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

Early Spring

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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Ownership information
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10166179
MAS/MILS ID 80130265
Record type Site
Current site name Early Spring

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.46389, 39.98178 (WGS84)
Elevation 2377
Location accuracy 50(meters)
Relative position 400 ft. S of Philadelphia Shaft

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tungsten(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 072W 8 NE4 of NE4 Colorado

Commodities

Commodity Importance
Tungsten Critical Primary

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

Nearby scientific data

Main Entrance (1) -105.46389, 39.98178
ListMap

Economic information

Comments on the ore body information

  • Small veins in granite. (ColoMetalMining, 1960, p. 30)

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 Frank Robbins
    Year 1960
  • Type Operator
    Owner Roy Peterson
    Year 1960
    Last year 1918

Comments on the ownership information

  • Last operator was Roy Peterson, about 1918.

Workings at the site

  • Type of workings Underground

Reference information

Bibliographic references

  • Deposit

    Lovering and Tweto, 1950, USGS PROF PAPER 223, PLATE 3.

  • Deposit

    Colorado Metal Mining Fund Board, 1960, Tungsten Mines of Colorado.

Reporter information

Type Date Name Affiliation Comment
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Editor 2007-05-22 Melton, Greg U.S. Geological Survey
Editor 2014-01-31 Wilson, Anna B U.S. Geological Survey

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.