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Cotopaxi District

Past Producer in Fremont county in Colorado, United States with commodities Copper, Zinc, Lead, Gold, Silver
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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. Mining district
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10101797
MRDS ID D009484
Record type District
Current site name Cotopaxi District

Geographic coordinates

Geographic coordinates: -105.6953, 38.38195 (WGS84)
Elevation 2316
Relative position 3.5 MILES N15E 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;048N 012E;011E 07,08,17,18;25 Colorado

Comments on the location information

  • Locational point is near Cotopaxi Mine, which is 0.5 mi northwest of the small town of Cotopaxi on the Arkansas River. Two smaller Proterozoic base-metal sulfide occurrences, the Sand Gulch No. 2 and the Carson Mining Company prospect, are located in similar rocks about 3 mi north-northeast of the Cotopaxi Mine.

Commodities

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

Materials information

Materials Type of material
Chalcopyrite Ore
Gahnite Ore
Galena Ore
Gold Ore
Silver Ore
Sphalerite Ore
Biotite Gangue
Garnet Gangue
Gypsum Gangue
Hornblende Gangue
Quartz Gangue

Mineral occurrence model information

Model code 271
USGS model code Unassigned
Deposit model name Stratabound Precambrian sulfide, Colorado and Wyoming

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Granodiorite Of Boulder Creek Age
    Rock description Granodiorite Of Boulder Creek Age
    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
  • Host or associated Host
    Rock type Metamorphic Rock > Skarn (Tactite)

Nearby scientific data

(1) -105.6953, 38.38195
ListMap

Economic information

Geologic structures

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

Ore body information

  • General form LENSOID

Controls for ore emplacement

  • Leucocratic Lenses Within Host Rock

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875
Year of first production 1850
Year of last production 1945

Mining district

District name Cotopaxi District

Land status

Ownership category BLM Administrative Area

Reference information

Bibliographic references

  • Deposit

    VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MINERAL RESOURCES BOARD, P. 83-85.

  • 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 T-900, 1:62,500.

  • Deposit

    LINDGREN, WALDEMAR, 19078 NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLORADO: USGS BULLETIN 340, P. 157-174.

  • Deposit

    HEINRICH, E.W., 1981, PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, P. 30, 83-88

  • Deposit

    HARRER, C.M. AND TESCH, W.J., JR., 1959, RECONNAISSANCE OF IRON OCCURRENCES IN COLORADO: USBM IC 7918, 82 P.

  • Production

    VANDERWILT, J.W., 1947, P. 84

  • Deposit

    Sheridan, D.M., and Raymond, W.H., 1984, Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado: U.S. Geological Survey Bulletin 1550, 31 p.

  • Geology

    Heimann, Adriana, 2002, The composition of zinc-rich spinels associated with metamorphosed massive sulfide deposits - a reexamination: Society of Economic Geologists Abstracts, 2002 Denver Annual Meeting.

  • Deposit

    Sheridan, D.M., Raymond, W.H., Taylor, R.B., and Hasler, J.W., 1990, Metallogenic map of stratabound exhalative and related occurrences in Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1971, scale 1:1,000,000.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1982 Collins, Donna B. Colorado Geological Survey
Updater 02-JUN-2004 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.