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Grape Creek/Greenhorn District

Past Producer in Fremont county in Colorado, United States with commodities Gold, Lead, Zinc, Copper, Silver, Thorium, Barium-Barite
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Production statistics
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10013528
MRDS ID D009878
Record type District
Current site name Grape Creek/Greenhorn District
Alternate or previous names See: Hellgate Claims, Bear Claims Old Conac Property, Wagner-Grape Creek Lode, Dawson gold project, Copper King Mine
Related records 10263603

Geographic coordinates

Geographic coordinates: -105.33113, 38.39168 (WGS84)
Elevation 2134
Location accuracy 100(meters)
Relative position 12 MILES S 34 W OF CANON CITY, Location Given For Center Point Of General Area

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

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Colorado Fremont

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 020S 071W 17,19,20 Colorado

Comments on the location information

  • The district is at the northern end of the Wet Mountains. The eastern part of the district, including the Dawson gold project, is about 4 miles southwest of Canon City and three miles south of Royal Gorge. Scattered small deposits make up the western part of the district, stretching past Copper Gulch to the Arkansas River near Spikebuck.

Commodities

Commodity Importance
Gold Primary
Lead Primary
Zinc Critical Primary
Copper Primary
Silver Primary
Thorium Secondary
Barium-Barite Critical Secondary

Comments on the commodity information

  • This district is defined by base and precious metal mineralization in certain horizons within metamorphic package. Major exploration work was conducted at the Dawson gold project area within the district in the 1980s and 1990s.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Silver Ore
Sphalerite Ore
Thorite Ore

Alteration

  • (Local) Kaolinization

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 Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Migmatitic Gneiss
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid
    Stratigraphic age (youngest) Paleoproterozoic

Economic information

Geologic structures

Type of structure Regional
Structure description Northern Wet Mountains
Type of structure Local
Structure description Shear Zone Strikes N 55-60 W, Dips Vertically; "Mill Creek" Fault; Offshoots Of Ilse Fault

Controls for ore emplacement

  • Shear Zone; Faults, Fault Intersections

Comments on the geologic information

  • Mineralized layers in schist and gneiss generally trend east-west, but are contorted by folding. Mineralization may be more intense along fold hinges. The district is zoned, with gold and copper dominated mineralization in the eastern area (Dawson gold project), and zinc-lead dominated in the west.
  • Mineralized zones at the Dawson Project in the eastern part of the district strike generally east-west and dip steeply south.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Year of first production 1943
Year of last production 1945

Mining district

District name Grape Creek/Greenhorn District

Land status

Ownership category Private

Production statistics

  • Year 1945
    Period 1943-1945
    Material ore
    Ore mined 4144mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 40807.76g 0oz/st
    Major Lead Lead 60327.78mt 2wt-pct
    Major Zinc Zinc 156444mt 4wt-pct
    Major Gold Gold 2332.76g 0oz/st
    Major Copper Copper 8119.3mt 0wt-pct

Comments on the production information

  • THERE WAS EARLIER PRODUCTION IN THIS AREA, BUT NO RECORDS HAVE BEEN FOUND AS TO QUANTITIES, GRADES, ETC. There may also have been later production. Quantities above are from Vanderwilt, 1947.

Comments on the reserve resource information

  • Significant goldresources/reserves were outlined at the drilled area of the Dawson project in the eastern part of the district during the 1980s and 1990s. 339,000 short tons of ore grading 0.3 to 0.4 ounces per ton gold were calculated in one estimate, based on limited drilling and surface sampling. Grades of over 5 percent base metals are reported in the western part of the district.

Comments on the workings information

  • ADITS AND SHAFTS, PROSPECT PITS

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-82 Collins, Donna B. Colorado Geological Survey
Updater 09-JUN-05 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.