The Dubuque Tunnel is a copper and lead mine located in Pitkin county, Colorado at an elevation of 9,400 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: 9,400 Feet (2,865 Meters)
Commodity: Copper, Lead
Lat, Long: 39.15361, -106.83389
Map: View on Google Maps
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Dubuque Tunnel MRDS details
Site Name
Primary: Dubuque Tunnel
Commodity
Primary: Copper
Primary: Lead
Location
State: Colorado
County: Pitkin
District: Aspen (Roaring Fork) District
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: Occurrence
Deposit Type: Vein
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 Uplift, Central Colorado Trough, Piceance Basin, White River Uplift, Elk Uplift
Type: L
Description: Castle Creek Fault Zone, Annie Fault, Dubuque Fault, Butte Fault, Silver Fault
Alterations
Not available
Rocks
Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene
Analytical Data
Not available
Materials
Ore: Galena
Ore: Chalcopyrite
Gangue: Barite
Comments
Comment (Deposit): TUNNEL DRIVEN EAST INTO EAST MARGIN OF CASTLE CREEK FAULT ZONE, PASSING THRU MAROON AND BELDEN FMS AND ENCOUNTERING CRUSHED ZONE OF SHALE AND PORPHYRY IN HANGING WALL OF APLITE PORPHYRY SILL. BELDEN FM FOUND ON OTHER (EAST) SIDE OF SILL, FOLLOWED BY SILICIFIED LIMESTONE (CASTLE BUTTE MBR) IN FAULT CONTACT (CASTLE CREEK FAULT) WITH PRECAMBRIAN QUARTZ MONZONITE. SILL APPEARS TO BE BOUNDED BY FAULTS ON BOTH SIDES, ON WEST BY ANNIE FAULT AND ON EAST BY DUBUQUE FAULT. BEDDING AND FAULTS DIP VERTICAL TO STEEPLY WEST. MAIN ORE FOUND IN SILICIFIED LIMESTONE NEXT TO QUARTZ MONZONITE. LOWER GRADE ORE FOUND AT FAULT CONTACT BETWEEN BELDEN AND MAROON FMS AND FARTHER WEST IN MAROON LIMESTONE.
Comment (Workings): ONE TUNNEL APPROX. 300 FT LONG HEADING GENERALLY EAST OR ENE
Comment (Location): WEST OF TOURTELLOTTE PARK ALONG UNNAMED BRANCH OF QUEENS GULCH. ELEV AND LAT-LONG FROM BRYANT (1972) ; INFO FROM LAND.ST :(1980)
References
Reference (Deposit): SPURR, J.E., 1898, GEOLOGY OF THE ASPEN DISTRICT, COLORADO: USGS MON. 31, P. 204, PL. 43
Reference (Deposit): BRYANT, BRUCE, 1971, GEOLOGIC MAP OF THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP GQ-933
Reference (Deposit): BRYANT, BRUCE, 1972, MAP SHOWING MINES, PROSPECTS, AND AREAS OF SIGNIFICANT SILVER, LEAD, AND ZINC PRODUCTION IN THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP I-785-D
Colorado Mining Photos
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