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Colorado Feldspar Pegmatite

Past Producer in Fremont county in Colorado, United States with commodities Feldspar, REE
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Land status
  16. Ownership information
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10101828
MRDS ID D009893
Record type Site
Current site name Colorado Feldspar Pegmatite

Geographic coordinates

Geographic coordinates: -105.66586, 38.4264 (WGS84)
Elevation 2286
Relative position 4 MILES N 05 E OF COTOPAXI

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Arkansas Mountain(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)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 048N 012E 08 Colorado

Comments on the location information

  • EAST OF ARKANSAS MOUNTAIN AND BERNARD CREEK, NEAR COTOPAXI PROSPECT ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Feldspar Primary
REE Critical Secondary

Materials information

Materials Type of material
Euxenite Ore
Fluorite Ore
Microcline Ore
Monazite Ore
Biotite Gangue
Calcite Gangue
Hematite Gangue
Magnetite Gangue
Plagioclase Gangue
Quartz Gangue
Sericite Gangue

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 > Mafic Intrusive Rock > Diorite
    Rock unit name Granodiorite
    Rock description Granodiorite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Migmatitic Gneiss
    Rock description Migmatitic Gneiss

Nearby scientific data

(1) -105.66586, 38.4264
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Northern Wet Mountains, Thirtynine Mile Volcanic Field
Type of structure Local
Structure description Cotopaxi Fault, Texas Creek Fault

Ore body information

  • Thickness 2.44M
    Length 18.29M
    Width 12.19M
    Depth to top 0M
    Depth to bottom 2.44M

Controls for ore emplacement

  • Pegmatite

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Year of first production 1939

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Colorado Feldspar Co.
    Home office Canon City, Co.
    First year 1948

Comments on the workings information

  • OPEN CUT 60 X 40 X 8 FT DEEP

Reference information

Bibliographic references

  • Deposit

    HEINRICH, E. W., 1948, FLUORITE-RARE EARTH MINERAL PEGMATITES OF CHAFFEE AND FREMONT COUNTIES, COLORADO: AMERICAN MINERALOGIST, V. 33, NOS. 1-2, P. 71-72

  • Deposit

    TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-900, 1:62,500

  • Production

    HEINRICH, E. W., 1948

General comments

Subject category Comment text
Deposit POORLY DEVELOPED ZONING WITH MICROCLINE-QUARTZ CORE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1983 Collins, Donna B. 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.