Bonanza Mine

The Bonanza Mine is a silver mine located in Custer county, Colorado at an elevation of 8,901 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: Bonanza Mine  

State:  Colorado

County:  Custer

Elevation: 8,901 Feet (2,713 Meters)

Commodity: Silver

Lat, Long: 38.08806, -105.33528

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 Bonanza Mine

Bonanza Mine MRDS details

Site Name

Primary: Bonanza Mine


Commodity

Primary: Silver


Location

State: Colorado
County: Custer
District: Rosita


Land Status

Land ownership: Federal
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: Underground


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1882
Discovery Method: Ore-Mineral In Place
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: Rosita Volcanic Center, Wet Mtns

Type: L
Description: Volcanic Vent; Vein At Contact Of Two Units


Alterations

Alteration Type: L
Alteration Text: None Reported; Possibly Mild Argillization


Rocks

Name: Rhyodacite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene

Name: Rhyodacite
Role: Associated
Age Type: Host Rock
Age Young: Miocene


Analytical Data

Not available


Materials

Gangue: Barite
Gangue: Quartz


Comments

Comment (Location): SOUTH SLOPE OF WAKEFIELD HILL ; INFO FROM LAND.ST :(1976)

Comment (Deposit): Discovery Year: 1870-1895

Comment (Workings): TWO SHAFTS ON VEIN, SHORT DRIFT ON DEEPER SHAFT; SECOND SHAFT TO NORTH AND ABOUT 100 FEET DEEP


References

Reference (Deposit): CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.

Reference (Deposit): EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 405-472.

Reference (Deposit): SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.


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.