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Gilman (Red Cliff) District

Past Producer in Eagle county in Colorado, United States with commodities Zinc, Silver, Copper, Lead, Gold, Manganese, Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10288667
MAS/MILS ID 80370002
Record type District
Current site name Gilman (Red Cliff) District
Alternate or previous names Red Cliff District, Battle Mountain District

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -106.39228, 39.53416 (WGS84)
Elevation 2719

Site location context

Political divisions (FIPS codes)

Eagle(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Minturn(quadrangle 1:24,000 scale)

Vail(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Eagle(hydrologic unit)

Colorado Headwaters(hydrologic accounting unit)

Colorado Headwaters(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

White River National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Eagle

Comments on the location information

  • On the east side of the Eagle River, between Gilman and Red Cliff, in secs. 12-13, T 6 S, R 81 W, and secs. 7,18-20, T 6 S, R 80 W.. The most productive part underlies about 3 square miles bounded by the Eagle River, and Rock, Willow, and Turkey Creeks.

Commodities

Commodity Importance
Zinc Critical Primary
Silver Primary
Copper Primary
Lead Primary
Gold Primary
Manganese Critical Secondary
Iron Secondary

Comments on the commodity information

  • In terms of total quantity and present (2006) value, zinc is the dominant metal produced.

Materials information

Materials Type of material
Anglesite Ore
Chalcopyrite Ore
Cerargyrite Ore
Cerussite Ore
Galena Ore
Hemimorphite Ore
Sphalerite Ore
Tetrahedrite Ore
Psilomelane Ore
Pyrolusite Ore
Smithsonite Ore
Barite Gangue
Dolomite Gangue
Goethite Gangue
Pyrite Gangue
Gypsum Gangue
Quartz Gangue
Siderite Gangue
Jarosite Gangue
Limonite Gangue
Gold Trace

Alteration

  • (Local) dolomitization and dissolution

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Orthoquartzite
    Rock unit name Sawatch Quartzite
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Host
    Rock type Sedimentary Rock > Mixed Clastic/Carbonate Rock
    Rock unit name Peerless Formation
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Orthoquartzite
    Rock unit name Parting Formation
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Dyer Dolomite
    Stratigraphic age (youngest) Middle Ordovician
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Gilman Sandstone
    Stratigraphic age (youngest) Late Devonian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Leadville Dolomite
    Stratigraphic age (youngest) Mississippian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
    Rock unit name Belden Formation
    Stratigraphic age (youngest) Mississippian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
    Rock unit name Minturn Formation
    Stratigraphic age (youngest) Mississippian
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Cross Creek Granite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Harding Sandstone
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Rock unit name Pando Porphyry
    Stratigraphic age (youngest) Pennsylvanian

Nearby scientific data

Main Entrance (1) -106.39228, 39.53416
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description NE flank of Sawatch anticline

Ore body information

  • General form REPLACEMENT
    Dip 15 N
    Thickness 5M
    Length 1219M
    Width 914M
    Area 5HA
    Depth to top 171M

Comments on the ore body information

  • Orebody materials listed include (1) the principal primary ore and gangue minerals, and (2) the principal oxidized ore minerals.

Comments on the geologic information

  • The deposits are principally replacement deposits (mantos) of zinc-lead-silver ore and chimney deposits of copper-silver ore in dolomites of Mississippian and Late Devonian age. The host rocks are little deformed or faulted and dip about 12 degrees to the NE, away from the Sawatch anticline. Less important are deposits in Sawatch Quartzite and veins in Precambrian rocks that were significant for gold and silver in early mining periods.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic

Mining district

District name Gilman (Red Cliff) District

Comments on the production information

  • Cumulative production from the district, most of which came from the Eagle mine or its predecessors, totals nearly 400,000 oz. of gold, 67.6 million oz. of silver, 212 million lb. of copper, 317 million lb. of lead, and 1.868 billion lb. of zinc, from 13.1 million tons of ore. About 200,000 tons of manganiferous iron ore was also produced. Gilman is the largest copper and 2nd largest zinc producing district in Colorado.

Comments on the reserve resource information

  • Known reserves have been depleted.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 23-MAY-2006 Beach, Richard A. Colorado 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.