The Golden Shear Mine is a gold and silver mine located in San Juan county, Colorado at an elevation of 12,799 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: 12,799 Feet (3,901 Meters)
Commodity: Gold, Silver
Lat, Long: 37.71556, -107.53333
Map: View on Google Maps
Satelite View
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.
Golden Shear Mine MRDS details
Site Name
Primary: Golden Shear Mine
Secondary: Patented Claim: Bonita
Secondary: Ms 11327
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Secondary: Lead
Tertiary: Zinc
Tertiary: Tellurium
Tertiary: Antimony
Location
State: Colorado
County: San Juan
District: Beartown (Bear Creek) District
Land Status
Administrative Organization: San Juan N. F. (?)
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1893
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: Alkaline Au-Te (Au-Ag-Te veins)
Orebody
Not available
Structure
Type: R
Description: San Juan Uplift, San Juan Volcanic Field
Type: L
Description: San Juan Uplift, Unnamed Fault
Alterations
Not available
Rocks
Name: Rhyodacite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Rhyodacite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Rhyodacite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Analytical Data: STEVEN AND OTHERS' (1969) SEMIQUANTITATIVE SPECTROGRAPHIC ANALYSIS OF SAMPLE FROM VEIN SHOWED 5000 PPM TI, 70 PPM MN, 0.7 PPM AG, LT 200 PPM AS, 500 PPM BA, LT 10 PPM BI, LT 20 PPM CD, LT 5 PPM CO, 300 PPM CR, 20 PPM CU, LT 5 PPM MO, 70 PPM NI, 300 PPM PB, LT 100 PPM SB, LT 10 PPM SN, 1000 PPM SR, 150 PPM V, LT 50 PPM W, LT 200 PPM ZN, 2 PPM FE. CHEMICAL ANALYSIS SHOWED 0.3 PPM AU, 18 PPM CU, 52 PPM PB, 140 PPM ZN, 16 PPM MO, LT 10 PPM AS, 2 PPM SB, 1 PPM HG, 6.3 PPM TE, 4.6 PPM AG.
Materials
Ore: Sphalerite
Ore: Chalcocite
Ore: Sylvanite
Ore: Tetrahedrite
Ore: Galena
Ore: Bornite
Ore: Marcasite
Ore: Petzite
Ore: Chalcopyrite
Ore: Calaverite
Gangue: Limonite
Gangue: Calcite
Gangue: Barite
Gangue: Quartz
Gangue: Hematite
Comments
Comment (Commodity): TELLURIDES, (EXCEPT SYLVANITE) CU-PB-ZN SULFIDES, AND OXIDIZED ORES LISTED ARE REPORTED GENERALLY FOR DISTRICT AND NOT SPECIFICALLY MENTIONED AT THIS MINE. MINOR PRODUCTION OF CU AND PB LIKEWISE NOT VERIFIED.
Comment (Deposit): MINE DEVELOPED ON SMALL PYRITE-BEARING QUARTZ VEIN, TREND UNKNOWN BUT POSSIBLY NNE, IN EAST-WEST TRENDING QUARTZITE FAULT BLOCK WEST OF CENTRALLY CONCENTRATED PRODUCTIVE VEINS.
Comment (Workings): POSSIBLE SURFACE CUTS AND GENERALLY SOUTHWARD-HEADING TUNNEL OF UNKNOWN EXTENT
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON NORTH SIDE OF UNNAMED PEAK ON CONTINENTAL DIVIDE 1.75 MILES SW OF BEARTOWN SITE (UNSURVEYED SECTION). ; INFO FROM LAND.ST :41? 01 1977
References
Reference (Deposit): STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.
Reference (Deposit): CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.
Reference (Deposit): BLM MINERAL SURVEY MS 11327
Reference (Deposit): PROSSER, W.C., 1911, THE BEAR CREEK SYLVANITE CAMP, COLORADO: ENG. MINING JOUR., V. 91, P. 712.
Reference (Deposit): STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 67-71, 89-90.
Colorado Mining Photos
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