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  3. Mineral Resource Data System (MRDS)

Free Gold Mine

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

Geologic information

Identification information

Deposit ID 10013998
MRDS ID D010591
Record type Site
Current site name Free Gold Mine
Alternate or previous names Patented Claims: Air Dale Lode, Copper Butte, Big Horn No. 1, Free Gold, Gold Spark, Silver Dollar, Lancaster, MS 17457, U Npatented Claims: Pandora Nos. 1-7, Lucky Horseshoe

Geographic coordinates

Geographic coordinates: -105.59921, 40.72137 (WGS84)
Elevation 2563
Relative position 29.1 MILES N72W FROM FORT COLLINS

Site location context

Political divisions (FIPS codes)

Larimer(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rustic(quadrangle 1:24,000 scale)

Fort Collins(quadrangle 1:100,000 scale)

Greeley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Cache La Poudre(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 Larimer

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 009N 073W 20 S2 Colorado

Comments on the location information

  • NORTH OF SEVENMILE CREEK ON EDGE OF OVERLAND EROSIONAL SURFACE 0.5 TO 0.7 MILE SOUTH OF MANHATTAN. ELEV AND LAT-LONG GIVEN ARE FOR APPRO X CENTER OF BIG HORN CLAIM ON SOUTH QUARTER CORNER OF SEC. 20 ; INFO FROM LAND.ST :1980

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Laramide Intrusive Rocks--Quartz Monzonite Porphyry
    Rock description Laramide Intrusive Rocks--Quartz Monzonite Porphyry
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Metamorphic Rocks--Felsic And Hornblendic Gneisses;Laramide Intrusive Rocks--Quartz Monzonite Porphyry
    Rock description Metamorphic Rocks--Felsic And Hornblendic Gneisses;Laramide Intrusive Rocks--Quartz Monzonite Porphyry

Nearby scientific data

(1) -105.59921, 40.72137
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Front Range Uplift, Sherman Batholith
Type of structure Local
Structure description Poudre River Shear Zone, Elkhorn Creek Shear Zone

Ore body information

  • Thickness 1.52M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1905
Discoverer Manhattan Placer And Quartz Gold Mining Co. (Lancaster Claimant)
Year of last production 1939

Mining district

District name Manhattan District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Sackett, T. H. And Others
    Home office Livermore
    First year 1939
  • Type Owner
    Owner Tim Sullivan
    Home office Log Cabin
    First year 1939

Production statistics

  • Year 1938
    Description Ap_Grade: ^0.12 Oz/Ton Au (Milling Ore)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Milling Ore Gold Gold 3g/mt

Comments on the workings information

  • SURFACE CUTS; 30-FT VERTICAL SHAFT, 175-FT INCLINED SHAFT WITH ON E LEVEL

Comments on development

  • ASSESSMENT WORK FROM 1927-31. PRODUCTION OF CRUDE ORE, MILLING OR E, AND MILL CONCENTRATES FROM 25-TPD MILL IN 1938 AND 1939.

Reference information

Bibliographic references

  • Deposit

    LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS O F THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 285-286.

  • Deposit

    COLORADO DIV. MINES INF. REPT. AND ANNUAL OPERATOR REPTS.

General comments

Subject category Comment text
Deposit AIRPHOTOS INDICATE PROBABLE QUARTZ MONZONITE DIKE TRENDING N63W I N N2 SEC. 29 SOUTH OF PRESUMED CLAIM LOCATION. VEIN IS EXTENSION OF CO LORADO AND MONTE CRISTO VEINS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1983 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

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

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.