Dubuque Tunnel

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

Name: Dubuque Tunnel  

State:  Colorado

County:  Pitkin

Elevation: 9,400 Feet (2,865 Meters)

Commodity: Copper, Lead

Lat, Long: 39.15361, -106.83389

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.


Satelite image of the Dubuque Tunnel

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

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.