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Cascade Mine

Past Producer in Clear Creek county in Colorado, United States with commodities Silver, Gold, Lead, Zinc, Copper
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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. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10287657
MAS/MILS ID 0080190364
Record type Site
Current site name Cascade Mine
Alternate or previous names Hall Tunnel, Albert Hall Tunnel, Chloride, R. E. Lee, Tolland County Tunnel

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.63031, 39.72555 (WGS84)
Elevation 3048
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Clear Creek(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Georgetown(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)

Federal lands

Arapaho and Roosevelt National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Clear Creek

Comments on the location information

  • Cascade Mine, SW/4 SW/4 sec.1, T 4 S, R 74 W, about 6 miles WSW of Idaho Springs.

Commodities

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

Comments on the commodity information

  • Silver is the main commodity by value.

Materials information

Materials Type of material
Galena Ore
Pyrargyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Silver Ore
Quartz Gangue

Alteration

  • (Local) silicified

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 Metamorphic Rock > Schist
    Rock unit name Idaho Springs Formation
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid
    Rock unit name Silver Plume Granite
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Porphyry
    Stratigraphic age (youngest) Tertiary

Nearby scientific data

Main Entrance (1) -105.63031, 39.72555
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description brecciated and gouge-filled fissures

Comments on the geologic information

  • Ore occurs in sulfide veins filling fissures; major veins include the Chloride-R. E. Lee and North that trend NE and dip steeply NW.

Economic information about the deposit and operations

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

Mining district

District name Freeland-Lamartine District

Land status

Ownership category Private

Comments on the production information

  • The mine produced 18,000 tons of silver ore, including 11,000 tons that averaged 35 oz/ton silver between 1962 and 1964, that contained 525,000 oz. silver plus minor lead, zinc, gold, and copper.
  • Mine develops ground on the R. E. Lee-Chloride vein at the west end of the Lamartine vein system.

Comments on the reserve resource information

  • Report dated 1979 recommends targets for exploration. (Sunshine files)

Reference information

Bibliographic references

  • Deposit

    REF:CBM ANNUAL REPORT 1968 OWN/OP:WHITE ROCK AGGREGATE & MIN

  • Deposit

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

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-83 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Updater 28-DEC-05 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.