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

Free Coinage

Producer in Boulder county in Colorado, United States with commodities Silver, Gold
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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. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Production statistics
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10108245
MRDS ID DC03574
Record type Site
Current site name Free Coinage

Geographic coordinates

Geographic coordinates: -105.47059, 40.03305 (WGS84)
Relative position SE 1/4. SE SIDE OF PENNSYLVANIA GULCH, 0.3 MI. S. OF SUNSET

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gold Hill(quadrangle 1:24,000 scale)

Estes Park(quadrangle 1:100,000 scale)

Greeley(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 01N 72W 20 Colorado

Commodities

Commodity Importance
Silver Primary
Gold Primary

Materials information

Materials Type of material
Gold Ore
Silver Ore

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) Laramide intrusive rocks
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: LEAD-SILVER ORE IN VEIN OCCUPYING 50 FT. WIDE FAULT ZONE BETWEEN SCHIST AND TRACHYTE DIKE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Mining district

District name Sunset

Production statistics

  • Year 1916
    Period 1911-1916
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 207g/mt

Comments on the production information

  • TOTAL $50,000

Reference information

Bibliographic references

  • Deposit

    LOVERING AND GODDARD, 1950, USGS PP 223, PG 212, PL 3 (N)

  • Deposit

    WORCESTER, 1921, COLO. GEOL. SUR. BULL 21, PL. 1.

  • Deposit

    BLM COLO. CONNECTING SHEETS

  • Deposit

    CONSV. DIV. COMP. DATE, 1,62

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1973 Conservation Division Files U.S. Geological Survey
Updater 21-MAY-0007 Melton, Greg 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.