The Great Mogul Tunnel is a lead, copper, silver, and zinc mine located in Saguache county, Colorado at an elevation of 11,083 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: 11,083 Feet (3,378 Meters)
Commodity: Lead, Copper, Silver, Zinc
Lat, Long: 38.32417, -106.11750
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.
Great Mogul Tunnel MRDS details
Site Name
Primary: Great Mogul Tunnel
Secondary: First Chance Mine
Commodity
Primary: Lead
Primary: Copper
Primary: Silver
Primary: Zinc
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
Deposit Size: S
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: Andesite
Role: Associated
Age Type: Host Rock Unit
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Analytical Data
Analytical Data: 48, 0.14, 15.8, 0.7, 1.9. DUMP OXIDE ASSAYED 0.03 OZ/TON AU, 7.2 OZ/TON AG, 2.9% CU, 1.9% PB. DUMP (GENERAL) ASSAYED 7.2 OZ/TON AG, 1.5% CU, 3.1% PB. SACKED ORE ASSAYED 0.01 OZ/TON AU, 48.0 OZ/TON AG, 2.1% CU, 0.5% PB.
Analytical Data: 14, 0.02, 5.0, 0, 2.2
Analytical Data: 42, 0.08, 10.9, 0.8, 3.4
Analytical Data: 28, 0, 3.8, 0, 1.2
Analytical Data: 62, 0.02, 5.7, 0, 1.2
Analytical Data: 42, 0.02, 8.2, 0, 1.6
Analytical Data: 48, 0.01, 9.0, 0, 2.9
Analytical Data: EACH SET OF VALUES IS SAMPLED THICKNESS (INCHES), OZ/TON AU, OZ/TON AG, % CU, % PB: 30, 0.08, 14.2, 2.3, 2.9
Analytical Data: 18-INCH VEIN SAMPLE FROM STOPE ON UPPER MOGUL TUNNEL ASSAYED 0.01 OZ/TON AU, 5.0 OZ/TON AG, 1.2% PB. FOLLOWING ASSAYS FROM LOWER MOGUL TUNNEL
Materials
Ore: Pyrite
Ore: Galena
Ore: Tennantite
Ore: Sphalerite
Gangue: Quartz
Gangue: Barite
Comments
Not available
References
Reference (Deposit): PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.
Reference (Deposit): BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
