The Cronje Tunnel is a silver, zinc, lead, and copper mine located in Saguache county, Colorado at an elevation of 10,259 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: 10,259 Feet (3,127 Meters)
Commodity: Silver, Zinc, Lead, Copper
Lat, Long: 38.30361, -106.12528
Map: View on Google Maps
Satelite View
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Cronje Tunnel MRDS details
Site Name
Primary: Cronje Tunnel
Commodity
Primary: Silver
Primary: Zinc
Primary: Lead
Primary: Copper
Secondary: Gold
Location
State: Colorado
County: Saguache
District: Bonanza (Kerber Creek)
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
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Sawatch Range, San Juan Volcanic Field, Rio Grande Rift
Type: L
Description: Bonanza Caldera
Alterations
Alteration Type: L
Alteration Text: Early Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solutions Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite.
Rocks
Name: Latite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Name: Latite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Analytical Data
Analytical Data: ASSAYS FROM CLIFF TUNNEL YIELD TRACE TO 0.4 OZ/TON AU, 0.7 TO 12.8 OZ/TON AG, TRACE TO 0.8% CU, 0.5 TO 7.4% PB, 18 TO 22% ZN
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Comments
Comment (Location): S-T-R, LAT-LONG, AND ELEV. TAKEN FROM BURBANK'S (1932) PLATE 1 (SCALE 1:12000). MINE OR CLAIM LIES ALONG COPPER GULCH 1300 FT NE OF ST. LOUIS MINE ; INFO FROM LAND.ST :(1976)
Comment (Deposit): ABOVE ATTITUDE IS FOR CLIFF VEIN
Comment (Workings): ACCORDING TO GEOLOGIC MAP, TUNNEL DRIVEN S42E FOR APPROX. 900 FT. AT 750 FT, TUNNEL PRESUMABLY INTERSECTS CLIFF VEIN AND WORKINGS.
References
Reference (Deposit): BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.
Reference (Deposit): PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.
Colorado Mining Photos
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