Mine detail: Green Mountain Mine

Previously called 'Copper Boy Mine'

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Location

Lat / long: 38.36751, -105.39474

Resource(M)

Primary: Copper
Secondary: Silver, Gold
Tertiary: Zinc, Molybdenum
Ore: Chalcopyrite, Chrysocolla, Covellite, Cuprite, Gahnite, Gold, Hydrozincite, Malachite, Silver, Sphalerite
Gangue: Garnet, Pyrite, Quartz
Discovery year: 1925

Production

Operation type: Underground
Production size: Small
Development status: Past Producer
First production started: 1925
Last production ended: 1954

Geology

Host rock:Migmatitic Gneiss
Host type:Schist,Gneiss,Amphibolite
Associated rock:Granodiorite
Associated type:Quartz Monzonite,Diorite,Granite
Structure:Northern Wet Mountains, Canon City Embayment, Thirtynine Mile Volcanic Field, Slickensides Strike N 40 W; Green Mountain Fault (Trends Nw); Ilse Fault
Tectonic:Central Cordillera (Southern Rocky Mountains)
Alteration processes:Altered Biotite Gneisses; Kaolinization

References

MRDSD009628
DEP10013371
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}{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OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, P. 81-82.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Deposit:: Sheridan, D.M., Raymond, W.H., Taylor, R.B., and Hasler, J.W., 1990, Metallogenic map of stratabound exhalative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.}{Production:: COKER, 1982}
ReporterCollins, Donna B.