1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

American Sisters

Past Producer in Clear Creek county in Colorado, United States with commodities Gold, Silver, Copper, Lead, Zinc
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Production statistics
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10214660
MAS/MILS ID 0080190121
Record type Site
Current site name American Sisters

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.63337, 39.75527 (WGS84)
Elevation 3139
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

Empire(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

Commodities

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

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Quartz Gangue
Siderite Gangue
Sericite Gangue
Chalcopyrite Trace
Pyrite Trace
Proustite Trace
Pearceite Trace

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

Nearby scientific data

Main Entrance (1) -105.63337, 39.75527
ListMap

Economic information

Economic information about the deposit and operations

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

Mining district

District name Dumont

Land status

Ownership category National Forest

Production statistics

  • Year 1892
    Period 1887-92
    Material ore
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Lead Lead 121682.5mt
    Trace Silver Silver 10842953.4g
    Major Gold Gold 1648.48g
  • Year 1938
    Period 1902-38
    Material ore
    Ore mined 5849.1mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Zinc Zinc 58426.77mt
    Minor Lead Lead 75339.87mt
    Minor Copper Copper 3910.41mt
    Trace Silver Silver 2220384.19g
    Major Gold Gold 2519.38g

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1983 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Updater 27-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.