The Geyser Mine is a lead and silver mine located in Custer county, Colorado at an elevation of 7,999 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: 7,999 Feet (2,438 Meters)
Commodity: Lead, Silver
Lat, Long: 38.13889, -105.44083
Map: View on Google Maps
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Geyser Mine MRDS details
Site Name
Primary: Geyser Mine
Secondary: Security-Geyser
Secondary: Fleetwood Tunnel
Commodity
Primary: Lead
Primary: Silver
Secondary: Gold
Secondary: Copper
Secondary: Zinc
Location
State: Colorado
County: Custer
District: Silver Cliff
Land Status
Land ownership: Private
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: Unknown
Ownership
Not available
Production
Year: 1911
Time Period: 1880-1911?
Year: 1882
Year: 1880
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1880
Year Last Production: 1911
Discovery Year: 1878
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Epithermal veins
Orebody
Form: VEINS
Structure
Type: R
Description: Silver Cliff Volcanic Center, Wet Mtns, Wet Mtn Valley
Type: L
Description: Silver Cliff Graben, Fault; Geyser Vent, Breccia Pipes
Alterations
Alteration Type: L
Alteration: Weak Argillization
Alteration Text: Weak Argillization
Rocks
Name: Gneiss
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Gneiss
Role: Associated
Age Type: Host Rock
Age Young: Miocene
Name: Gneiss
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene
Name: Gneiss
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Analytical Data: IN VEINS AVG 250-300 OZ/TON
Analytical Data: SB PRESENT
Materials
Ore: Polybasite
Ore: Chalcopyrite
Ore: Argentite
Ore: Galena
Ore: Tetrahedrite
Ore: Hessite
Ore: Gold
Ore: Sphalerite
Ore: Pyrargyrite
Gangue: Garnet
Gangue: Chalcedony
Gangue: Barite
Gangue: Calcite
Gangue: Topaz
Gangue: Quartz
Comments
Comment (Location): NORTH OF CHLORIDE GULCH ; INFO FROM LAND.ST :(1976)
Comment (Workings): THIS IS THE DEEPEST MINE ON THE PLATEAU; MANY LEVELS INCLUDING 500, 700, 750, 1450, 1850, 2000, 2100 FT BELOW SURFACE; MINE BEGAN AT BASE OF SILVER CLIFF/RACINE BOY QUARRY; MOST WORKINGS TO WEST AND NORTHWEST, SOME SOUTH
Comment (Geology): CHARCOAL IS PRESENT TO AT LEAST 2000 FT BELOW SURFACE
Comment (Deposit): THIS MINE WAS INTENDED TO EXPLORE THE "ROOTS" OF THE ORE UNDER THE RACINE BOY AND SILVER CLIFF QUARRIES; HIT ORE AT DEPTH. SEVERAL HORIZONS IN SHAFT HIT WATER DISCHARGING AT GREATER THAN 100 GPM. ; INFO.SRC : 1 PUB LIT
Comment (Deposit): THE ORE BECAME RICHER AT DEPTH; VEINS NEARLY VERTICAL DIP; WHERE ORE IS BOTRYOIDAL ORDER OF DEPOSITION: 1) BARITE, 2) GALENA, ARGENTITE, 3) COPPER SULFIDES, 4) TETRAHEDRITE, 5) CHALCOPYRITE
References
Reference (Deposit): SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.
Reference (Production): COLORADO DIVISION MINES INSPECTOR REPORTS, ANNUAL REPORTS
Reference (Deposit): FIELDMAN, D.W. AND CROWLEY, F.P., 1980, SILVER DEPOSITS IN THE SOUTHERN PORTION OF THE SILVER CLIFF CALDERA, IN SILVER CLIFF VOLCANIC CENTER AND TALLAHASSEE CREEK URANIUM DEPOSITS: DENVER REGIONAL EXPLORATION GEOLOGISTS GUIDEBOOK, P. 1-14.
Reference (Deposit): EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.
Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403
Colorado Mining Photos
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