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Horseshoe Mine

Past Producer in Fremont county in Colorado, United States with commodities Copper, Zinc, Lead, Gold, Silver, Iron, Uranium
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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. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. General comments
  25. Reporter information

Geologic information

Identification information

Deposit ID 10087784
MRDS ID D009627
Record type Site
Current site name Horseshoe Mine
Alternate or previous names School Section Deposit
Related records 10118141

Geographic coordinates

Point of reference Pit
Geographic coordinates: -105.32918, 38.3914 (WGS84)
Elevation 1828
Location accuracy 100(meters)
Relative position 6.1 MILES S 59 W OF CANON CITY POST OFFICE, probable location pit

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Royal Gorge(quadrangle 1:24,000 scale)

Canon City(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 019S 071W 16 SE Colorado

Comments on the location information

  • SOUTH OF GRAPE CREEK; 7 MILES SW OF CANON CITY ON TEMPLE CANYON ROAD, THEN UPSTREAM 1.5 MILES ALONG GRAPE CREEK TO MINE; EAST OF HORSESHOE MOUNTAIN ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Lead Primary
Gold Secondary
Silver Secondary
Iron Tertiary
Uranium Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gahnite Ore
Galena Ore
Gold Ore
Malachite Ore
Pyrite Ore
Silver Ore
Uraninite Ore
Actinolite Gangue
Biotite Gangue
Garnet Gangue

Alteration

  • (Local) Altered Biotite Gneisses; Kaolinization

Analytical data

Result ZN (0.12 TO 12.5 %), CU (0.09-2.0 %), PB (0.11-4.6 %), AG (0.3-1.7 OZ/TON)

Mineral occurrence model information

Model code 271
USGS model code Unassigned
Deposit model name Stratabound Precambrian sulfide, Colorado and Wyoming
Model code 32
USGS model code 13
Deposit model name Pegmatites

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Paleoproterozoic
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Migmatitic Gneiss
    Rock description Migmatitic Gneiss
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Economic information

Geologic structures

Type of structure Regional
Structure description Northern Wet Mountains, Canon City Embayment, Thirtynine Mile Volcanic Field
Type of structure Local
Structure description Horseshoe Fault, Major Fault With Trend Ene, Cut By Small, Local Shears, Minor Folding; Webster Park Graben

Ore body information

  • Strike N 82 E
    Dip S 62 E
    Thickness 4.57M

Controls for ore emplacement

  • Faults, Fault Intersections; Shear Zones

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1943
Year of last production 1947

Mining district

District name Grape Creek Area

Land status

Ownership category State

Ownership information

  • Type Owner
    Owner Asarco Mining Co

Production statistics

  • Year 1947
    Period 1943-1947
    Material Ag-Cu-Pb-Zn ore
    Ore mined 5970mt
    Accuracy Accurate
    Description Cp_Grade: ^2.76% Zn, 1.02% Pb, 0.27% Cu, 0.29 Oz/Ton Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Gold Gold 0g/mt
    Major Ore Copper Copper 0wt-pct
    Major Ore Lead Lead 1wt-pct
    Minor Ore Silver Silver 10g/mt
    Major Ore Zinc Zinc 3wt-pct
  • Year 1956
    Material U ORE
    Accuracy Accurate
    Description Ap_Grade: ^0.36 % U308
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 0wt-pct

Reserves and resources

  • Type In-situ
    Name ore
    Estimate year 1982
    Inferred 450mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 10.8 wt-pct Zinc Major 1982
    Copper Cu 0.3 wt-pct Copper Major 1982

Comments on the reserve resource information

  • USBM REPORTS

Workings at the site

  • Type of workings Underground
    Area 1.709HA
    Length 183.79M
    Overall depth 22.86M
    Overall length 198.12M
    Overall width 91.44M

Comments on the workings information

  • 3 ACCESS SHAFTS, 3 ADITS, 2 LARGE OPEN STOPES; SHAFT 1 IS ACCESS FOR STOPE1. STOPE 1 STRIKES N 82 E, DIPS S 62 E. IT IS UP TO 100 FT LONG WHERE OPEN AT SURFACE, 75 FT DEEP, 6-8 FT WIDE. SHAFT 2 IS UPPER ACCESS TO STOPE 1. SHAFT 3 INACCESSIBLE, BUT DIPS S 75 E. ADIT 1 IS 20 FT PROSPECT BEARING S 65 W. ADIT 2 IS LOWER ACCESS TO STOPE 2, DRIVEN S 20 E FOR 73 FT, WITH 225 FT DRIFTS, NOW BACKFILLED. ADIT 3 IS UPPER ACCESS TO STOPE 2, DRIVEN S 3 W FOR 26 FT, WITH 19 FT DEVELOPMENT DRIFT. STOPE 2 STRIKES S 75 W, DIPS 69 ESE FOR 65 FT. WIDTH 6-8 FT, OPEN TO SURFACE

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SULFIDE-BEARING ZONE LIES AT OR NEAR CONTACT BETWEEN DOMINANTLY VOLCANIC-ORIGIN ROCKS (FOOTWALL) AND DOMINANTLY SEDIMENTARY-ORIGIN ROCKS ON SOUTH (HANGING WALL)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-82 Collins, Donna B. 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.