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Eight Mile Park District

Past Producer in Fremont county in Colorado, United States with commodities Feldspar, Mica, Quartz, Beryllium, Niobium (Columbium), Tantalum, Bismuth
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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. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10311023
Record type District
Current site name Eight Mile Park District

Geographic coordinates

Geographic coordinates: -105.3164, 38.47445 (WGS84)

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Royal Gorge(quadrangle 1:24,000 scale)

Canon City(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Federal lands

LG(Federal land areas administered by LG)

Geographic areas

Country State County
United States Colorado Fremont

Comments on the location information

  • South of U.S. Highway 50 near Royal Gorge. East of Canon City.

Commodities

Commodity Importance
Feldspar Primary
Mica Primary
Quartz Primary
Beryllium Critical Primary
Niobium (Columbium) Critical Secondary
Tantalum Critical Secondary
Bismuth Critical Secondary

Comments on the commodity information

  • Eight Mile Park is one of the most productive pegmatite districts in Colorado. Mica Lode is the largest historic mine. Others: Meyers' mine, School Section mine, Border Feldspar No. 1 and No. 2, and R.H. Magnuson prospect.

Materials information

Materials Type of material
Feldspar Ore
Muscovite Ore
Quartz Ore
Beryl Ore
Columbite Trace
Tantalite Trace
Garnet Trace
Tourmaline Trace
Biotite Unknown
Magnetite Unknown
Lepidolite Unknown
Cleavelandite Unknown
Amblygonite Unknown

Mineral occurrence model information

Model code 32
USGS model code 13
Deposit model name Pegmatites

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Quartz Diorite
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Stratigraphic age (youngest) Paleoproterozoic

Nearby scientific data

(1) -105.3164, 38.47445
ListMap

Economic information

Comments on the geologic information

  • Pegmatites trend N70E to E-W.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both

Mining district

District name Eight Mile Park District

Comments on the production information

  • The Mica Lode mine was the largest in the district and was the largest producer of feldspar in Colorado. It was also a producer of scrap mica and beryl (Hanley and others, 1950).

Reference information

Bibliographic references

  • Deposit

    Hanley, J.B., Heinrich, E.W., and Page, L.R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944: U.S. Geological Survey Professional Paper 227, 123 p.

  • Deposit

    Martin, Clay M., 1993, Reconnaissance investigations of selected columbium and tantalum occurrences in Colorado: U.S. Bureau of Mines Open File Report 17-93, 103 p., appendices

  • Deposit

    Argall, G.O. Jr., 1949, Industrial minerals of Colorado; Quarterly of the Colorado School of Mines, volume 44, No.2

  • Deposit

    Heinrich, E.W., 1948, Geologic map of Eight Mile Park, Fremont County, Colorado: American Mineralogist, v. 33, no. 7-8, Fig. 2.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-MAR-2005 Keller, John W. Colorado Geological Survey

Beyond USGS

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

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.