Alma-Lincoln Mine

The Alma-Lincoln Mine is a copper, lead, gold, and silver mine located in Clear Creek county, Colorado at an elevation of 7,651 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: Alma-Lincoln Mine  

State:  Colorado

County:  Clear Creek

Elevation: 7,651 Feet (2,332 Meters)

Primary Mineral: Copper, Lead, Gold, Silver

Lat, Long: 39.74972, -105.54972

Map: View on Google Maps

Satelite View

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Satelite image of the Alma-Lincoln Mine

Alma-Lincoln Mine MRDS details

Site Name

Primary: Alma-Lincoln Mine
Secondary: Lincoln Group (Lincoln, South Lincoln, Josephine, Elliott and Barber)
Secondary: Ruby adit
Secondary: Elliott & Barber 1 & 2
Secondary: Platt
Secondary: Josephine Shaft & Tunnel
Secondary: Alma Lincoln


Commodity

Primary: Copper
Primary: Lead
Primary: Gold
Primary: Silver
Secondary: Zinc
Tertiary: Uranium


Location

State: Colorado
County: Clear Creek
District: Idaho Springs 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

Type: Unknown


Workings

Not available


Ownership

Not available


Production

Year: 1950
Time Period: 1902-1950
Mined: 10520.110 mt
Material type: ore


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Years of Production:
Organization:
Significant: N


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains


Mineral Deposit Model

Model Name: Polymetallic veins


Orebody

Not available


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: silicification and brecciation


Rocks

Name: Porphyry
Role: Host
Age Type: Host Rock
Age Young: Tertiary

Name: Pegmatite
Role: Host
Age Type: Host Rock
Age Young: Proterozoic

Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Proterozoic


Analytical Data

Not available


Materials

Ore: Sphalerite
Ore: Polybasite
Ore: Galena
Ore: Enargite
Ore: Chalcopyrite
Ore: Pyrite
Ore: Chalcocite
Ore: Tennantite
Ore: Covellite
Ore: Gold
Ore: Cerussite
Gangue: Ankerite
Gangue: Quartz
Trace: Zippeite
Trace: Schroeckingerite
Trace: Pitchblende


Comments

Comment (Geology): Four subparallel NE-trending fissure veins comprise the group: the Elliot and Barber, Josephine, South Lincoln, and Lincoln (from SE to NW).

Comment (Location): Mine is in NW/4 sec. 34, T 3 S, R 73 W, on the south side of Clear Creek about 1-1/4 mile west of Idaho Springs.

Comment (Deposit): INFORMATION FROM PRR 1673 RADIOACTIVITY 10XBG MINE HAS LONG HISTORY OF PRODUCTION AND SEVERAL MILES OF WOR MINE IS (?CURRENTLY) USED AS A "RANDON GAS MINE" AREA IS LOCATED ON THE 7-1/2 MINUTE MAP, CENTRAL CITY.

Comment (Production): Extensive stopes and early reports indicate substantial but unknown production before 1900. Production records show limited production for several years from1904 to 1927 and continuous production from 1932 to 1943: gold - 35,669 oz, silver - 152,124 oz, copper - 397,098 lb, lead - 1,974,091 lb, zinc - 44,427 lb.

Comment (Commodity): Production records indicate that the main value was in gold, with lesser values of silver, lead, copper, and zinc. Uranium minerals were found in the mine; no ore was produced, but for a time the mine was advertized for its reputed health qualities.


References

Reference (Deposit): Spurr, J. E., Garrey, G. H., and Ball, S. H., 1908, Economic geology of the Georgetown quadrangle, Colorado: U.S. Geological Survey Professional Paper 63, 422 p.

Reference (Deposit): Moench, R. H., and Drake, A. A., Jr., 1966, Economic geology of the Idaho Springs district, Clear Creek and Gilpin counties, Colorado: U.S. Geological Survey Bulletin 1208, 91 p.

Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

Reference (Deposit): REF:MAS,OWNER:ROBERT H DELASHMUTT