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Green Mountain Mine

Past Producer in Fremont county in Colorado, United States with commodities Copper, Silver, Gold, Zinc, Molybdenum
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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. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. General comments
  25. Reporter information

Geologic information

Identification information

Deposit ID 10013371
MRDS ID D009628
Record type Site
Current site name Green Mountain Mine
Alternate or previous names Copper Boy Mine
Related records 10166699

Geographic coordinates

Geographic coordinates: -105.39474, 38.36751 (WGS84)
Elevation 2464
Relative position 9.9 MILES S 61 W OF CANON CITY POST OFFICE

Site location context

Political divisions (FIPS codes)

Fremont(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Iron 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
6th Principal 019S 072W 26 SE OF NE Colorado

Comments on the location information

  • SOUTH FROM PARKDALE ON COPPER GULCH ROAD 14 MILES, THEN EAST 5 MILES ON TALBERT GULCH TO MINE ; INFO FROM LAND.ST :(1976)

Commodities

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

Comments on the commodity information

  • LOCALLY RICH ZONES 12% CU AS MALACHITE IN PLACE; PHELPS DODGE REPORTS 18% PB IN AREA

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Covellite Ore
Cuprite Ore
Gahnite Ore
Gold Ore
Hydrozincite Ore
Malachite Ore
Silver Ore
Sphalerite Ore
Garnet Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Altered Biotite Gneisses; Kaolinization

Analytical data

Result CU (0.17-12.0 %), AG (0.1-0.8 OZ/TON), AU (0.01-0.13 OZ/TON), ZN (0.06-6.8 %)
Result AVG CU 2.48%

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 > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Granodiorite
    Rock description Granodiorite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Migmatitic Gneiss
    Rock description Migmatitic Gneiss
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

(1) -105.39474, 38.36751
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Northern Wet Mountains, Canon City Embayment, Thirtynine Mile Volcanic Field
Type of structure Local
Structure description Slickensides Strike N 40 W; Green Mountain Fault (Trends Nw); Ilse Fault

Ore body information

  • Strike N 40 E
    Dip VERTICAL
    Length 298.7M
    Width 0.91M

Controls for ore emplacement

  • Faults, Fault Intersections; Shear Zones

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1925
Year of first production 1925
Year of last production 1954

Mining district

District name Grape Creek District (Greenhorn District)

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Phelps Dodge Corp.
    First year 1980

Production statistics

  • Year 1954
    Period 1914-1954
    Material Ag-Au-Cu ore
    Ore mined 1300mt
    Accuracy Estimate
    Description Cp_Grade: ^12.44% Cu, 1.33 Oz/Ton Ag, 0.11 Oz/Ton Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Gold Gold 4g/mt
    Minor Ore Silver Silver 45g/mt
    Major Ore Copper Copper 13wt-pct

Comments on the production information

  • MINED 1914-1918, SPORADICALLY IN LATE 1930'S, LAST RECORDED SHIPMENT 1954

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Inferred 99000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 12.44 wt-pct Copper Major 1982

Workings at the site

  • Type of workings Unknown
    Area 1.85HA
    Length 137.77M
    Overall depth 60.96M
    Overall length 298.7M
    Overall width 73.15M

Comments on the workings information

  • 8 SHAFTS, 5 PITS; SHAFT 1 G. T. 200 FT DEEP, CAVED BELOW LEVEL 1. SHAFT 2 23 FT DEEP. SHAFT 3 22 FT DEEP WITH INCLINED DRIFT 22 FT LONG BEARING N 36 E. SHAFT 4 24 FT DEEP. SHAFT 5 29 FT DEEP, INACCESSIBLE. SHAFT 6 13 FT DEEP. SHAFT 7 36 FT DEEP INCLINED 60 DEGREES TO NW. SHAFT 8 15 FT DEEP, LARGELY CAVED. PIT 1-8 X 8 X 4 FT; PIT 2-5 X 6 X 2.5 FT; PIT 3-6 X 9 X 3 FT; PIT 4-15 X 6 X 2 FT; PIT 5-30 X 6 X 6 FT.

Comments on development

  • BEST POTENTIAL APPEARS TO BE NEAR SHAFT 3 WHERE ASSAYS AVERAGED $198/TON

Reference information

Bibliographic references

  • Deposit

    COKER, R. J., 1982, MINERAL RESOURCES OF THE ARKANSAS CANYON PLANNING UNIT WITH SPECIAL EMPHASIS ON THE FORMER GRAPE CREEK WILDERNESS STUDY AREAS AND THE MCINTYRE HILLS WILDERNESS STUDY AREA: US BLM MINERAL REPORT, P. 30-34

  • Deposit

    TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., AND EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1: 62,500.

  • Deposit

    RAYMOND, W. H. AND SHERIDAN, D. M., 1980, DATA ON SOME STRATABOUND PRECAMBRIAN DEPOSITS CONTAINING ZINC, COPPER, LEAD, SILVER, AND GOLD IN THE ROYAL GORGE 15-MINUTE QUADRANGLE, COLORADO: USGS OFR 80-833, 8 P.

  • Deposit

    HEINRICH, E. W., 1981, PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, P. 81-82.

  • Production

    COKER, 1982

  • Reserve-Resource

    COKER, 1982

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

  • 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.

General comments

Subject category Comment text
Deposit COPPER STAINING ALONG FRACTURES AND IN LOCALIZED GOSSAN POCKETS
Deposit Discovery Year: EARLY 1900'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1982 Collins, Donna B. Colorado Geological Survey

Beyond USGS

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

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Phelps Dodge Corp. — acquired by Subsidiary of Freeport-McMoRan (2007)
    Acquired by Freeport-McMoRan Copper & Gold in 2007 in what was then the largest mining-industry deal ever (~US$26 B).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

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.