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Alma-Lincoln Mine

Past Producer in Clear Creek county in Colorado, United States with commodities Gold, Silver, Lead, Copper, Zinc, Uranium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Economic information about the deposit and operations
  13. Mining district
  14. Mineral rights holdings
  15. Land status
  16. Production statistics
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10165765
MAS/MILS ID 0080190044
Record type Site
Current site name Alma-Lincoln Mine
Alternate or previous names Lincoln Group (Lincoln, South Lincoln, Josephine, Elliott and Barber), Ruby adit, Elliott & Barber 1 & 2, Platt, Josephine Shaft & Tunnel, Alma Lincoln

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
Main Entrance -105.55031, 39.74971 (WGS84) 2332 10
(click for info)
Main Entrance -105.55059, 39.74916 (WGS84) 2332 10

Site location context

Political divisions (FIPS codes)

Clear Creek(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Idaho Springs(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Clear(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Colorado Clear Creek

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 003 S 073 W 34 SWNENW Colorado

Comments on the location information

  • 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.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Primary
Copper Primary
Zinc Critical Secondary
Uranium Tertiary

Comments on the commodity information

  • 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.

Materials information

Materials Type of material
Chalcopyrite Ore
Enargite Ore
Galena Ore
Polybasite Ore
Pyrite Ore
Sphalerite Ore
Tennantite Ore
Gold Ore
Cerussite Ore
Chalcocite Ore
Covellite Ore
Ankerite Gangue
Quartz Gangue
Pitchblende Trace
Schroeckingerite Trace
Zippeite Trace

Alteration

  • (Local) silicification and brecciation

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Idaho Springs Formation
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Porphyry
    Stratigraphic age (youngest) Tertiary

Nearby scientific data

Main Entrance (1) -105.55031, 39.74971
ListMap
Main Entrance (2) -105.55059, 39.74916
ListMap

Economic information

Comments on the geologic information

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

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Idaho Springs District
District name Central City

Mineral rights holdings

Type of mineral rights Unknown

Land status

Ownership category Private

Production statistics

  • Year 1950
    Period 1902-1950
    Material ore
    Ore mined 10520.11mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Zinc Zinc 35554.38mt
    Minor Lead Lead 936667.79mt
    Minor Copper Copper 201049.37mt
    Major Silver Silver 5292848.25g
    Major Gold Gold 1277544.37g

Comments on the production information

  • 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.

Reference information

Bibliographic references

  • Deposit

    REF:MAS,OWNER:ROBERT H DELASHMUTT

  • 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.

  • 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.

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

General comments

Subject category Comment text
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.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-NOV-1983 Minecom U.S. Bureau of Mines
Updater 30-DEC-2005 Beach, Richard A. Colorado Geological Survey
Reporter 21-SEP-1978 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Updater 17-JUL-0007 Melton, Greg U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.