Green Mountain Mine

The Green Mountain Mine is a copper mine located in Fremont county, Colorado at an elevation of 8,084 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Green Mountain Mine
Secondary: Copper Boy Mine

Commodity

Primary: Copper
Secondary: Silver
Secondary: Gold
Tertiary: Zinc
Tertiary: Molybdenum

Location

State: Colorado
County: Fremont
District: Grape Creek District (Greenhorn District)

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Unknown

Ownership

Owner Name: Phelps Dodge Corp.
Years: 1980 -

Production

Year: 1954
Time Period: 1914-1954
Mined: 1300.000 mt
Material type: Ag-Au-Cu ore
Description: Cp_Grade: ^12.44% Cu, 1.33 Oz/Ton Ag, 0.11 Oz/Ton Au

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1925
Year Last Production: 1954
Discovery Year: 1925
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Model Name: Stratabound Precambrian sulfide, Colorado and Wyoming

Orebody

Not available

Structure

Type: R
Description: Northern Wet Mountains, Canon City Embayment, Thirtynine Mile Volcanic Field

Type: L
Description: Slickensides Strike N 40 W; Green Mountain Fault (Trends Nw); Ilse Fault

Alterations

Alteration Type: L
Alteration Text: Altered Biotite Gneisses; Kaolinization

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Analytical Data

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

Materials

Ore: Silver
Ore: Hydrozincite
Ore: Gahnite
Ore: Sphalerite
Ore: Gold
Ore: Cuprite
Ore: Chrysocolla
Ore: Covellite
Ore: Malachite
Ore: Chalcopyrite
Gangue: Pyrite
Gangue: Garnet
Gangue: Quartz

Comments

Comment (Commodity): LOCALLY RICH ZONES 12% CU AS MALACHITE IN PLACE; PHELPS DODGE REPORTS 18% PB IN AREA

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

Comment (Production): MINED 1914-1918, SPORADICALLY IN LATE 1930'S, LAST RECORDED SHIPMENT 1954

Comment (Development): BEST POTENTIAL APPEARS TO BE NEAR SHAFT 3 WHERE ASSAYS AVERAGED $198/TON

Comment (Deposit): COPPER STAINING ALONG FRACTURES AND IN LOCALIZED GOSSAN POCKETS

Comment (Workings): 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.

Comment (Deposit): Discovery Year: EARLY 1900'S

References

Reference (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.

Reference (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.

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

Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

Reference (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.

Reference (Reserve-Resource): COKER, 1982

Reference (Production): COKER, 1982

Reference (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

Colorado Mining Photos

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