (Metal Mining Fund Board, 1960, p. 40)

Comments on the workings information

  • 500' shaft; levels at 145, 200, 300, 400, and 500 feet. Illinois 4, and Illinois Extension 3, via the Oregon and Beddig mines, join the Conger, but 25' below Conger 3. (Metal Mining Fund Board, 1960, p. 40)

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MOST TUNGSTEN VEINS 6IN TO 3FT THICK (copied from deleted record 10108022)

Reporter information

Type Date Name Affiliation Comment
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Editor 2007-05-29 Melton, Greg U.S. Geological Survey
Editor 2013-12-11 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate records. Added references. Corrected and added info.
Reporter 1972-07-01 Conservation Division Files U.S. Geological Survey old MAS record DC00192

Beyond USGS

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

External references

Authoritative Colorado resources

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