Alderman Deposit

The Alderman Deposit is a fluorine-fluorite mine located in Chaffee county, Colorado at an elevation of 7,402 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: Alderman Deposit  

State:  Colorado

County:  Chaffee

Elevation: 7,402 Feet (2,256 Meters)

Primary Mineral: Fluorine-Fluorite

Lat, Long: 38.62528, -106.06444

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 Alderman Deposit

Alderman Deposit MRDS details

Site Name

Primary: Alderman Deposit


Commodity

Primary: Fluorine-Fluorite
Tertiary: Manganese


Location

State: Colorado
County: Chaffee
District: Browns Canyon 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

Type: Unknown


Ownership

Owner Name: James Bopp
Years: 1945 -

Owner Name: John Alderman And Associates
Years: 1945 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1927
Year Last Production: 1949
Discovery Year: 1923
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

Model Name: Fluorspar deposits (fluorite veins)


Orebody

Not available


Structure

Type: R
Description: Southern Mosquito Range, Arkansas Valley Graben

Type: L
Description: Folds, Faults; N-Trending Fault Bounding Arkansas Valley


Alterations

Alteration Type: L
Alteration Text: Silicification, Fluoritization


Rocks

Name: Gneiss
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Gneiss
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic


Analytical Data

Analytical Data: ESTIMATED AVERAGE 30% CAF2


Materials

Ore: Fluorite
Gangue: Quartz
Gangue: Kaolinite
Gangue: Montmorillonite
Gangue: Pyrite
Gangue: Calcite
Gangue: Psilomelane
Gangue: Manganite
Gangue: Pyrolusite
Gangue: Barite
Gangue: Opal
Gangue: Hematite
Gangue: Goethite


Comments

Comment (Location): SE OF HECLA JUNCTION, EAST OF US HWY 285, WEST OF ARKANSAS RIVER; SE/4 SEC. 34, T 51 N, R 8 E. INFO FROM LAND.ST :(1976)

Comment (Production): SMALL QUANTITY OF METALLURGICAL-GRADE FLUORSPAR MINED AND SHIPPED IN 1944-1945

Comment (Workings): CROSSCUT ADIT, DRIFT, PITS.


References

Reference (Deposit): VAN ALSTINE, R.E. AND COX, D.C., 1969, FLUORSPAR MINES AND PROSPECTS, IN, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS NE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 626, P. 38-43

Reference (Deposit): BRADY, B.T., 1975, MAP SHOWING FLUORSPAR DEPOSITS IN COLORADO: USGS MAP MR-70, 1:500,000, TEXT

Reference (Deposit): VAN ALSTINE, R.E., 1969, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS NE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 626, 52 P.