The Black Horse Mine is a gold and silver mine located in La Plata county, Colorado at an elevation of 12,369 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: 12,369 Feet (3,770 Meters)
Commodity: Gold, Silver
Lat, Long: 37.59278, -107.60278
Map: View on Google Maps
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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Black Horse Mine MRDS details
Site Name
Primary: Black Horse Mine
Secondary: Patented Claim: Black Horse
Secondary: Ms 427
Commodity
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Copper
Tertiary: Zinc
Location
State: Colorado
County: La Plata
District: Needle Mountain (Tacoma, Florida, Vallecito) District
Land Status
Land ownership: National Forest
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.
Administrative Organization: San Juan N. F.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Type: R
Description: San Juan Uplift, San Juan Basin, San Juan Volcanic Field
Type: L
Description: Needle Mtns Uplift, Chicago Basin Stock, Eolus Batholith, Trimble Stock
Alterations
Not available
Rocks
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 10.100000+-1.100000
Material Analyzed: Zircon
Age Young: Miocene
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 1466.000000+-27.000000
Dating Method: Rb-Sr
Age Young: Precambrian
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 9.000000+-0.900000
Material Analyzed: Zircon
Age Young: Miocene
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 1460.000000+-70.000000
Dating Method: K-Ar
Age Young: Precambrian
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 1466.000000+-20.000000
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Precambrian
Name: Granite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 1460.000000+-70.000000
Dating Method: K-Ar
Age Young: Precambrian
Name: Granite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 1466.000000+-20.000000
Dating Method: U-Pb (zircon)
Material Analyzed: Zircon
Age Young: Precambrian
Name: Granite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 1466.000000+-27.000000
Dating Method: Rb-Sr
Age Young: Precambrian
Name: Granite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 9.000000+-0.900000
Material Analyzed: Zircon
Age Young: Miocene
Name: Granite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 10.100000+-1.100000
Material Analyzed: Zircon
Age Young: Miocene
Name: Rhyolite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 10.100000+-1.100000
Material Analyzed: Zircon
Age Young: Miocene
Name: Rhyolite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 9.000000+-0.900000
Material Analyzed: Zircon
Age Young: Miocene
Name: Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene
Analytical Data
Analytical Data: CHEMICAL ANALYSES CONTAINED 0.50 PPM AU, 7000 TO 17000 PPM CU, 1300 TO 2500 PPM PB, 800 PPM ZN, GT 100 PPM SB.
Analytical Data: SELECTED DUMP SAMPLE FROM LOWER PORTAL CONTAINED 0.04 OZ/TON AU, 37.56 OZ/TON AG, 0.20% CU, 0.36% PB, 0.65% ZN. SEMIQUANTITATIVE SPECTROGRAPHIC ANALYSES OF TWO SULFIDE-BEARING QUARTZ VEIN SAMPLES CONTAINED 30 AND 150 PPM TI, 70 PPM MN, 200 TO 300 PPM AG, 300 TO 500 PPM AS, 1000 TO 1500 PPM BA, 200 TO 500 PPM BI, LT 20 PPM CD, 5 PPM CR, 7000 TO 20000 PPM CU, 15 TO 20 PPM MO, 500 TO 1000 PPM PB, 700 PPM SB, LT 10 PPM SN, LT 100 TO 100 PPM SR, LT 10 TO 10 PPM V, LT 50 PPM W, 700 PPM ZN
Analytical Data: 8-INCH SAMPLE FROM NORTH SIDE OF SUBLEVEL CONTAINED 0.01 OZ/TON AU, 3.44 OZ/TON AG, 0.16% CU, 1.04% PB, 1.20% ZN
Analytical Data: STEVEN AND OTHERS' (1969) ASSAY OF 16-INCH SAMPLE FROM SOUTH FACE OF SUBLEVEL CONTAINED 0.02 OZ/TON AU, 3.94 OZ/TON AG, 0.63% CU, 0.72% ZN
Materials
Ore: Chalcopyrite
Ore: Sphalerite
Gangue: Quartz
Gangue: Fluorite
Comments
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). AT HEAD OF JOHNSON CREEK ON WEST SIDE OF VALLECITO BASIN 0.4 MILE SSW OF COLUMBINE PASS. ; INFO FROM LAND.ST :1974
Comment (Deposit): QUARTZ VEIN TRENDS N 10 E, DIP UNKNOWN BUT PROBABLY STEEPLY NE, AND PART OF GENERALLY NORTH-SOUTH-OR NNW-SSE-TRENDING REGIONAL FRACTURE SYSTEM.
Comment (Workings): UPPER ADIT DRIVEN WESTWARD FOR 10 FT; MIDDLE ADIT DRIVEN WESTWARD APPROX 50 FT; LOWER CROSSCUT DRIVEN WESTWARD UNKNOWN DISTANCE TO VEIN, DRIFT ON VEIN FOR UNKNOWN LENGTH, 50-FT RAISE WITH SUBLEVEL.
References
Reference (Deposit): SCHMITT, L.J., AND RAYMOND, W.H., 1977, GEOLOGY AND MINERAL DEPOSITS OF THE NEEDLE MOUNTAINS DISTRICT, SOUTHWESTERN COLORADO: USGS BULL. 1434, 40 P.
Reference (Deposit): STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 30-32, 55-67, 104-105, 162-163.
Reference (Deposit): CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.
Reference (Deposit): BLM MINERAL SURVEY MS 427
Colorado Mining Photos
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