The Horseshoe Mine is a lead, zinc, and copper mine located in Fremont county, Colorado at an elevation of 5,997 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 5,997 Feet (1,828 Meters)
Commodity: Lead, Zinc, Copper
Lat, Long: 38.39139, -105.32861
Map: View on Google Maps
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Horseshoe Mine MRDS details
Site Name
Primary: Horseshoe Mine
Secondary: School Section Deposit
Commodity
Primary: Lead
Primary: Zinc
Primary: Copper
Secondary: Silver
Secondary: Gold
Tertiary: Uranium
Tertiary: Iron
Location
State: Colorado
County: Fremont
District: Grape Creek Area
Land Status
Land ownership: State
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Asarco Mining Co
Production
Year: 1956
Material type: U ORE
Description: Ap_Grade: ^0.36 % U308
Year: 1947
Time Period: 1943-1947
Mined: 5970.000 mt
Material type: Ag-Cu-Pb-Zn ore
Description: Cp_Grade: ^2.76% Zn, 1.02% Pb, 0.27% Cu, 0.29 Oz/Ton Ag
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Year First Production: 1943
Year Last Production: 1947
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont
Mineral Deposit Model
Model Name: Stratabound Precambrian sulfide, Colorado and Wyoming
Model Name: Pegmatites
Orebody
Not available
Structure
Type: R
Description: Northern Wet Mountains, Canon City Embayment, Thirtynine Mile Volcanic Field
Type: L
Description: Horseshoe Fault, Major Fault With Trend Ene, Cut By Small, Local Shears, Minor Folding; Webster Park Graben
Alterations
Alteration Type: L
Alteration Text: Altered Biotite Gneisses; Kaolinization
Rocks
Name: Granodiorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Granodiorite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Granodiorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleoproterozoic
Name: Granodiorite
Role: Associated
Age Type: Associated Rock
Age Young: Paleoproterozoic
Analytical Data
Analytical Data: ZN (0.12 TO 12.5 %), CU (0.09-2.0 %), PB (0.11-4.6 %), AG (0.3-1.7 OZ/TON)
Materials
Ore: Gahnite
Ore: Uraninite
Ore: Chalcopyrite
Ore: Malachite
Ore: Gold
Ore: Pyrite
Ore: Silver
Ore: Galena
Gangue: Garnet
Gangue: Actinolite
Gangue: Biotite
Comments
Comment (Location): 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)
Comment (Reserve-Resource): USBM REPORTS
Comment (Deposit): SULFIDE-BEARING ZONE LIES AT OR NEAR CONTACT BETWEEN DOMINANTLY VOLCANIC-ORIGIN ROCKS (FOOTWALL) AND DOMINANTLY SEDIMENTARY-ORIGIN ROCKS ON SOUTH (HANGING WALL)
Comment (Workings): 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
References
Reference (Production): COKER, 1982; NELSON-MOORE AND OTHERS, 1978.
Reference (Deposit): NELSON-MOORE, J. L., COLLINS, D. B. AND HORNBAKER, A. L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 151.
Reference (Deposit): RAYMOND, W. H. AND SHERIDAN, D. M., 1980, DATA ON SOME STRATABOUND PRECAMBRIAN DEPOSITS CONTAINING ZINC, COPPER, LEAD, SILVER, AND GOLD IN THE ROYAL GORGE 15-MINUTE QUADRANGLE, COLORADO: USGS OFR 80-833, 8P.
Reference (Deposit): TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., AND EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1: 62,500.
Reference (Deposit): COKER, R. J., 1982, MINERAL RESOURCES OF THE ARKANSAS CANYON PLANNING UNIT WITH SPECIAL EMPHASIS ON THE FORMER GRAPE CREEK WILDERNESS STUDY AREAS AND THE MCINTYRE HILLS WILDERNESS STUDY AREA: US BLM MINERAL REPORT, P. 15-20
Colorado Mining Photos
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